chore: fix clippy warnings

src/mp4box/emsg.rs

@@ -26,7 +26,7 @@ impl EmsgBox {
             4 + // id
             Self::time_size(version) +
             (scheme_id_uri.len() + 1) as u64 +
-            (value.len() as u64 + 1) as u64
+            (value.len() as u64 + 1)
     }
 
     fn time_size(version: u8) -> u64 {

src/mp4box/meta.rs

@@ -19,7 +19,7 @@ impl<R: Read + Seek> ReadBox<&mut R> for MetaBox {
         if version != 0 {
             return Err(Error::UnsupportedBoxVersion(
                 BoxType::UdtaBox,
-                version as u8,
+                version,
             ));
         }
 

src/track.rs

@@ -427,7 +427,7 @@ impl Mp4Track {
     fn sample_offset(&self, sample_id: u32) -> Result<u64> {
         if !self.trafs.is_empty() {
             if let Some((traf_idx, _sample_idx)) = self.find_traf_idx_and_sample_idx(sample_id) {
-                Ok(self.trafs[traf_idx].tfhd.base_data_offset as u64)
+                Ok(self.trafs[traf_idx].tfhd.base_data_offset)
             } else {
                 Err(Error::BoxInTrafNotFound(self.track_id(), BoxType::TrafBox))
             }