fixed new clippy's

src/ffi.rs

@@ -145,6 +145,7 @@ pub fn output_raw_packetized_buf_start(
             // signature. Since it changed since ffmpeg 7 and we don't know during compile time
             // what verion we're dealing with, this trick will convert to the either the signature
             // where the buffer argument is `*const u8` or `*mut u8`.
+            #[allow(clippy::missing_transmute_annotations)]
             Some(std::mem::transmute::<*const (), _>(
                 output_raw_buf_start_callback as _,
             )),

src/ffi_hwaccel.rs

@@ -117,7 +117,7 @@ unsafe extern "C" fn hwaccel_get_format(
 ) -> ffmpeg::ffi::AVPixelFormat {
     let mut p = pix_fmts;
     while *p != ffmpeg::ffi::AVPixelFormat::AV_PIX_FMT_NONE {
-        if *p == std::mem::transmute((*ctx).opaque as i32) {
+        if *p == std::mem::transmute::<i32, ffmpeg::ffi::AVPixelFormat>((*ctx).opaque as i32) {
             return *p;
         }
         p = p.add(1);

src/io.rs

@@ -160,9 +160,7 @@ impl Reader {
     /// Seek to start of reader. This function performs best effort seeking to the start of the
     /// file.
     pub fn seek_to_start(&mut self) -> Result<()> {
-        self.input
-            .seek(i64::min_value(), ..)
-            .map_err(Error::BackendError)
+        self.input.seek(i64::MIN, ..).map_err(Error::BackendError)
     }
 
     /// Find the best video stream and return the index.