.

examples/mp4copy.rs

@@ -63,7 +63,7 @@ fn copy<P: AsRef<Path>>(src_filename: &P, dst_filename: &P) -> Result<()> {
                 profile: track.audio_profile()?,
                 freq_index: track.sample_freq_index()?,
                 chan_conf: track.channel_config()?,
-                esds: None
+                esds: None,
             }),
             MediaType::OPUS => MediaConfig::OpusConfig(OpusConfig {
                 bitrate: track.bitrate(),

src/mp4box/mp4a.rs

@@ -28,7 +28,7 @@ impl Default for Mp4aBox {
 }
 
 impl Mp4aBox {
-    pub fn new(config: &AacConfig ) -> Self {
+    pub fn new(config: &AacConfig) -> Self {
         Self {
             data_reference_index: 1,
             channelcount: config.chan_conf as u16,
@@ -314,7 +314,7 @@ pub struct ESDescriptor {
 impl ESDescriptor {
     pub fn new(config: &AacConfig) -> Self {
         let mut dec_config = DecoderConfigDescriptor::new(config);
-        let mut sl_config =  SLConfigDescriptor::new();
+        let mut sl_config = SLConfigDescriptor::new();
         if config.esds.is_some() {
             dec_config = config.esds.clone().unwrap().es_desc.dec_config;
             sl_config = config.esds.clone().unwrap().es_desc.sl_config;

src/reader.rs

@@ -270,7 +270,11 @@ impl<R: Read + Seek> Mp4Reader<R> {
         }
     }
 
-    pub fn read_sample_metadata(&mut self, track_id: u32, sample_id: u32) -> Result<Option<Mp4SampleMetadata>> {
+    pub fn read_sample_metadata(
+        &mut self,
+        track_id: u32,
+        sample_id: u32,
+    ) -> Result<Option<Mp4SampleMetadata>> {
         if let Some(track) = self.tracks.get(&track_id) {
             track.read_sample_metadata(sample_id)
         } else {
@@ -278,7 +282,6 @@ impl<R: Read + Seek> Mp4Reader<R> {
         }
     }
 
-
     pub fn sample_offset(&mut self, track_id: u32, sample_id: u32) -> Result<u64> {
         if let Some(track) = self.tracks.get(&track_id) {
             track.sample_offset(sample_id)

src/track.rs

@@ -5,6 +5,7 @@ use std::io::{Read, Seek, SeekFrom, Write};
 use std::time::Duration;
 
 use crate::elst::ElstEntry;
+use crate::mp4a::EsdsBox;
 use crate::mp4box::traf::TrafBox;
 use crate::mp4box::trak::TrakBox;
 use crate::mp4box::trun::TrunBox;
@@ -303,6 +304,15 @@ impl Mp4Track {
         }
     }
 
+    pub fn get_esds(&self) -> Result<&EsdsBox> {
+        if let Some(ref mp4a) = self.trak.mdia.minf.stbl.stsd.mp4a {
+            if let Some(ref esds) = mp4a.esds {
+                return Ok(esds);
+            }
+        }
+        Err(Error::BoxInStblNotFound(self.track_id(), BoxType::EsdsBox))
+    }
+
     pub fn picture_parameter_set(&self) -> Result<&[u8]> {
         if let Some(ref avc1) = self.trak.mdia.minf.stbl.stsd.avc1 {
             match avc1.avcc.picture_parameter_sets.first() {
@@ -619,11 +629,8 @@ impl Mp4Track {
         }
     }
 
-    pub(crate) fn read_sample_metadata(
-        &self,
-        sample_id: u32,
-    ) -> Result<Option<Mp4SampleMetadata>> {
-        let (start_time, duration) = self.sample_time(sample_id).unwrap(); 
+    pub(crate) fn read_sample_metadata(&self, sample_id: u32) -> Result<Option<Mp4SampleMetadata>> {
+        let (start_time, duration) = self.sample_time(sample_id).unwrap();
         let rendering_offset = self.sample_rendering_offset(sample_id);
         let is_sync = self.is_sync_sample(sample_id);