refactor: refactor stream chunks to 5 seconds

closes #14

lib/exstream_web/controllers/playlist_controller.ex

@@ -2,17 +2,17 @@ defmodule ExstreamWeb.PlaylistController do
   use ExstreamWeb, :controller
 
     defp get_extinf(url, path, duration) do
-      steps = floor((Extaima.parse(duration) |> Extaima.seconds()) / 10)
+      steps = floor((Extaima.parse(duration) |> Extaima.seconds()) / 5)
 
       Enum.map_join(1..steps, fn step ->
-        "#EXTINF:10,\n#{url}?path=#{path}&start=#{step * 10 - 10}&end=#{step * 10}\n"
+        "#EXTINF:5,\n#{url}?path=#{path}&start=#{step * 5 - 5}&end=#{step * 5}\n"
       end)
     end
 
     def build(url, path, duration) do
       "#EXTM3U\n" <>
         "#EXT-X-PLAYLIST-TYPE:VOD\n" <>
-        "#EXT-X-TARGETDURATION:10\n" <>
+        "#EXT-X-TARGETDURATION:5\n" <>
         "#EXT-X-VERSION:4\n" <>
         "#EXT-X-MEDIA-SEQUENCE:0\n" <>
         get_extinf(url, path, duration) <>

test/fixtures/playlist.m3u8

@@ -1,12 +1,18 @@
 #EXTM3U
 #EXT-X-PLAYLIST-TYPE:VOD
-#EXT-X-TARGETDURATION:10
+#EXT-X-TARGETDURATION:5
 #EXT-X-VERSION:4
 #EXT-X-MEDIA-SEQUENCE:0
-#EXTINF:10,
-/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=0&end=10
-#EXTINF:10,
-/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=10&end=20
-#EXTINF:10,
-/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=20&end=30
+#EXTINF:5,
+/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=0&end=5
+#EXTINF:5,
+/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=5&end=10
+#EXTINF:5,
+/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=10&end=15
+#EXTINF:5,
+/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=15&end=20
+#EXTINF:5,
+/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=20&end=25
+#EXTINF:5,
+/some/url?path=dev/sample__1080__libx265__ac3__30s__video.mkv&start=25&end=30
 #EXT-X-ENDLIST