diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 8f982f7..f95d5d2 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -70,7 +70,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Generate code coverage
-        run: cargo +nightly tarpaulin --verbose --engine llvm --no-dead-code --all-features --workspace --timeout 120 --out xml
+        run: cargo +nightly tarpaulin --all-features --workspace --timeout 120 --out xml
 
       - name: Upload to codecov.io
         uses: codecov/codecov-action@v2
diff --git a/.github/workflows/pypublish.yml b/.github/workflows/pypublish.yml
index 2bd286a..7f64d70 100644
--- a/.github/workflows/pypublish.yml
+++ b/.github/workflows/pypublish.yml
@@ -32,13 +32,13 @@ jobs:
           target: ${{ matrix.target }}
           args: --sdist --release --out dist --find-interpreter
           sccache: 'true'
-          working-directory: vcf2parquet-py
+          working-directory: python
           manylinux: auto
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         with:
           name: wheels
-          path: vcf2parquet-py/dist
+          path: python/dist
 
   windows:
     runs-on: windows-latest
@@ -57,12 +57,12 @@ jobs:
           target: ${{ matrix.target }}
           args: --sdist --release --out dist --find-interpreter
           sccache: 'true'
-          working-directory: vcf2parquet-py
+          working-directory: python
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         with:
           name: wheels
-          path: vcf2parquet-py/dist
+          path: python/dist
 
   macos:
     runs-on: macos-latest
@@ -80,12 +80,12 @@ jobs:
           target: ${{ matrix.target }}
           args: --sdist --release --out dist --find-interpreter
           sccache: 'true'
-          working-directory: vcf2parquet-py
+          working-directory: python
       - name: Upload wheels
         uses: actions/upload-artifact@v4
         with:
           name: wheels
-          path: vcf2parquet-py/dist
+          path: python/dist
 
   release:
     name: Release
diff --git a/Cargo.lock b/Cargo.lock
index ca55af0..874476d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -100,32 +100,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "arrow2"
-version = "0.17.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59c468daea140b747d781a1da9f7db5f0a8e6636d4af20cc539e43d05b0604fa"
-dependencies = [
- "ahash",
- "arrow-format",
- "base64",
- "bytemuck",
- "chrono",
- "dyn-clone",
- "either",
- "ethnum",
- "fallible-streaming-iterator",
- "foreign_vec",
- "futures",
- "getrandom",
- "hash_hasher",
- "num-traits",
- "parquet2",
- "rustc_version",
- "simdutf8",
- "streaming-iterator",
-]
-
 [[package]]
 name = "arrow2"
 version = "0.18.0"
@@ -229,12 +203,6 @@ version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
 
-[[package]]
-name = "bitflags"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
 [[package]]
 name = "bitflags"
 version = "2.5.0"
@@ -385,7 +353,7 @@ version = "4.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90239a040c80f5e14809ca132ddc4176ab33d5e17e49691793296e3fcb34d72f"
 dependencies = [
- "heck 0.5.0",
+ "heck",
  "proc-macro2",
  "quote",
  "syn",
@@ -446,15 +414,6 @@ version = "0.8.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "248e3bacc7dc6baa3b21e405ee045c3047101a49145e7e9eca583ab4c2ca5345"
 
-[[package]]
-name = "deranged"
-version = "0.3.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b42b6fa04a440b495c8b04d0e71b707c585f83cb9cb28cf8cd0d976c315e31b4"
-dependencies = [
- "powerfmt",
-]
-
 [[package]]
 name = "difflib"
 version = "0.4.0"
@@ -646,12 +605,6 @@ dependencies = [
  "ahash",
 ]
 
-[[package]]
-name = "heck"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
-
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -668,18 +621,6 @@ dependencies = [
  "hashbrown",
 ]
 
-[[package]]
-name = "indoc"
-version = "2.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e186cfbae8084e513daff4240b4797e342f988cecda4fb6c939150f96315fd8"
-
-[[package]]
-name = "itoa"
-version = "1.0.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"
-
 [[package]]
 name = "jobserver"
 version = "0.1.28"
@@ -716,16 +657,6 @@ version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "01cda141df6706de531b6c46c3a33ecca755538219bd484262fa09410c13539c"
 
-[[package]]
-name = "lock_api"
-version = "0.4.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c168f8615b12bc01f9c17e2eb0cc07dcae1940121185446edc3744920e8ef45"
-dependencies = [
- "autocfg",
- "scopeguard",
-]
-
 [[package]]
 name = "log"
 version = "0.4.21"
@@ -769,15 +700,6 @@ version = "2.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
 
-[[package]]
-name = "memoffset"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a634b1c61a95585bd15607c6ab0c4e5b226e695ff2800ba0cdccddf208c406c"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "miniz_oxide"
 version = "0.7.2"
@@ -871,12 +793,6 @@ dependencies = [
  "percent-encoding",
 ]
 
-[[package]]
-name = "num-conv"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
-
 [[package]]
 name = "num-traits"
 version = "0.2.18"
@@ -886,44 +802,12 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "num_threads"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c7398b9c8b70908f6371f47ed36737907c87c52af34c268fed0bf0ceb92ead9"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "once_cell"
 version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
-[[package]]
-name = "parking_lot"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
-dependencies = [
- "lock_api",
- "parking_lot_core",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.9.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c42a9226546d68acdd9c0a280d17ce19bfe27a46bf68784e4066115788d008e"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "smallvec",
- "windows-targets 0.48.5",
-]
-
 [[package]]
 name = "parquet-format-safe"
 version = "0.2.4"
@@ -985,18 +869,6 @@ dependencies = [
  "array-init-cursor",
 ]
 
-[[package]]
-name = "portable-atomic"
-version = "1.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
-
-[[package]]
-name = "powerfmt"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
-
 [[package]]
 name = "predicates"
 version = "3.1.0"
@@ -1033,69 +905,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "pyo3"
-version = "0.20.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53bdbb96d49157e65d45cc287af5f32ffadd5f4761438b527b055fb0d4bb8233"
-dependencies = [
- "cfg-if",
- "indoc",
- "libc",
- "memoffset",
- "parking_lot",
- "portable-atomic",
- "pyo3-build-config",
- "pyo3-ffi",
- "pyo3-macros",
- "unindent",
-]
-
-[[package]]
-name = "pyo3-build-config"
-version = "0.20.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "deaa5745de3f5231ce10517a1f5dd97d53e5a2fd77aa6b5842292085831d48d7"
-dependencies = [
- "once_cell",
- "target-lexicon",
-]
-
-[[package]]
-name = "pyo3-ffi"
-version = "0.20.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62b42531d03e08d4ef1f6e85a2ed422eb678b8cd62b762e53891c05faf0d4afa"
-dependencies = [
- "libc",
- "pyo3-build-config",
-]
-
-[[package]]
-name = "pyo3-macros"
-version = "0.20.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7305c720fa01b8055ec95e484a6eca7a83c841267f0dd5280f0c8b8551d2c158"
-dependencies = [
- "proc-macro2",
- "pyo3-macros-backend",
- "quote",
- "syn",
-]
-
-[[package]]
-name = "pyo3-macros-backend"
-version = "0.20.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c7e9b68bb9c3149c5b0cade5d07f953d6d125eb4337723c4ccdb665f1f96185"
-dependencies = [
- "heck 0.4.1",
- "proc-macro2",
- "pyo3-build-config",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "quote"
 version = "1.0.35"
@@ -1125,15 +934,6 @@ dependencies = [
  "crossbeam-utils",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4722d768eff46b75989dd134e5c353f0d6296e5aaa3132e776cbdb56be7731aa"
-dependencies = [
- "bitflags 1.3.2",
-]
-
 [[package]]
 name = "regex-automata"
 version = "0.4.6"
@@ -1161,19 +961,13 @@ version = "0.38.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ea3e1a662af26cd7a3ba09c0297a31af215563ecf42817c98df621387f4e949"
 dependencies = [
- "bitflags 2.5.0",
+ "bitflags",
  "errno",
  "libc",
  "linux-raw-sys",
  "windows-sys",
 ]
 
-[[package]]
-name = "scopeguard"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
-
 [[package]]
 name = "semver"
 version = "1.0.22"
@@ -1212,17 +1006,6 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f27f6278552951f1f2b8cf9da965d10969b2efdea95a6ec47987ab46edfe263a"
 
-[[package]]
-name = "simplelog"
-version = "0.12.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16257adbfaef1ee58b1363bdc0664c9b8e1e30aed86049635fb5f147d065a9c0"
-dependencies = [
- "log",
- "termcolor",
- "time",
-]
-
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -1232,12 +1015,6 @@ dependencies = [
  "autocfg",
 ]
 
-[[package]]
-name = "smallvec"
-version = "1.13.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6ecd384b10a64542d77071bd64bd7b231f4ed5940fba55e98c3de13824cf3d7"
-
 [[package]]
 name = "snap"
 version = "1.1.1"
@@ -1276,12 +1053,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "target-lexicon"
-version = "0.12.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e1fc403891a21bcfb7c37834ba66a547a8f402146eba7265b5a6d88059c9ff2f"
-
 [[package]]
 name = "tempfile"
 version = "3.10.1"
@@ -1294,15 +1065,6 @@ dependencies = [
  "windows-sys",
 ]
 
-[[package]]
-name = "termcolor"
-version = "1.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "06794f8f6c5c898b3275aebefa6b8a1cb24cd2c6c79397ab15774837a0bc5755"
-dependencies = [
- "winapi-util",
-]
-
 [[package]]
 name = "termtree"
 version = "0.4.1"
@@ -1329,51 +1091,12 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "time"
-version = "0.3.34"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c8248b6521bb14bc45b4067159b9b6ad792e2d6d754d6c41fb50e29fefe38749"
-dependencies = [
- "deranged",
- "itoa",
- "libc",
- "num-conv",
- "num_threads",
- "powerfmt",
- "serde",
- "time-core",
- "time-macros",
-]
-
-[[package]]
-name = "time-core"
-version = "0.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef927ca75afb808a4d64dd374f00a2adf8d0fcff8e7b184af886c3c87ec4a3f3"
-
-[[package]]
-name = "time-macros"
-version = "0.2.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ba3a3ef41e6672a2f0f001392bb5dcd3ff0a9992d618ca761a11c3121547774"
-dependencies = [
- "num-conv",
- "time-core",
-]
-
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
-[[package]]
-name = "unindent"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7de7d73e1754487cb58364ee906a499937a0dfabd86bcb980fa99ec8c8fa2ce"
-
 [[package]]
 name = "utf8parse"
 version = "0.2.1"
@@ -1384,29 +1107,9 @@ checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
 name = "vcf2parquet"
 version = "0.6.0"
 dependencies = [
+ "arrow2",
  "assert_cmd",
- "tempfile",
- "vcf2parquet-bin",
- "vcf2parquet-lib",
-]
-
-[[package]]
-name = "vcf2parquet-bin"
-version = "0.6.0"
-dependencies = [
- "arrow2 0.18.0",
  "clap",
- "niffler",
- "simplelog",
- "thiserror",
- "vcf2parquet-lib",
-]
-
-[[package]]
-name = "vcf2parquet-lib"
-version = "0.6.0"
-dependencies = [
- "arrow2 0.18.0",
  "lazy_static",
  "log",
  "niffler",
@@ -1417,18 +1120,6 @@ dependencies = [
  "thiserror",
 ]
 
-[[package]]
-name = "vcf2parquet-py"
-version = "0.6.0"
-dependencies = [
- "arrow2 0.17.4",
- "niffler",
- "pyo3",
- "tempfile",
- "thiserror",
- "vcf2parquet-lib",
-]
-
 [[package]]
 name = "version_check"
 version = "0.9.4"
@@ -1504,59 +1195,13 @@ version = "0.2.92"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "af190c94f2773fdb3729c55b007a722abb5384da03bc0986df4c289bf5567e96"
 
-[[package]]
-name = "winapi"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
-dependencies = [
- "winapi-i686-pc-windows-gnu",
- "winapi-x86_64-pc-windows-gnu",
-]
-
-[[package]]
-name = "winapi-i686-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-
-[[package]]
-name = "winapi-util"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f29e6f9198ba0d26b4c9f07dbe6f9ed633e1f3d5b8b414090084349e46a52596"
-dependencies = [
- "winapi",
-]
-
-[[package]]
-name = "winapi-x86_64-pc-windows-gnu"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
 [[package]]
 name = "windows-sys"
 version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
 dependencies = [
- "windows-targets 0.52.4",
-]
-
-[[package]]
-name = "windows-targets"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
-dependencies = [
- "windows_aarch64_gnullvm 0.48.5",
- "windows_aarch64_msvc 0.48.5",
- "windows_i686_gnu 0.48.5",
- "windows_i686_msvc 0.48.5",
- "windows_x86_64_gnu 0.48.5",
- "windows_x86_64_gnullvm 0.48.5",
- "windows_x86_64_msvc 0.48.5",
+ "windows-targets",
 ]
 
 [[package]]
@@ -1565,93 +1210,51 @@ version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7dd37b7e5ab9018759f893a1952c9420d060016fc19a472b4bb20d1bdd694d1b"
 dependencies = [
- "windows_aarch64_gnullvm 0.52.4",
- "windows_aarch64_msvc 0.52.4",
- "windows_i686_gnu 0.52.4",
- "windows_i686_msvc 0.52.4",
- "windows_x86_64_gnu 0.52.4",
- "windows_x86_64_gnullvm 0.52.4",
- "windows_x86_64_msvc 0.52.4",
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
 ]
 
-[[package]]
-name = "windows_aarch64_gnullvm"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
-
 [[package]]
 name = "windows_aarch64_gnullvm"
 version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bcf46cf4c365c6f2d1cc93ce535f2c8b244591df96ceee75d8e83deb70a9cac9"
 
-[[package]]
-name = "windows_aarch64_msvc"
-version = "0.48.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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 checksum = "da9f259dd3bcf6990b55bffd094c4f7235817ba4ceebde8e6d11cd0c5633b675"
 
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diff --git a/Cargo.toml b/Cargo.toml
index f6de8ad..4b63f00 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,32 +13,30 @@ keywords = ["bioinformatics", "parquet"]
 
 
 [dependencies]
-vcf2parquet-lib = { path = "vcf2parquet-lib", version = "0.6.0", optional = true }
-vcf2parquet-bin = { path = "vcf2parquet-bin", version = "0.6.0", optional = true }
+# parallel
+rayon      = { version = "1" }
 
-[dev-dependencies]
-tempfile        = { version = "3" }
-assert_cmd      = { version = "2" }
-
-
-[workspace]
-members = ["vcf2parquet-lib", "vcf2parquet-bin", "vcf2parquet-py"]
+# input output management
+niffler     = { version = "2" }
+noodles     = { version = "0.64", features = ["vcf"] }
+arrow2      = { version = "0.18", features = ["io_parquet", "io_parquet_compression"] }
+rustc-hash  = { version = "1" }
 
+# logging management
+log         = { version = "0.4" }
 
-[features]
-default = ["lib"]
+# error management
+thiserror       = { version = "1" }
 
-lib = ["vcf2parquet-lib"]
-bin = ["vcf2parquet-bin"]
+# cli management
+clap            = { version = "4", features = ["derive"] }
 
 
-[[bin]]
-name = "vcf2parquet"
-required-features = ["bin"]
+[dev-dependencies]
+lazy_static     = { version = "1" }
+tempfile        = { version = "3" }
+assert_cmd      = { version = "2" }
 
-[[test]]
-name = "functional"
-required-features = ["bin"]
 
 [package.metadata.docs.rs]
 all-features = true
diff --git a/vcf2parquet-py/Cargo.toml b/python/Cargo.toml
similarity index 100%
rename from vcf2parquet-py/Cargo.toml
rename to python/Cargo.toml
diff --git a/vcf2parquet-py/Readme.md b/python/Readme.md
similarity index 100%
rename from vcf2parquet-py/Readme.md
rename to python/Readme.md
diff --git a/vcf2parquet-py/pyproject.toml b/python/pyproject.toml
similarity index 100%
rename from vcf2parquet-py/pyproject.toml
rename to python/pyproject.toml
diff --git a/vcf2parquet-py/src/error.rs b/python/src/error.rs
similarity index 100%
rename from vcf2parquet-py/src/error.rs
rename to python/src/error.rs
diff --git a/vcf2parquet-py/src/lib.rs b/python/src/lib.rs
similarity index 100%
rename from vcf2parquet-py/src/lib.rs
rename to python/src/lib.rs
diff --git a/vcf2parquet-py/tests/test_vcf2parquet.py b/python/tests/test_vcf2parquet.py
similarity index 100%
rename from vcf2parquet-py/tests/test_vcf2parquet.py
rename to python/tests/test_vcf2parquet.py
diff --git a/vcf2parquet-bin/src/cli.rs b/src/cli.rs
similarity index 95%
rename from vcf2parquet-bin/src/cli.rs
rename to src/cli.rs
index bbb15e2..db4e958 100644
--- a/vcf2parquet-bin/src/cli.rs
+++ b/src/cli.rs
@@ -6,17 +6,32 @@
 
 /* project use */
 
+/// Compression available for user
 #[derive(Debug, clap::ValueEnum, Clone, Copy)]
 pub enum Compression {
+    /// No compression
     Uncompressed,
+
+    /// Snappy compression
     Snappy,
+
+    /// Gzip compression
     Gzip,
+
+    /// Lzo compression
     Lzo,
+
+    /// Brotly compression
     Brotli,
+
+    /// Lz4 compression
     Lz4,
+
+    /// Zstd compression
     Zstd,
 }
 
+/// Define cli of vcf2parquet
 #[derive(clap::Parser, std::fmt::Debug)]
 #[command(
     name = "vcf2parquet",
@@ -49,9 +64,13 @@ pub struct Command {
     subcommand: SubCommand,
 }
 
+/// Enum to manage sub command
 #[derive(clap::Parser, std::fmt::Debug, Clone)]
 pub enum SubCommand {
+    /// Convert a vcf in a parquet
     Convert(Convert),
+
+    /// Convert a vcf in multiple parquet file each file contains `batch_size` record
     Split(Split),
 }
 
diff --git a/vcf2parquet-lib/src/error.rs b/src/error.rs
similarity index 89%
rename from vcf2parquet-lib/src/error.rs
rename to src/error.rs
index 9182b43..dde4087 100644
--- a/vcf2parquet-lib/src/error.rs
+++ b/src/error.rs
@@ -28,6 +28,10 @@ pub enum Error {
     /// Noodles header vcf error
     #[error(transparent)]
     NoodlesHeader(#[from] noodles::vcf::header::ParseError),
+
+    /// Niffler error
+    #[error(transparent)]
+    Niffler(#[from] niffler::Error),
 }
 
 pub type Result<T> = std::result::Result<T, Error>;
diff --git a/src/lib.rs b/src/lib.rs
index c1ddeb6..98e38c9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,329 @@
-#![warn(missing_docs)]
+//! vcf2parquet library
 
-//! vcf2parquet allow user to convert a vcf in parquet format.
+#[warn(missing_docs)]
+/* std use */
 
-pub use vcf2parquet_lib::*;
+/* crate use */
+
+/* project use */
+
+/* mod section */
+pub mod cli;
+pub mod error;
+pub mod name2data;
+pub mod record2chunk;
+pub mod schema;
+
+/// Read `input` vcf and write parquet in `output`
+pub fn vcf2parquet<R, W>(
+    input: &mut R,
+    output: &mut W,
+    batch_size: usize,
+    compression: arrow2::io::parquet::write::CompressionOptions,
+    info_optional: bool,
+) -> error::Result<()>
+where
+    R: std::io::BufRead,
+    W: std::io::Write,
+{
+    // VCF section
+    let mut reader = noodles::vcf::Reader::new(input);
+
+    let vcf_header: noodles::vcf::Header = reader.read_header()?;
+
+    // Parquet section
+    let schema = schema::from_header(&vcf_header, info_optional)?;
+
+    let mut iterator = reader.records(&vcf_header);
+    let chunk_iterator = record2chunk::Record2Chunk::new(
+        &mut iterator,
+        batch_size,
+        vcf_header.clone(),
+        schema.clone(),
+    );
+
+    let options = arrow2::io::parquet::write::WriteOptions {
+        write_statistics: true,
+        compression,
+        version: arrow2::io::parquet::write::Version::V2,
+        data_pagesize_limit: Some(batch_size),
+    };
+
+    let encodings = chunk_iterator.encodings();
+    let row_groups = arrow2::io::parquet::write::RowGroupIterator::try_new(
+        chunk_iterator,
+        &schema,
+        options,
+        encodings,
+    )?;
+
+    let mut writer = arrow2::io::parquet::write::FileWriter::try_new(output, schema, options)?;
+
+    for group in row_groups {
+        writer.write(group?)?;
+    }
+    let _ = writer.end(None)?;
+
+    Ok(())
+}
+
+/// Read `input` vcf and write each row group in a parquet file match with template
+pub fn vcf2multiparquet<R>(
+    input: &mut R,
+    template: &str,
+    batch_size: usize,
+    compression: arrow2::io::parquet::write::CompressionOptions,
+    info_optional: bool,
+) -> error::Result<()>
+where
+    R: std::io::BufRead,
+{
+    // VCF section
+    let mut reader = noodles::vcf::Reader::new(input);
+
+    let vcf_header: noodles::vcf::Header = reader.read_header()?;
+
+    // Parquet section
+    let schema = schema::from_header(&vcf_header, info_optional)?;
+
+    let mut iterator = reader.records(&vcf_header);
+    let chunk_iterator = record2chunk::Record2Chunk::new(
+        &mut iterator,
+        batch_size,
+        vcf_header.clone(),
+        schema.clone(),
+    );
+
+    let options = arrow2::io::parquet::write::WriteOptions {
+        write_statistics: true,
+        compression,
+        version: arrow2::io::parquet::write::Version::V2,
+        data_pagesize_limit: Some(batch_size),
+    };
+
+    let encodings = chunk_iterator.encodings();
+    let row_groups = arrow2::io::parquet::write::RowGroupIterator::try_new(
+        chunk_iterator,
+        &schema,
+        options,
+        encodings,
+    )?;
+
+    for (index, group) in row_groups.enumerate() {
+        let output = std::fs::File::create(template.replace("{}", &index.to_string()))?;
+        let mut writer =
+            arrow2::io::parquet::write::FileWriter::try_new(output, schema.clone(), options)?;
+
+        writer.write(group?)?;
+        writer.end(None)?;
+    }
+
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    static VCF_FILE: &[u8] = b"##fileformat=VCFv4.3
+#CHROM\tPOS\tID\tREF\tALT\tQUAL\tFILTER\tINFO
+1\t925952\t1019397\tG\tA\t.\t.\t.
+";
+
+    static PARQUET_FILE: &[u8] = &[
+        80, 65, 82, 49, 21, 6, 21, 10, 21, 50, 92, 21, 2, 21, 0, 21, 2, 21, 0, 21, 0, 21, 0, 17,
+        28, 54, 0, 40, 1, 49, 24, 1, 49, 0, 0, 0, 31, 139, 8, 0, 0, 0, 0, 0, 0, 255, 99, 100, 96,
+        96, 48, 4, 0, 151, 222, 156, 170, 5, 0, 0, 0, 21, 12, 25, 37, 0, 6, 25, 24, 10, 99, 104,
+        114, 111, 109, 111, 115, 111, 109, 101, 21, 4, 22, 2, 22, 74, 22, 114, 38, 8, 60, 54, 0,
+        40, 1, 49, 24, 1, 49, 0, 0, 21, 6, 21, 8, 21, 48, 92, 21, 2, 21, 0, 21, 2, 21, 0, 21, 0,
+        21, 0, 17, 28, 54, 0, 40, 4, 0, 33, 14, 0, 24, 4, 0, 33, 14, 0, 0, 0, 0, 31, 139, 8, 0, 0,
+        0, 0, 0, 0, 255, 99, 80, 228, 99, 0, 0, 69, 222, 72, 134, 4, 0, 0, 0, 21, 2, 25, 37, 0, 6,
+        25, 24, 8, 112, 111, 115, 105, 116, 105, 111, 110, 21, 4, 22, 2, 22, 84, 22, 124, 38, 202,
+        1, 60, 54, 0, 40, 4, 0, 33, 14, 0, 24, 4, 0, 33, 14, 0, 0, 0, 21, 6, 21, 30, 21, 70, 92,
+        21, 2, 21, 0, 21, 2, 21, 0, 21, 4, 21, 4, 17, 28, 54, 0, 40, 7, 49, 48, 49, 57, 51, 57, 55,
+        24, 7, 49, 48, 49, 57, 51, 57, 55, 0, 0, 0, 3, 0, 3, 1, 31, 139, 8, 0, 0, 0, 0, 0, 0, 255,
+        99, 103, 96, 96, 48, 52, 48, 180, 52, 182, 52, 7, 0, 69, 88, 164, 201, 11, 0, 0, 0, 21, 12,
+        25, 37, 0, 6, 25, 56, 10, 105, 100, 101, 110, 116, 105, 102, 105, 101, 114, 4, 108, 105,
+        115, 116, 2, 105, 100, 21, 4, 22, 2, 22, 118, 22, 158, 1, 38, 160, 3, 60, 54, 0, 40, 7, 49,
+        48, 49, 57, 51, 57, 55, 24, 7, 49, 48, 49, 57, 51, 57, 55, 0, 0, 21, 6, 21, 10, 21, 50, 92,
+        21, 2, 21, 0, 21, 2, 21, 0, 21, 0, 21, 0, 17, 28, 54, 0, 40, 1, 71, 24, 1, 71, 0, 0, 0, 31,
+        139, 8, 0, 0, 0, 0, 0, 0, 255, 99, 100, 96, 96, 112, 7, 0, 158, 10, 250, 19, 5, 0, 0, 0,
+        21, 12, 25, 37, 0, 6, 25, 24, 9, 114, 101, 102, 101, 114, 101, 110, 99, 101, 21, 4, 22, 2,
+        22, 74, 22, 114, 38, 186, 5, 60, 54, 0, 40, 1, 71, 24, 1, 71, 0, 0, 21, 6, 21, 10, 21, 50,
+        92, 21, 2, 21, 0, 21, 2, 21, 0, 21, 0, 21, 0, 17, 28, 54, 0, 40, 1, 65, 24, 1, 65, 0, 0, 0,
+        31, 139, 8, 0, 0, 0, 0, 0, 0, 255, 99, 100, 96, 96, 112, 4, 0, 171, 175, 153, 250, 5, 0, 0,
+        0, 21, 12, 25, 37, 0, 6, 25, 24, 9, 97, 108, 116, 101, 114, 110, 97, 116, 101, 21, 4, 22,
+        2, 22, 74, 22, 114, 38, 252, 6, 60, 54, 0, 40, 1, 65, 24, 1, 65, 0, 0, 21, 6, 21, 4, 21,
+        44, 92, 21, 2, 21, 2, 21, 2, 21, 0, 21, 4, 21, 0, 17, 28, 54, 2, 0, 0, 0, 3, 0, 31, 139, 8,
+        0, 0, 0, 0, 0, 0, 255, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 8, 25, 37, 0, 6, 25, 24, 7, 113,
+        117, 97, 108, 105, 116, 121, 21, 4, 22, 2, 22, 56, 22, 96, 38, 190, 8, 60, 54, 2, 0, 0, 21,
+        6, 21, 8, 21, 48, 92, 21, 2, 21, 0, 21, 2, 21, 0, 21, 4, 21, 4, 17, 28, 54, 0, 0, 0, 0, 3,
+        0, 3, 0, 31, 139, 8, 0, 0, 0, 0, 0, 0, 255, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 12, 25, 37,
+        0, 6, 25, 56, 6, 102, 105, 108, 116, 101, 114, 4, 108, 105, 115, 116, 6, 102, 105, 108,
+        116, 101, 114, 21, 4, 22, 2, 22, 60, 22, 100, 38, 222, 9, 60, 54, 0, 0, 0, 21, 12, 25, 5,
+        25, 24, 10, 99, 104, 114, 111, 109, 111, 115, 111, 109, 101, 21, 0, 22, 0, 22, 0, 22, 0,
+        38, 0, 0, 21, 2, 25, 5, 25, 24, 8, 112, 111, 115, 105, 116, 105, 111, 110, 21, 0, 22, 0,
+        22, 0, 22, 0, 38, 0, 0, 21, 12, 25, 5, 25, 56, 10, 105, 100, 101, 110, 116, 105, 102, 105,
+        101, 114, 4, 108, 105, 115, 116, 2, 105, 100, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 21, 12,
+        25, 5, 25, 24, 9, 114, 101, 102, 101, 114, 101, 110, 99, 101, 21, 0, 22, 0, 22, 0, 22, 0,
+        38, 0, 0, 21, 12, 25, 5, 25, 24, 9, 97, 108, 116, 101, 114, 110, 97, 116, 101, 21, 0, 22,
+        0, 22, 0, 22, 0, 38, 0, 0, 21, 8, 25, 5, 25, 24, 7, 113, 117, 97, 108, 105, 116, 121, 21,
+        0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 21, 12, 25, 5, 25, 56, 6, 102, 105, 108, 116, 101, 114,
+        4, 108, 105, 115, 116, 6, 102, 105, 108, 116, 101, 114, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0,
+        0, 25, 17, 2, 25, 24, 1, 49, 25, 24, 1, 49, 21, 0, 25, 22, 0, 0, 25, 17, 2, 25, 24, 4, 0,
+        33, 14, 0, 25, 24, 4, 0, 33, 14, 0, 21, 0, 25, 22, 0, 0, 25, 17, 2, 25, 24, 7, 49, 48, 49,
+        57, 51, 57, 55, 25, 24, 7, 49, 48, 49, 57, 51, 57, 55, 21, 0, 25, 22, 0, 0, 25, 17, 2, 25,
+        24, 1, 71, 25, 24, 1, 71, 21, 0, 25, 22, 0, 0, 25, 17, 2, 25, 24, 1, 65, 25, 24, 1, 65, 21,
+        0, 25, 22, 0, 0, 25, 17, 1, 25, 24, 1, 0, 25, 24, 1, 0, 21, 0, 25, 22, 2, 0, 25, 17, 1, 25,
+        24, 1, 0, 25, 24, 1, 0, 21, 0, 25, 22, 0, 0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 1,
+        25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 1, 25, 8, 25, 8,
+        21, 0, 25, 6, 0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6,
+        0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 28, 22, 8, 21, 114, 22, 0, 0, 0, 25, 28, 22,
+        202, 1, 21, 124, 22, 0, 0, 0, 25, 28, 22, 160, 3, 21, 158, 1, 22, 0, 0, 0, 25, 28, 22, 186,
+        5, 21, 114, 22, 0, 0, 0, 25, 28, 22, 252, 6, 21, 114, 22, 0, 0, 0, 25, 28, 22, 190, 8, 21,
+        96, 22, 0, 0, 0, 25, 28, 22, 222, 9, 21, 100, 22, 0, 0, 0, 25, 12, 0, 25, 12, 0, 25, 12, 0,
+        25, 12, 0, 25, 12, 0, 25, 12, 0, 25, 12, 0, 21, 4, 25, 204, 72, 4, 114, 111, 111, 116, 21,
+        14, 0, 21, 12, 37, 0, 24, 10, 99, 104, 114, 111, 109, 111, 115, 111, 109, 101, 37, 0, 76,
+        28, 0, 0, 0, 21, 2, 37, 0, 24, 8, 112, 111, 115, 105, 116, 105, 111, 110, 0, 53, 0, 24, 10,
+        105, 100, 101, 110, 116, 105, 102, 105, 101, 114, 21, 2, 21, 6, 76, 60, 0, 0, 0, 53, 4, 24,
+        4, 108, 105, 115, 116, 21, 2, 0, 21, 12, 37, 0, 24, 2, 105, 100, 37, 0, 76, 28, 0, 0, 0,
+        21, 12, 37, 0, 24, 9, 114, 101, 102, 101, 114, 101, 110, 99, 101, 37, 0, 76, 28, 0, 0, 0,
+        21, 12, 37, 0, 24, 9, 97, 108, 116, 101, 114, 110, 97, 116, 101, 37, 0, 76, 28, 0, 0, 0,
+        21, 8, 37, 2, 24, 7, 113, 117, 97, 108, 105, 116, 121, 0, 53, 0, 24, 6, 102, 105, 108, 116,
+        101, 114, 21, 2, 21, 6, 76, 60, 0, 0, 0, 53, 4, 24, 4, 108, 105, 115, 116, 21, 2, 0, 21,
+        12, 37, 0, 24, 6, 102, 105, 108, 116, 101, 114, 37, 0, 76, 28, 0, 0, 0, 22, 2, 25, 44, 25,
+        124, 38, 122, 28, 21, 12, 25, 37, 0, 6, 25, 24, 10, 99, 104, 114, 111, 109, 111, 115, 111,
+        109, 101, 21, 4, 22, 2, 22, 74, 22, 114, 38, 8, 60, 54, 0, 40, 1, 49, 24, 1, 49, 0, 0, 22,
+        222, 17, 21, 20, 22, 178, 14, 21, 34, 0, 38, 198, 2, 28, 21, 2, 25, 37, 0, 6, 25, 24, 8,
+        112, 111, 115, 105, 116, 105, 111, 110, 21, 4, 22, 2, 22, 84, 22, 124, 38, 202, 1, 60, 54,
+        0, 40, 4, 0, 33, 14, 0, 24, 4, 0, 33, 14, 0, 0, 0, 22, 242, 17, 21, 22, 22, 212, 14, 21,
+        46, 0, 38, 190, 4, 28, 21, 12, 25, 37, 0, 6, 25, 56, 10, 105, 100, 101, 110, 116, 105, 102,
+        105, 101, 114, 4, 108, 105, 115, 116, 2, 105, 100, 21, 4, 22, 2, 22, 118, 22, 158, 1, 38,
+        160, 3, 60, 54, 0, 40, 7, 49, 48, 49, 57, 51, 57, 55, 24, 7, 49, 48, 49, 57, 51, 57, 55, 0,
+        0, 22, 136, 18, 21, 24, 22, 130, 15, 21, 58, 0, 38, 172, 6, 28, 21, 12, 25, 37, 0, 6, 25,
+        24, 9, 114, 101, 102, 101, 114, 101, 110, 99, 101, 21, 4, 22, 2, 22, 74, 22, 114, 38, 186,
+        5, 60, 54, 0, 40, 1, 71, 24, 1, 71, 0, 0, 22, 160, 18, 21, 22, 22, 188, 15, 21, 34, 0, 38,
+        238, 7, 28, 21, 12, 25, 37, 0, 6, 25, 24, 9, 97, 108, 116, 101, 114, 110, 97, 116, 101, 21,
+        4, 22, 2, 22, 74, 22, 114, 38, 252, 6, 60, 54, 0, 40, 1, 65, 24, 1, 65, 0, 0, 22, 182, 18,
+        21, 22, 22, 222, 15, 21, 34, 0, 38, 158, 9, 28, 21, 8, 25, 37, 0, 6, 25, 24, 7, 113, 117,
+        97, 108, 105, 116, 121, 21, 4, 22, 2, 22, 56, 22, 96, 38, 190, 8, 60, 54, 2, 0, 0, 22, 204,
+        18, 21, 22, 22, 128, 16, 21, 34, 0, 38, 194, 10, 28, 21, 12, 25, 37, 0, 6, 25, 56, 6, 102,
+        105, 108, 116, 101, 114, 4, 108, 105, 115, 116, 6, 102, 105, 108, 116, 101, 114, 21, 4, 22,
+        2, 22, 60, 22, 100, 38, 222, 9, 60, 54, 0, 0, 0, 22, 226, 18, 21, 22, 22, 162, 16, 21, 34,
+        0, 22, 156, 4, 22, 2, 38, 8, 22, 180, 6, 20, 0, 0, 25, 124, 38, 0, 28, 21, 12, 25, 5, 25,
+        24, 10, 99, 104, 114, 111, 109, 111, 115, 111, 109, 101, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0,
+        0, 22, 248, 18, 21, 6, 22, 196, 16, 21, 22, 0, 38, 0, 28, 21, 2, 25, 5, 25, 24, 8, 112,
+        111, 115, 105, 116, 105, 111, 110, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 254, 18, 21,
+        6, 22, 218, 16, 21, 22, 0, 38, 0, 28, 21, 12, 25, 5, 25, 56, 10, 105, 100, 101, 110, 116,
+        105, 102, 105, 101, 114, 4, 108, 105, 115, 116, 2, 105, 100, 21, 0, 22, 0, 22, 0, 22, 0,
+        38, 0, 0, 22, 132, 19, 21, 6, 22, 240, 16, 21, 22, 0, 38, 0, 28, 21, 12, 25, 5, 25, 24, 9,
+        114, 101, 102, 101, 114, 101, 110, 99, 101, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 138,
+        19, 21, 6, 22, 134, 17, 21, 22, 0, 38, 0, 28, 21, 12, 25, 5, 25, 24, 9, 97, 108, 116, 101,
+        114, 110, 97, 116, 101, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 144, 19, 21, 6, 22, 156,
+        17, 21, 22, 0, 38, 0, 28, 21, 8, 25, 5, 25, 24, 7, 113, 117, 97, 108, 105, 116, 121, 21, 0,
+        22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 150, 19, 21, 6, 22, 178, 17, 21, 22, 0, 38, 0, 28, 21,
+        12, 25, 5, 25, 56, 6, 102, 105, 108, 116, 101, 114, 4, 108, 105, 115, 116, 6, 102, 105,
+        108, 116, 101, 114, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 156, 19, 21, 6, 22, 200, 17,
+        21, 22, 0, 22, 0, 22, 0, 38, 0, 22, 0, 20, 2, 0, 25, 28, 24, 12, 65, 82, 82, 79, 87, 58,
+        115, 99, 104, 101, 109, 97, 24, 244, 6, 47, 47, 47, 47, 47, 52, 56, 67, 65, 65, 65, 69, 65,
+        65, 65, 65, 56, 118, 47, 47, 47, 120, 81, 65, 65, 65, 65, 69, 65, 65, 69, 65, 65, 65, 65,
+        75, 65, 65, 115, 65, 67, 65, 65, 75, 65, 65, 81, 65, 43, 80, 47, 47, 47, 119, 119, 65, 65,
+        65, 65, 73, 65, 65, 103, 65, 65, 65, 65, 69, 65, 65, 99, 65, 65, 65, 65, 103, 65, 103, 65,
+        65, 48, 65, 69, 65, 65, 70, 65, 66, 65, 65, 65, 77, 65, 81, 65, 65, 121, 65, 65, 65, 65,
+        73, 81, 65, 65, 65, 65, 69, 65, 65, 65, 65, 55, 80, 47, 47, 47, 50, 119, 65, 65, 65, 66,
+        103, 65, 65, 65, 65, 71, 65, 65, 65, 65, 65, 119, 65, 65, 65, 65, 81, 65, 66, 69, 65, 66,
+        65, 65, 65, 65, 66, 65, 65, 67, 65, 65, 65, 65, 65, 119, 65, 65, 81, 65, 65, 65, 65, 81,
+        65, 65, 65, 68, 115, 47, 47, 47, 47, 76, 65, 65, 65, 65, 67, 65, 65, 65, 65, 65, 89, 65,
+        65, 65, 65, 66, 81, 65, 65, 65, 66, 65, 65, 69, 81, 65, 69, 65, 65, 65, 65, 69, 65, 65, 73,
+        65, 65, 65, 65, 68, 65, 65, 65, 65, 65, 65, 65, 47, 80, 47, 47, 47, 119, 81, 65, 66, 65,
+        65, 71, 65, 65, 65, 65, 90, 109, 108, 115, 100, 71, 86, 121, 65, 65, 68, 56, 47, 47, 47,
+        47, 66, 65, 65, 69, 65, 65, 89, 65, 65, 65, 66, 109, 97, 87, 120, 48, 90, 88, 73, 65, 65,
+        79, 122, 47, 47, 47, 56, 119, 65, 65, 65, 65, 73, 65, 65, 65, 65, 66, 103, 65, 65, 65, 65,
+        66, 65, 119, 65, 65, 69, 65, 65, 83, 65, 65, 81, 65, 69, 65, 65, 82, 65, 65, 103, 65, 65,
+        65, 65, 77, 65, 65, 65, 65, 65, 65, 68, 54, 47, 47, 47, 47, 65, 81, 65, 71, 65, 65, 89, 65,
+        66, 65, 65, 72, 65, 65, 65, 65, 99, 88, 86, 104, 98, 71, 108, 48, 101, 81, 68, 115, 47, 47,
+        47, 47, 76, 65, 65, 65, 65, 67, 65, 65, 65, 65, 65, 89, 65, 65, 65, 65, 66, 81, 65, 65, 65,
+        66, 65, 65, 69, 81, 65, 69, 65, 65, 65, 65, 69, 65, 65, 73, 65, 65, 65, 65, 68, 65, 65, 65,
+        65, 65, 65, 65, 47, 80, 47, 47, 47, 119, 81, 65, 66, 65, 65, 74, 65, 65, 65, 65, 89, 87,
+        120, 48, 90, 88, 74, 117, 89, 88, 82, 108, 65, 65, 65, 65, 55, 80, 47, 47, 47, 121, 119,
+        65, 65, 65, 65, 103, 65, 65, 65, 65, 71, 65, 65, 65, 65, 65, 85, 65, 65, 65, 65, 81, 65,
+        66, 69, 65, 66, 65, 65, 65, 65, 66, 65, 65, 67, 65, 65, 65, 65, 65, 119, 65, 65, 65, 65,
+        65, 65, 80, 122, 47, 47, 47, 56, 69, 65, 65, 81, 65, 67, 81, 65, 65, 65, 72, 74, 108, 90,
+        109, 86, 121, 90, 87, 53, 106, 90, 81, 65, 65, 65, 79, 122, 47, 47, 47, 57, 111, 65, 65,
+        65, 65, 88, 65, 65, 65, 65, 66, 103, 65, 65, 65, 65, 77, 65, 65, 65, 65, 69, 65, 65, 82,
+        65, 65, 81, 65, 65, 65, 65, 81, 65, 65, 103, 65, 65, 65, 65, 77, 65, 65, 69, 65, 65, 65,
+        65, 69, 65, 65, 65, 65, 55, 80, 47, 47, 47, 121, 119, 65, 65, 65, 65, 103, 65, 65, 65, 65,
+        71, 65, 65, 65, 65, 65, 85, 65, 65, 65, 65, 81, 65, 66, 69, 65, 66, 65, 65, 65, 65, 66, 65,
+        65, 67, 65, 65, 65, 65, 65, 119, 65, 65, 65, 65, 65, 65, 80, 122, 47, 47, 47, 56, 69, 65,
+        65, 81, 65, 65, 103, 65, 65, 65, 71, 108, 107, 65, 65, 68, 56, 47, 47, 47, 47, 66, 65, 65,
+        69, 65, 65, 111, 65, 65, 65, 66, 112, 90, 71, 86, 117, 100, 71, 108, 109, 97, 87, 86, 121,
+        65, 65, 68, 115, 47, 47, 47, 47, 79, 65, 65, 65, 65, 67, 65, 65, 65, 65, 65, 89, 65, 65,
+        65, 65, 65, 103, 65, 65, 65, 66, 65, 65, 69, 81, 65, 69, 65, 65, 65, 65, 69, 65, 65, 73,
+        65, 65, 65, 65, 68, 65, 65, 65, 65, 65, 65, 65, 57, 80, 47, 47, 47, 121, 65, 65, 65, 65,
+        65, 66, 65, 65, 65, 65, 67, 65, 65, 74, 65, 65, 81, 65, 67, 65, 65, 73, 65, 65, 65, 65, 99,
+        71, 57, 122, 97, 88, 82, 112, 98, 50, 52, 65, 65, 65, 65, 65, 55, 80, 47, 47, 47, 121, 119,
+        65, 65, 65, 65, 103, 65, 65, 65, 65, 71, 65, 65, 65, 65, 65, 85, 65, 65, 65, 65, 81, 65,
+        66, 69, 65, 66, 65, 65, 65, 65, 66, 65, 65, 67, 65, 65, 65, 65, 65, 119, 65, 65, 65, 65,
+        65, 65, 80, 122, 47, 47, 47, 56, 69, 65, 65, 81, 65, 67, 103, 65, 65, 65, 71, 78, 111, 99,
+        109, 57, 116, 98, 51, 78, 118, 98, 87, 85, 65, 0, 24, 44, 65, 114, 114, 111, 119, 50, 32,
+        45, 32, 78, 97, 116, 105, 118, 101, 32, 82, 117, 115, 116, 32, 105, 109, 112, 108, 101,
+        109, 101, 110, 116, 97, 116, 105, 111, 110, 32, 111, 102, 32, 65, 114, 114, 111, 119, 0,
+        107, 7, 0, 0, 80, 65, 82, 49,
+    ];
+
+    #[test]
+    fn convert_positives() {
+        let mut input = std::io::BufReader::new(&*VCF_FILE);
+        let mut output = Vec::new();
+
+        vcf2parquet(
+            &mut input,
+            &mut output,
+            1,
+            arrow2::io::parquet::write::CompressionOptions::Gzip(None),
+            false,
+        )
+        .unwrap();
+        assert_eq!(output, *PARQUET_FILE);
+    }
+
+    #[test]
+    fn not_a_vcf() {
+        let raw_data = [b'#', b'a', b'b', b'c', 255, 0x7F, b'\n'].to_vec();
+        let mut input = std::io::BufReader::new(&raw_data[..]);
+        let mut output = Vec::new();
+
+        let result = vcf2parquet(
+            &mut input,
+            &mut output,
+            1,
+            arrow2::io::parquet::write::CompressionOptions::Gzip(None),
+            false,
+        );
+
+        assert!(result.is_err());
+    }
+
+    #[test]
+    fn multi_positives() {
+        let mut input = std::io::BufReader::new(&*VCF_FILE);
+        let dir = tempfile::tempdir().unwrap();
+
+        let format = dir
+            .path()
+            .join("test_{}.parquet")
+            .as_os_str()
+            .to_str()
+            .unwrap()
+            .to_string();
+
+        vcf2multiparquet(
+            &mut input,
+            &format,
+            1,
+            arrow2::io::parquet::write::CompressionOptions::Gzip(None),
+            false,
+        )
+        .unwrap();
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 5d6b6e8..efe6894 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,57 @@
-#[cfg(feature = "bin")]
-pub use vcf2parquet_bin::{error, main as bin_main};
+//! vcf2parquet bin
+
+/* std use */
+
+/* crate use */
+use clap::Parser as _;
+
+/* project use */
+use vcf2parquet::cli;
+use vcf2parquet::error;
+
+/* mod section */
 
 pub fn main() -> error::Result<()> {
-    bin_main()
+    let params = cli::Command::parse();
+
+    match params.subcommand() {
+        cli::SubCommand::Convert(subparams) => convert(&params, subparams),
+        cli::SubCommand::Split(subparams) => split(&params, subparams),
+    }
+}
+
+fn convert(params: &cli::Command, subparams: &cli::Convert) -> error::Result<()> {
+    let mut reader = std::fs::File::open(params.input())
+        .map(Box::new)
+        .map(|x| niffler::get_reader(x))?
+        .map(|(file, _)| std::io::BufReader::with_capacity(params.read_buffer(), file))?;
+
+    let mut output = std::fs::File::create(subparams.output())?;
+
+    vcf2parquet::vcf2parquet(
+        &mut reader,
+        &mut output,
+        params.batch_size(),
+        params.compression(),
+        params.info_optional(),
+    )?;
+
+    Ok(())
+}
+
+fn split(params: &cli::Command, subparams: &cli::Split) -> error::Result<()> {
+    let mut reader = std::fs::File::open(params.input())
+        .map(Box::new)
+        .map(|x| niffler::get_reader(x))?
+        .map(|(file, _)| std::io::BufReader::with_capacity(params.read_buffer(), file))?;
+
+    vcf2parquet::vcf2multiparquet(
+        &mut reader,
+        subparams.format(),
+        params.batch_size(),
+        params.compression(),
+        params.info_optional(),
+    )?;
+
+    Ok(())
 }
diff --git a/vcf2parquet-lib/src/name2data.rs b/src/name2data.rs
similarity index 100%
rename from vcf2parquet-lib/src/name2data.rs
rename to src/name2data.rs
diff --git a/vcf2parquet-lib/src/record2chunk.rs b/src/record2chunk.rs
similarity index 100%
rename from vcf2parquet-lib/src/record2chunk.rs
rename to src/record2chunk.rs
diff --git a/vcf2parquet-lib/src/schema.rs b/src/schema.rs
similarity index 100%
rename from vcf2parquet-lib/src/schema.rs
rename to src/schema.rs
diff --git a/tests/functional.rs b/tests/functional.rs
index 1f0024f..6114244 100644
--- a/tests/functional.rs
+++ b/tests/functional.rs
@@ -14,7 +14,27 @@ fn help() -> Result<(), assert_cmd::cargo::CargoError> {
 
     cmd.args(["-h"]);
 
-    let truth: &[u8] = b"Convert a vcf in parquet
+    let truth: &[u8] = if cfg!(windows) {
+        b"Convert a vcf in parquet
+
+Usage: vcf2parquet.exe [OPTIONS] --input <INPUT> <COMMAND>
+
+Commands:
+  convert  Convert a vcf in a parquet
+  split    Convert a vcf in multiple parquet file each file contains `batch_size` record
+  help     Print this message or the help of the given subcommand(s)
+
+Options:
+  -i, --input <INPUT>              Input path
+  -b, --batch-size <BATCH_SIZE>    Batch size (default 100,000)
+  -c, --compression <COMPRESSION>  Compression method (default snappy) [possible values: uncompressed, snappy, gzip, lzo, brotli, lz4, zstd]
+  -r, --read-buffer <READ_BUFFER>  Read buffer size in bytes (default 8192)
+  -I, --info-optional              All information fields are optional
+  -h, --help                       Print help (see more with '--help')
+  -V, --version                    Print version
+"
+    } else {
+        b"Convert a vcf in parquet
 
 Usage: vcf2parquet [OPTIONS] --input <INPUT> <COMMAND>
 
@@ -29,9 +49,10 @@ Options:
   -c, --compression <COMPRESSION>  Compression method (default snappy) [possible values: uncompressed, snappy, gzip, lzo, brotli, lz4, zstd]
   -r, --read-buffer <READ_BUFFER>  Read buffer size in bytes (default 8192)
   -I, --info-optional              All information fields are optional
-  -h, --help                       Print help
+  -h, --help                       Print help (see more with '--help')
   -V, --version                    Print version
-";
+"
+    };
 
     let assert = cmd.assert();
 
diff --git a/vcf2parquet-bin/Cargo.toml b/vcf2parquet-bin/Cargo.toml
deleted file mode 100644
index f9f92ec..0000000
--- a/vcf2parquet-bin/Cargo.toml
+++ /dev/null
@@ -1,18 +0,0 @@
-[package]
-name = "vcf2parquet-bin"
-version = "0.6.0"
-edition = "2021"
-
-[dependencies]
-vcf2parquet-lib = { path = "../vcf2parquet-lib", version = "0.6.0" }
-niffler         = { version = "2" }
-arrow2          = { version = "0.18", features = ["io_parquet", "io_parquet_compression"] }
-
-# logging management
-simplelog       = { version = "0.12" }
-
-# error management
-thiserror       = { version = "1" }
-
-# cli management
-clap            = { version = "4", features = ["derive"] }
diff --git a/vcf2parquet-bin/src/error.rs b/vcf2parquet-bin/src/error.rs
deleted file mode 100644
index 921c1ae..0000000
--- a/vcf2parquet-bin/src/error.rs
+++ /dev/null
@@ -1,80 +0,0 @@
-//! error of vcf2parquet-bin
-
-/* std use */
-
-/* crate use */
-
-/* project use */
-
-#[derive(thiserror::Error, std::fmt::Debug)]
-pub enum Error {
-    /// Io error
-    #[error(transparent)]
-    Io { error: std::io::Error },
-
-    /// Niffler error
-    #[error(transparent)]
-    Niffler { error: niffler::Error },
-
-    /// vcf2parquet-lib error
-    #[error(transparent)]
-    Lib {
-        error: vcf2parquet_lib::error::Error,
-    },
-}
-
-pub fn mapping<E>(error: E) -> Error
-where
-    E: std::convert::Into<Error>,
-{
-    error.into()
-}
-
-impl From<std::io::Error> for Error {
-    fn from(error: std::io::Error) -> Self {
-        Error::Io { error }
-    }
-}
-
-impl From<niffler::Error> for Error {
-    fn from(error: niffler::Error) -> Self {
-        Error::Niffler { error }
-    }
-}
-
-impl From<vcf2parquet_lib::error::Error> for Error {
-    fn from(error: vcf2parquet_lib::error::Error) -> Self {
-        Error::Lib { error }
-    }
-}
-
-pub type Result<T> = std::result::Result<T, Error>;
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn error_conversion() {
-        assert_eq!(
-            format!(
-                "{:?}",
-                Error::from(std::io::Error::new(std::io::ErrorKind::NotFound, "test"))
-            ),
-            "Io { error: Custom { kind: NotFound, error: \"test\" } }".to_string()
-        );
-
-        assert_eq!(
-            format!("{:?}", Error::from(niffler::Error::FileTooShort)),
-            "Niffler { error: FileTooShort }".to_string()
-        );
-
-        assert_eq!(
-            format!(
-                "{:?}",
-                Error::from(vcf2parquet_lib::error::Error::NoConversion)
-            ),
-            "Lib { error: NoConversion }".to_string()
-        );
-    }
-}
diff --git a/vcf2parquet-bin/src/lib.rs b/vcf2parquet-bin/src/lib.rs
deleted file mode 100644
index 8d49bf8..0000000
--- a/vcf2parquet-bin/src/lib.rs
+++ /dev/null
@@ -1,64 +0,0 @@
-//! vcf2parquet bin
-
-/* std use */
-
-/* crate use */
-use clap::Parser as _;
-
-/* project use */
-use vcf2parquet_lib as lib;
-
-/* mod section */
-pub mod cli;
-pub mod error;
-
-pub fn main() -> error::Result<()> {
-    let params = cli::Command::parse();
-
-    match params.subcommand() {
-        cli::SubCommand::Convert(subparams) => convert(&params, subparams),
-        cli::SubCommand::Split(subparams) => split(&params, subparams),
-    }
-}
-
-fn convert(params: &cli::Command, subparams: &cli::Convert) -> error::Result<()> {
-    let mut reader = std::fs::File::open(params.input())
-        .map_err(error::mapping)
-        .map(Box::new)
-        .map(|x| niffler::get_reader(x))
-        .map_err(error::mapping)?
-        .map(|(file, _)| std::io::BufReader::with_capacity(params.read_buffer(), file))?;
-
-    let mut output = std::fs::File::create(subparams.output()).map_err(error::mapping)?;
-
-    lib::vcf2parquet(
-        &mut reader,
-        &mut output,
-        params.batch_size(),
-        params.compression(),
-        params.info_optional(),
-    )
-    .map_err(error::mapping)?;
-
-    Ok(())
-}
-
-fn split(params: &cli::Command, subparams: &cli::Split) -> error::Result<()> {
-    let mut reader = std::fs::File::open(params.input())
-        .map_err(error::mapping)
-        .map(Box::new)
-        .map(|x| niffler::get_reader(x))
-        .map_err(error::mapping)?
-        .map(|(file, _)| std::io::BufReader::with_capacity(params.read_buffer(), file))?;
-
-    lib::vcf2multiparquet(
-        &mut reader,
-        subparams.format(),
-        params.batch_size(),
-        params.compression(),
-        params.info_optional(),
-    )
-    .map_err(error::mapping)?;
-
-    Ok(())
-}
diff --git a/vcf2parquet-lib/Cargo.toml b/vcf2parquet-lib/Cargo.toml
deleted file mode 100644
index 221788c..0000000
--- a/vcf2parquet-lib/Cargo.toml
+++ /dev/null
@@ -1,21 +0,0 @@
-[package]
-name = "vcf2parquet-lib"
-version = "0.6.0"
-edition = "2021"
-
-[dependencies]
-rayon      = { version = "1" }
-
-# input output management
-niffler     = { version = "2" }
-noodles     = { version = "0.64", features = ["vcf"] }
-arrow2      = { version = "0.18", features = ["io_parquet", "io_parquet_compression"] }
-rustc-hash  = { version = "1" }
-
-# logging and error management
-log         = { version = "0.4" }
-thiserror   = { version = "1" }
-
-[dev-dependencies]
-lazy_static = { version = "1" }
-tempfile    = { version = "3" }
\ No newline at end of file
diff --git a/vcf2parquet-lib/src/lib.rs b/vcf2parquet-lib/src/lib.rs
deleted file mode 100644
index e89c1f6..0000000
--- a/vcf2parquet-lib/src/lib.rs
+++ /dev/null
@@ -1,327 +0,0 @@
-//! vcf2parquet library
-
-/* std use */
-
-/* crate use */
-
-/* project use */
-
-/* mod section */
-pub mod error;
-pub mod name2data;
-pub mod record2chunk;
-pub mod schema;
-
-/// Read `input` vcf and write parquet in `output`
-pub fn vcf2parquet<R, W>(
-    input: &mut R,
-    output: &mut W,
-    batch_size: usize,
-    compression: arrow2::io::parquet::write::CompressionOptions,
-    info_optional: bool,
-) -> error::Result<()>
-where
-    R: std::io::BufRead,
-    W: std::io::Write,
-{
-    // VCF section
-    let mut reader = noodles::vcf::Reader::new(input);
-
-    let vcf_header: noodles::vcf::Header = reader.read_header()?;
-
-    // Parquet section
-    let schema = schema::from_header(&vcf_header, info_optional)?;
-
-    let mut iterator = reader.records(&vcf_header);
-    let chunk_iterator = record2chunk::Record2Chunk::new(
-        &mut iterator,
-        batch_size,
-        vcf_header.clone(),
-        schema.clone(),
-    );
-
-    let options = arrow2::io::parquet::write::WriteOptions {
-        write_statistics: true,
-        compression,
-        version: arrow2::io::parquet::write::Version::V2,
-        data_pagesize_limit: Some(batch_size),
-    };
-
-    let encodings = chunk_iterator.encodings();
-    let row_groups = arrow2::io::parquet::write::RowGroupIterator::try_new(
-        chunk_iterator,
-        &schema,
-        options,
-        encodings,
-    )?;
-
-    let mut writer = arrow2::io::parquet::write::FileWriter::try_new(output, schema, options)?;
-
-    for group in row_groups {
-        writer.write(group?)?;
-    }
-    let _ = writer.end(None)?;
-
-    Ok(())
-}
-
-/// Read `input` vcf and write each row group in a parquet file match with template
-pub fn vcf2multiparquet<R>(
-    input: &mut R,
-    template: &str,
-    batch_size: usize,
-    compression: arrow2::io::parquet::write::CompressionOptions,
-    info_optional: bool,
-) -> error::Result<()>
-where
-    R: std::io::BufRead,
-{
-    // VCF section
-    let mut reader = noodles::vcf::Reader::new(input);
-
-    let vcf_header: noodles::vcf::Header = reader.read_header()?;
-
-    // Parquet section
-    let schema = schema::from_header(&vcf_header, info_optional)?;
-
-    let mut iterator = reader.records(&vcf_header);
-    let chunk_iterator = record2chunk::Record2Chunk::new(
-        &mut iterator,
-        batch_size,
-        vcf_header.clone(),
-        schema.clone(),
-    );
-
-    let options = arrow2::io::parquet::write::WriteOptions {
-        write_statistics: true,
-        compression,
-        version: arrow2::io::parquet::write::Version::V2,
-        data_pagesize_limit: Some(batch_size),
-    };
-
-    let encodings = chunk_iterator.encodings();
-    let row_groups = arrow2::io::parquet::write::RowGroupIterator::try_new(
-        chunk_iterator,
-        &schema,
-        options,
-        encodings,
-    )?;
-
-    for (index, group) in row_groups.enumerate() {
-        let output = std::fs::File::create(template.replace("{}", &index.to_string()))?;
-        let mut writer =
-            arrow2::io::parquet::write::FileWriter::try_new(output, schema.clone(), options)?;
-
-        writer.write(group?)?;
-        writer.end(None)?;
-    }
-
-    Ok(())
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    static VCF_FILE: &[u8] = b"##fileformat=VCFv4.3
-#CHROM\tPOS\tID\tREF\tALT\tQUAL\tFILTER\tINFO
-1\t925952\t1019397\tG\tA\t.\t.\t.
-";
-
-    static PARQUET_FILE: &[u8] = &[
-        80, 65, 82, 49, 21, 6, 21, 10, 21, 50, 92, 21, 2, 21, 0, 21, 2, 21, 0, 21, 0, 21, 0, 17,
-        28, 54, 0, 40, 1, 49, 24, 1, 49, 0, 0, 0, 31, 139, 8, 0, 0, 0, 0, 0, 0, 255, 99, 100, 96,
-        96, 48, 4, 0, 151, 222, 156, 170, 5, 0, 0, 0, 21, 12, 25, 37, 0, 6, 25, 24, 10, 99, 104,
-        114, 111, 109, 111, 115, 111, 109, 101, 21, 4, 22, 2, 22, 74, 22, 114, 38, 8, 60, 54, 0,
-        40, 1, 49, 24, 1, 49, 0, 0, 21, 6, 21, 8, 21, 48, 92, 21, 2, 21, 0, 21, 2, 21, 0, 21, 0,
-        21, 0, 17, 28, 54, 0, 40, 4, 0, 33, 14, 0, 24, 4, 0, 33, 14, 0, 0, 0, 0, 31, 139, 8, 0, 0,
-        0, 0, 0, 0, 255, 99, 80, 228, 99, 0, 0, 69, 222, 72, 134, 4, 0, 0, 0, 21, 2, 25, 37, 0, 6,
-        25, 24, 8, 112, 111, 115, 105, 116, 105, 111, 110, 21, 4, 22, 2, 22, 84, 22, 124, 38, 202,
-        1, 60, 54, 0, 40, 4, 0, 33, 14, 0, 24, 4, 0, 33, 14, 0, 0, 0, 21, 6, 21, 30, 21, 70, 92,
-        21, 2, 21, 0, 21, 2, 21, 0, 21, 4, 21, 4, 17, 28, 54, 0, 40, 7, 49, 48, 49, 57, 51, 57, 55,
-        24, 7, 49, 48, 49, 57, 51, 57, 55, 0, 0, 0, 3, 0, 3, 1, 31, 139, 8, 0, 0, 0, 0, 0, 0, 255,
-        99, 103, 96, 96, 48, 52, 48, 180, 52, 182, 52, 7, 0, 69, 88, 164, 201, 11, 0, 0, 0, 21, 12,
-        25, 37, 0, 6, 25, 56, 10, 105, 100, 101, 110, 116, 105, 102, 105, 101, 114, 4, 108, 105,
-        115, 116, 2, 105, 100, 21, 4, 22, 2, 22, 118, 22, 158, 1, 38, 160, 3, 60, 54, 0, 40, 7, 49,
-        48, 49, 57, 51, 57, 55, 24, 7, 49, 48, 49, 57, 51, 57, 55, 0, 0, 21, 6, 21, 10, 21, 50, 92,
-        21, 2, 21, 0, 21, 2, 21, 0, 21, 0, 21, 0, 17, 28, 54, 0, 40, 1, 71, 24, 1, 71, 0, 0, 0, 31,
-        139, 8, 0, 0, 0, 0, 0, 0, 255, 99, 100, 96, 96, 112, 7, 0, 158, 10, 250, 19, 5, 0, 0, 0,
-        21, 12, 25, 37, 0, 6, 25, 24, 9, 114, 101, 102, 101, 114, 101, 110, 99, 101, 21, 4, 22, 2,
-        22, 74, 22, 114, 38, 186, 5, 60, 54, 0, 40, 1, 71, 24, 1, 71, 0, 0, 21, 6, 21, 10, 21, 50,
-        92, 21, 2, 21, 0, 21, 2, 21, 0, 21, 0, 21, 0, 17, 28, 54, 0, 40, 1, 65, 24, 1, 65, 0, 0, 0,
-        31, 139, 8, 0, 0, 0, 0, 0, 0, 255, 99, 100, 96, 96, 112, 4, 0, 171, 175, 153, 250, 5, 0, 0,
-        0, 21, 12, 25, 37, 0, 6, 25, 24, 9, 97, 108, 116, 101, 114, 110, 97, 116, 101, 21, 4, 22,
-        2, 22, 74, 22, 114, 38, 252, 6, 60, 54, 0, 40, 1, 65, 24, 1, 65, 0, 0, 21, 6, 21, 4, 21,
-        44, 92, 21, 2, 21, 2, 21, 2, 21, 0, 21, 4, 21, 0, 17, 28, 54, 2, 0, 0, 0, 3, 0, 31, 139, 8,
-        0, 0, 0, 0, 0, 0, 255, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 8, 25, 37, 0, 6, 25, 24, 7, 113,
-        117, 97, 108, 105, 116, 121, 21, 4, 22, 2, 22, 56, 22, 96, 38, 190, 8, 60, 54, 2, 0, 0, 21,
-        6, 21, 8, 21, 48, 92, 21, 2, 21, 0, 21, 2, 21, 0, 21, 4, 21, 4, 17, 28, 54, 0, 0, 0, 0, 3,
-        0, 3, 0, 31, 139, 8, 0, 0, 0, 0, 0, 0, 255, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 21, 12, 25, 37,
-        0, 6, 25, 56, 6, 102, 105, 108, 116, 101, 114, 4, 108, 105, 115, 116, 6, 102, 105, 108,
-        116, 101, 114, 21, 4, 22, 2, 22, 60, 22, 100, 38, 222, 9, 60, 54, 0, 0, 0, 21, 12, 25, 5,
-        25, 24, 10, 99, 104, 114, 111, 109, 111, 115, 111, 109, 101, 21, 0, 22, 0, 22, 0, 22, 0,
-        38, 0, 0, 21, 2, 25, 5, 25, 24, 8, 112, 111, 115, 105, 116, 105, 111, 110, 21, 0, 22, 0,
-        22, 0, 22, 0, 38, 0, 0, 21, 12, 25, 5, 25, 56, 10, 105, 100, 101, 110, 116, 105, 102, 105,
-        101, 114, 4, 108, 105, 115, 116, 2, 105, 100, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 21, 12,
-        25, 5, 25, 24, 9, 114, 101, 102, 101, 114, 101, 110, 99, 101, 21, 0, 22, 0, 22, 0, 22, 0,
-        38, 0, 0, 21, 12, 25, 5, 25, 24, 9, 97, 108, 116, 101, 114, 110, 97, 116, 101, 21, 0, 22,
-        0, 22, 0, 22, 0, 38, 0, 0, 21, 8, 25, 5, 25, 24, 7, 113, 117, 97, 108, 105, 116, 121, 21,
-        0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 21, 12, 25, 5, 25, 56, 6, 102, 105, 108, 116, 101, 114,
-        4, 108, 105, 115, 116, 6, 102, 105, 108, 116, 101, 114, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0,
-        0, 25, 17, 2, 25, 24, 1, 49, 25, 24, 1, 49, 21, 0, 25, 22, 0, 0, 25, 17, 2, 25, 24, 4, 0,
-        33, 14, 0, 25, 24, 4, 0, 33, 14, 0, 21, 0, 25, 22, 0, 0, 25, 17, 2, 25, 24, 7, 49, 48, 49,
-        57, 51, 57, 55, 25, 24, 7, 49, 48, 49, 57, 51, 57, 55, 21, 0, 25, 22, 0, 0, 25, 17, 2, 25,
-        24, 1, 71, 25, 24, 1, 71, 21, 0, 25, 22, 0, 0, 25, 17, 2, 25, 24, 1, 65, 25, 24, 1, 65, 21,
-        0, 25, 22, 0, 0, 25, 17, 1, 25, 24, 1, 0, 25, 24, 1, 0, 21, 0, 25, 22, 2, 0, 25, 17, 1, 25,
-        24, 1, 0, 25, 24, 1, 0, 21, 0, 25, 22, 0, 0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 1,
-        25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 1, 25, 8, 25, 8,
-        21, 0, 25, 6, 0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6,
-        0, 25, 1, 25, 8, 25, 8, 21, 0, 25, 6, 0, 25, 28, 22, 8, 21, 114, 22, 0, 0, 0, 25, 28, 22,
-        202, 1, 21, 124, 22, 0, 0, 0, 25, 28, 22, 160, 3, 21, 158, 1, 22, 0, 0, 0, 25, 28, 22, 186,
-        5, 21, 114, 22, 0, 0, 0, 25, 28, 22, 252, 6, 21, 114, 22, 0, 0, 0, 25, 28, 22, 190, 8, 21,
-        96, 22, 0, 0, 0, 25, 28, 22, 222, 9, 21, 100, 22, 0, 0, 0, 25, 12, 0, 25, 12, 0, 25, 12, 0,
-        25, 12, 0, 25, 12, 0, 25, 12, 0, 25, 12, 0, 21, 4, 25, 204, 72, 4, 114, 111, 111, 116, 21,
-        14, 0, 21, 12, 37, 0, 24, 10, 99, 104, 114, 111, 109, 111, 115, 111, 109, 101, 37, 0, 76,
-        28, 0, 0, 0, 21, 2, 37, 0, 24, 8, 112, 111, 115, 105, 116, 105, 111, 110, 0, 53, 0, 24, 10,
-        105, 100, 101, 110, 116, 105, 102, 105, 101, 114, 21, 2, 21, 6, 76, 60, 0, 0, 0, 53, 4, 24,
-        4, 108, 105, 115, 116, 21, 2, 0, 21, 12, 37, 0, 24, 2, 105, 100, 37, 0, 76, 28, 0, 0, 0,
-        21, 12, 37, 0, 24, 9, 114, 101, 102, 101, 114, 101, 110, 99, 101, 37, 0, 76, 28, 0, 0, 0,
-        21, 12, 37, 0, 24, 9, 97, 108, 116, 101, 114, 110, 97, 116, 101, 37, 0, 76, 28, 0, 0, 0,
-        21, 8, 37, 2, 24, 7, 113, 117, 97, 108, 105, 116, 121, 0, 53, 0, 24, 6, 102, 105, 108, 116,
-        101, 114, 21, 2, 21, 6, 76, 60, 0, 0, 0, 53, 4, 24, 4, 108, 105, 115, 116, 21, 2, 0, 21,
-        12, 37, 0, 24, 6, 102, 105, 108, 116, 101, 114, 37, 0, 76, 28, 0, 0, 0, 22, 2, 25, 44, 25,
-        124, 38, 122, 28, 21, 12, 25, 37, 0, 6, 25, 24, 10, 99, 104, 114, 111, 109, 111, 115, 111,
-        109, 101, 21, 4, 22, 2, 22, 74, 22, 114, 38, 8, 60, 54, 0, 40, 1, 49, 24, 1, 49, 0, 0, 22,
-        222, 17, 21, 20, 22, 178, 14, 21, 34, 0, 38, 198, 2, 28, 21, 2, 25, 37, 0, 6, 25, 24, 8,
-        112, 111, 115, 105, 116, 105, 111, 110, 21, 4, 22, 2, 22, 84, 22, 124, 38, 202, 1, 60, 54,
-        0, 40, 4, 0, 33, 14, 0, 24, 4, 0, 33, 14, 0, 0, 0, 22, 242, 17, 21, 22, 22, 212, 14, 21,
-        46, 0, 38, 190, 4, 28, 21, 12, 25, 37, 0, 6, 25, 56, 10, 105, 100, 101, 110, 116, 105, 102,
-        105, 101, 114, 4, 108, 105, 115, 116, 2, 105, 100, 21, 4, 22, 2, 22, 118, 22, 158, 1, 38,
-        160, 3, 60, 54, 0, 40, 7, 49, 48, 49, 57, 51, 57, 55, 24, 7, 49, 48, 49, 57, 51, 57, 55, 0,
-        0, 22, 136, 18, 21, 24, 22, 130, 15, 21, 58, 0, 38, 172, 6, 28, 21, 12, 25, 37, 0, 6, 25,
-        24, 9, 114, 101, 102, 101, 114, 101, 110, 99, 101, 21, 4, 22, 2, 22, 74, 22, 114, 38, 186,
-        5, 60, 54, 0, 40, 1, 71, 24, 1, 71, 0, 0, 22, 160, 18, 21, 22, 22, 188, 15, 21, 34, 0, 38,
-        238, 7, 28, 21, 12, 25, 37, 0, 6, 25, 24, 9, 97, 108, 116, 101, 114, 110, 97, 116, 101, 21,
-        4, 22, 2, 22, 74, 22, 114, 38, 252, 6, 60, 54, 0, 40, 1, 65, 24, 1, 65, 0, 0, 22, 182, 18,
-        21, 22, 22, 222, 15, 21, 34, 0, 38, 158, 9, 28, 21, 8, 25, 37, 0, 6, 25, 24, 7, 113, 117,
-        97, 108, 105, 116, 121, 21, 4, 22, 2, 22, 56, 22, 96, 38, 190, 8, 60, 54, 2, 0, 0, 22, 204,
-        18, 21, 22, 22, 128, 16, 21, 34, 0, 38, 194, 10, 28, 21, 12, 25, 37, 0, 6, 25, 56, 6, 102,
-        105, 108, 116, 101, 114, 4, 108, 105, 115, 116, 6, 102, 105, 108, 116, 101, 114, 21, 4, 22,
-        2, 22, 60, 22, 100, 38, 222, 9, 60, 54, 0, 0, 0, 22, 226, 18, 21, 22, 22, 162, 16, 21, 34,
-        0, 22, 156, 4, 22, 2, 38, 8, 22, 180, 6, 20, 0, 0, 25, 124, 38, 0, 28, 21, 12, 25, 5, 25,
-        24, 10, 99, 104, 114, 111, 109, 111, 115, 111, 109, 101, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0,
-        0, 22, 248, 18, 21, 6, 22, 196, 16, 21, 22, 0, 38, 0, 28, 21, 2, 25, 5, 25, 24, 8, 112,
-        111, 115, 105, 116, 105, 111, 110, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 254, 18, 21,
-        6, 22, 218, 16, 21, 22, 0, 38, 0, 28, 21, 12, 25, 5, 25, 56, 10, 105, 100, 101, 110, 116,
-        105, 102, 105, 101, 114, 4, 108, 105, 115, 116, 2, 105, 100, 21, 0, 22, 0, 22, 0, 22, 0,
-        38, 0, 0, 22, 132, 19, 21, 6, 22, 240, 16, 21, 22, 0, 38, 0, 28, 21, 12, 25, 5, 25, 24, 9,
-        114, 101, 102, 101, 114, 101, 110, 99, 101, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 138,
-        19, 21, 6, 22, 134, 17, 21, 22, 0, 38, 0, 28, 21, 12, 25, 5, 25, 24, 9, 97, 108, 116, 101,
-        114, 110, 97, 116, 101, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 144, 19, 21, 6, 22, 156,
-        17, 21, 22, 0, 38, 0, 28, 21, 8, 25, 5, 25, 24, 7, 113, 117, 97, 108, 105, 116, 121, 21, 0,
-        22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 150, 19, 21, 6, 22, 178, 17, 21, 22, 0, 38, 0, 28, 21,
-        12, 25, 5, 25, 56, 6, 102, 105, 108, 116, 101, 114, 4, 108, 105, 115, 116, 6, 102, 105,
-        108, 116, 101, 114, 21, 0, 22, 0, 22, 0, 22, 0, 38, 0, 0, 22, 156, 19, 21, 6, 22, 200, 17,
-        21, 22, 0, 22, 0, 22, 0, 38, 0, 22, 0, 20, 2, 0, 25, 28, 24, 12, 65, 82, 82, 79, 87, 58,
-        115, 99, 104, 101, 109, 97, 24, 244, 6, 47, 47, 47, 47, 47, 52, 56, 67, 65, 65, 65, 69, 65,
-        65, 65, 65, 56, 118, 47, 47, 47, 120, 81, 65, 65, 65, 65, 69, 65, 65, 69, 65, 65, 65, 65,
-        75, 65, 65, 115, 65, 67, 65, 65, 75, 65, 65, 81, 65, 43, 80, 47, 47, 47, 119, 119, 65, 65,
-        65, 65, 73, 65, 65, 103, 65, 65, 65, 65, 69, 65, 65, 99, 65, 65, 65, 65, 103, 65, 103, 65,
-        65, 48, 65, 69, 65, 65, 70, 65, 66, 65, 65, 65, 77, 65, 81, 65, 65, 121, 65, 65, 65, 65,
-        73, 81, 65, 65, 65, 65, 69, 65, 65, 65, 65, 55, 80, 47, 47, 47, 50, 119, 65, 65, 65, 66,
-        103, 65, 65, 65, 65, 71, 65, 65, 65, 65, 65, 119, 65, 65, 65, 65, 81, 65, 66, 69, 65, 66,
-        65, 65, 65, 65, 66, 65, 65, 67, 65, 65, 65, 65, 65, 119, 65, 65, 81, 65, 65, 65, 65, 81,
-        65, 65, 65, 68, 115, 47, 47, 47, 47, 76, 65, 65, 65, 65, 67, 65, 65, 65, 65, 65, 89, 65,
-        65, 65, 65, 66, 81, 65, 65, 65, 66, 65, 65, 69, 81, 65, 69, 65, 65, 65, 65, 69, 65, 65, 73,
-        65, 65, 65, 65, 68, 65, 65, 65, 65, 65, 65, 65, 47, 80, 47, 47, 47, 119, 81, 65, 66, 65,
-        65, 71, 65, 65, 65, 65, 90, 109, 108, 115, 100, 71, 86, 121, 65, 65, 68, 56, 47, 47, 47,
-        47, 66, 65, 65, 69, 65, 65, 89, 65, 65, 65, 66, 109, 97, 87, 120, 48, 90, 88, 73, 65, 65,
-        79, 122, 47, 47, 47, 56, 119, 65, 65, 65, 65, 73, 65, 65, 65, 65, 66, 103, 65, 65, 65, 65,
-        66, 65, 119, 65, 65, 69, 65, 65, 83, 65, 65, 81, 65, 69, 65, 65, 82, 65, 65, 103, 65, 65,
-        65, 65, 77, 65, 65, 65, 65, 65, 65, 68, 54, 47, 47, 47, 47, 65, 81, 65, 71, 65, 65, 89, 65,
-        66, 65, 65, 72, 65, 65, 65, 65, 99, 88, 86, 104, 98, 71, 108, 48, 101, 81, 68, 115, 47, 47,
-        47, 47, 76, 65, 65, 65, 65, 67, 65, 65, 65, 65, 65, 89, 65, 65, 65, 65, 66, 81, 65, 65, 65,
-        66, 65, 65, 69, 81, 65, 69, 65, 65, 65, 65, 69, 65, 65, 73, 65, 65, 65, 65, 68, 65, 65, 65,
-        65, 65, 65, 65, 47, 80, 47, 47, 47, 119, 81, 65, 66, 65, 65, 74, 65, 65, 65, 65, 89, 87,
-        120, 48, 90, 88, 74, 117, 89, 88, 82, 108, 65, 65, 65, 65, 55, 80, 47, 47, 47, 121, 119,
-        65, 65, 65, 65, 103, 65, 65, 65, 65, 71, 65, 65, 65, 65, 65, 85, 65, 65, 65, 65, 81, 65,
-        66, 69, 65, 66, 65, 65, 65, 65, 66, 65, 65, 67, 65, 65, 65, 65, 65, 119, 65, 65, 65, 65,
-        65, 65, 80, 122, 47, 47, 47, 56, 69, 65, 65, 81, 65, 67, 81, 65, 65, 65, 72, 74, 108, 90,
-        109, 86, 121, 90, 87, 53, 106, 90, 81, 65, 65, 65, 79, 122, 47, 47, 47, 57, 111, 65, 65,
-        65, 65, 88, 65, 65, 65, 65, 66, 103, 65, 65, 65, 65, 77, 65, 65, 65, 65, 69, 65, 65, 82,
-        65, 65, 81, 65, 65, 65, 65, 81, 65, 65, 103, 65, 65, 65, 65, 77, 65, 65, 69, 65, 65, 65,
-        65, 69, 65, 65, 65, 65, 55, 80, 47, 47, 47, 121, 119, 65, 65, 65, 65, 103, 65, 65, 65, 65,
-        71, 65, 65, 65, 65, 65, 85, 65, 65, 65, 65, 81, 65, 66, 69, 65, 66, 65, 65, 65, 65, 66, 65,
-        65, 67, 65, 65, 65, 65, 65, 119, 65, 65, 65, 65, 65, 65, 80, 122, 47, 47, 47, 56, 69, 65,
-        65, 81, 65, 65, 103, 65, 65, 65, 71, 108, 107, 65, 65, 68, 56, 47, 47, 47, 47, 66, 65, 65,
-        69, 65, 65, 111, 65, 65, 65, 66, 112, 90, 71, 86, 117, 100, 71, 108, 109, 97, 87, 86, 121,
-        65, 65, 68, 115, 47, 47, 47, 47, 79, 65, 65, 65, 65, 67, 65, 65, 65, 65, 65, 89, 65, 65,
-        65, 65, 65, 103, 65, 65, 65, 66, 65, 65, 69, 81, 65, 69, 65, 65, 65, 65, 69, 65, 65, 73,
-        65, 65, 65, 65, 68, 65, 65, 65, 65, 65, 65, 65, 57, 80, 47, 47, 47, 121, 65, 65, 65, 65,
-        65, 66, 65, 65, 65, 65, 67, 65, 65, 74, 65, 65, 81, 65, 67, 65, 65, 73, 65, 65, 65, 65, 99,
-        71, 57, 122, 97, 88, 82, 112, 98, 50, 52, 65, 65, 65, 65, 65, 55, 80, 47, 47, 47, 121, 119,
-        65, 65, 65, 65, 103, 65, 65, 65, 65, 71, 65, 65, 65, 65, 65, 85, 65, 65, 65, 65, 81, 65,
-        66, 69, 65, 66, 65, 65, 65, 65, 66, 65, 65, 67, 65, 65, 65, 65, 65, 119, 65, 65, 65, 65,
-        65, 65, 80, 122, 47, 47, 47, 56, 69, 65, 65, 81, 65, 67, 103, 65, 65, 65, 71, 78, 111, 99,
-        109, 57, 116, 98, 51, 78, 118, 98, 87, 85, 65, 0, 24, 44, 65, 114, 114, 111, 119, 50, 32,
-        45, 32, 78, 97, 116, 105, 118, 101, 32, 82, 117, 115, 116, 32, 105, 109, 112, 108, 101,
-        109, 101, 110, 116, 97, 116, 105, 111, 110, 32, 111, 102, 32, 65, 114, 114, 111, 119, 0,
-        107, 7, 0, 0, 80, 65, 82, 49,
-    ];
-
-    #[test]
-    fn convert_positives() {
-        let mut input = std::io::BufReader::new(&*VCF_FILE);
-        let mut output = Vec::new();
-
-        vcf2parquet(
-            &mut input,
-            &mut output,
-            1,
-            arrow2::io::parquet::write::CompressionOptions::Gzip(None),
-            false,
-        )
-        .unwrap();
-        assert_eq!(output, *PARQUET_FILE);
-    }
-
-    #[test]
-    fn not_a_vcf() {
-        let raw_data = [b'#', b'a', b'b', b'c', 255, 0x7F, b'\n'].to_vec();
-        let mut input = std::io::BufReader::new(&raw_data[..]);
-        let mut output = Vec::new();
-
-        let result = vcf2parquet(
-            &mut input,
-            &mut output,
-            1,
-            arrow2::io::parquet::write::CompressionOptions::Gzip(None),
-            false,
-        );
-
-        assert!(result.is_err());
-    }
-
-    #[test]
-    fn multi_positives() {
-        let mut input = std::io::BufReader::new(&*VCF_FILE);
-        let dir = tempfile::tempdir().unwrap();
-
-        let format = dir
-            .path()
-            .join("test_{}.parquet")
-            .as_os_str()
-            .to_str()
-            .unwrap()
-            .to_string();
-
-        vcf2multiparquet(
-            &mut input,
-            &format,
-            1,
-            arrow2::io::parquet::write::CompressionOptions::Gzip(None),
-            false,
-        )
-        .unwrap();
-    }
-}