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• ffmpeg-mp4box-mpeg dash plays only few segments

  30 octobre 2015, par Idris

  Need help in debugging the segment dash files

  The input was an MP4 with these details. This was recorded from a video camera, the output from the camera was mkv and we converted into MP4 after editing the audio via adobe

  • Size : 7.51 GB Frame rate : 25 frames/ second
  • Data rate : 25326kbps
  • Total bitrate : 25525kbps

  Converted this to another mp4 with this command

  ffmpeg -i "input.mp4" -s 1280x720 -c:v libx264 -b:v 750k -bf 2 -g 75 -sc_threshold 0 -an video_1280x720_750k.mp4
  
  
  
  ffmpeg -i "input.mp4"  -c:a aac -strict experimental -b:a 96k -ar 32000 -vn audio_96k.mp4

  The output video has

  • fps : 25
  • Data rate : 761kbps
  • bitrate : 761kbps

  Then, created the segmented dash through MP4Box

  MP4Box -dash 10000 -frag 10000 -rap -segment-name video_0_1280000\segment_ video_1280x720_750k.mp4
  
  
  
  MP4Box -dash 3000 -frag 10000 -rap -segment-name audio_0_96000\segment_ audio_96k.mp4

  The MPD generated was validated online and its perfect

  UPDATE ! Included the MPD file

  <?xml version="1.0"?>
  
  
  
  <mpd xmlns="urn:mpeg:dash:schema:mpd:2011" minbuffertime="PT1.500S" type="static" mediapresentationduration="PT0H2M0.000S" maxsegmentduration="PT0H0M10.000S" profiles="urn:mpeg:dash:profile:full:2011">
  
   <programinformation moreinformationurl="http://gpac.sourceforge.net">
  
    
  
   </programinformation>
  
  
  
   <period duration="PT0H2M0.000S">
  
     <adaptationset segmentalignment="true" lang="eng">
  
       <representation mimetype="audio/mp4" codecs="mp4a.40.2" audiosamplingrate="32000" startwithsap="1" bandwidth="98434">
  
         <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
  
         <segmentlist timescale="32000" duration="319999">
  
           <initialization sourceurl="audio_0_96000/segment_init.mp4"></initialization>
  
           <segmenturl media="audio_0_96000/segment_1.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_2.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_3.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_4.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_5.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_6.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_7.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_8.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_9.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_10.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_11.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_12.m4s"></segmenturl>
  
           <segmenturl media="audio_0_96000/segment_13.m4s"></segmenturl>
  
         </segmentlist>
  
       </representation>
  
     </adaptationset>
  
    <adaptationset segmentalignment="true" maxwidth="1280" maxheight="720" maxframerate="25" par="16:9" lang="eng">
  
     <representation mimetype="video/mp4" codecs="avc3.64001f" width="1280" height="720" framerate="25" sar="1:1" startwithsap="1" bandwidth="764668">
  
      <segmentlist timescale="12800" duration="125866">
  
       <initialization sourceurl="video_0_1280000/segment_init.mp4"></initialization>
  
       <segmenturl media="video_0_1280000/segment_1.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_2.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_3.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_4.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_5.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_6.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_7.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_8.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_9.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_10.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_11.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_12.m4s"></segmenturl>
  
       <segmenturl media="video_0_1280000/segment_13.m4s"></segmenturl>
  
      </segmentlist>
  
     </representation>
  
    </adaptationset>
  
  
  
   </period>
  
  </mpd>

  Played the video through dashjs.. I believe it just plays the initial segment and errors out as MEDIA_ERR_DECODE..MEDIA_ERR_SRC_NOT_SUPPORTED.. or some message which says start not found..

  Through chrome debugging I see that atleast 4 segments are correctly loading.. I am not sure whats going on..

  Any help in debugging the issue is really appreciated. I really can’t understand if this is a problem with the file or ffmpeg or mp4box or chrome.

  Output from chrome debugging tool

  [dash.js 1.5.1] new MediaPlayer instance has been created 
  
  dash.all.js:11 Playback initiated! 
  
  dash.all.js:11 Parsing complete: ( xml2json: 5ms, objectiron: 10ms, total: 0.015s) 
  
  dash.all.js:11 Manifest has been refreshed at Mon Oct 26 2015 10:19:22 GMT-0400 (Eastern Daylight Time)[1445869162092]  
  
  dash.all.js:11 SegmentTimeline detected using calculated Live Edge Time 
  
  dash.all.js:11 MediaSource is open! 
  
  dash.all.js:11 [object Event] 
  
  dash.all.js:11 Duration successfully set to: 120 
  
  dash.all.js:11 Added 0 inline events 
  
  dash.all.js:11 video codec: video/mp4;codecs="avc3.64001f" 
  
  dash.all.js:11 [video] stop 
  
  dash.all.js:11 audio codec: audio/mp4;codecs="mp4a.40.2" 
  
  dash.all.js:11 [audio] stop 
  
  dash.all.js:11 No text data. 
  
  dash.all.js:11 No fragmentedText data. 
  
  dash.all.js:11 No muxed data. 
  
  dash.all.js:11 [video] start 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 [video] SegmentList: 0 / 120 
  
  dash.all.js:11 [audio] start 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 [audio] SegmentList: 0 / 120 
  
  dash.all.js:11 [video] Getting the request for time: 9.83328125 
  
  dash.all.js:11 [video] Index for time 9.83328125 is 0 
  
  dash.all.js:11 [video] SegmentList: 0 / 120 
  
  dash.all.js:11 [video] SegmentList: 9.83328125 / 120 
  
  dash.all.js:11 [audio] Getting the request for time: 9.99996875 
  
  dash.all.js:11 [audio] Index for time 9.99996875 is 0 
  
  dash.all.js:11 [audio] SegmentList: 0 / 120 
  
  dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 
  
  dash.all.js:11 loaded audio:Media Segment:0 (200, 20ms, 6ms) 
  
  dash.all.js:11 loaded video:Media Segment:0 (200, 153ms, 43ms) 
  
  dash.all.js:11 loaded video:Initialization Segment:NaN (200, 0ms, 32ms) 
  
  dash.all.js:11 [video] Initialization finished loading 
  
  dash.all.js:11 loaded audio:Initialization Segment:NaN (200, 0ms, 34ms) 
  
  dash.all.js:11 [audio] Initialization finished loading 
  
  dash.all.js:11 [video] Getting the request for time: 19.6665625 
  
  dash.all.js:11 [video] Index for time 19.6665625 is 1 
  
  dash.all.js:11 [video] SegmentList: 9.83328125 / 120 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [audio] Getting the request for time: 19.9999375 
  
  dash.all.js:11 [audio] Index for time 19.9999375 is 1 
  
  dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 
  
  dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 
  
  dash.all.js:11 [video] Stalling Buffer 
  
  dash.all.js:11 [video] Waiting for more buffer before starting playback. 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 [audio] Stalling Buffer 
  
  dash.all.js:11 [audio] Waiting for more buffer before starting playback. 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 <video> loadedmetadata 
  
  dash.all.js:11 Starting playback at offset: 0 
  
  dash.all.js:11 [video] Getting the request for time: 29.499843750000004 
  
  dash.all.js:11 [video] Index for time 29.499843750000004 is 2 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 
  
  dash.all.js:11 [video] Got enough buffer to start. 
  
  dash.all.js:11 [video] seek: 0 
  
  dash.all.js:11 [audio] Getting the request for time: 29.999906250000002 
  
  dash.all.js:11 [audio] Index for time 29.999906250000002 is 2 
  
  dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 
  
  dash.all.js:11 [audio] SegmentList: 29.999906250000002 / 120 
  
  dash.all.js:11 [audio] Got enough buffer to start. 
  
  dash.all.js:11 [audio] seek: 0 
  
  dash.all.js:11 loaded audio:Media Segment:9.99996875 (200, 67ms, 24ms) 
  
  dash.all.js:11 loaded video:Media Segment:9.83328125 (200, 71ms, 31ms) 
  
  dash.all.js:11 [audio] Buffered Range: 0.032 - 9.984 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 Start Event Controller 
  
  dash.all.js:11 [audio] Buffered Range: 0.032 - 19.999968 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 <video> play 
  
  dash.all.js:11 [video] start 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 [video] SegmentList: 0 / 120 
  
  dash.all.js:11 [video] SegmentList: 9.83328125 / 120 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [audio] start 
  
  dash.all.js:11 <video> playing 
  
  dash.all.js:11 [video] Buffered Range: 0 - 9 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 Do seek: 0.032 
  
  dash.all.js:11 <video> seek 
  
  dash.all.js:11 [video] Getting the request for time: 29.499843750000004 
  
  dash.all.js:11 [video] Index for time 29.499843750000004 is 2 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 
  
  dash.all.js:11 [video] seek: 0.032 
  
  dash.all.js:11 [audio] seek: 0.032 
  
  dash.all.js:11 [video] Getting the request for time: 9 
  
  dash.all.js:11 [video] Index for time 9 is 0 
  
  dash.all.js:11 [video] SegmentList: 0 / 120 
  
  dash.all.js:11 [video] SegmentList: 9.83328125 / 120 
  
  dash.all.js:11 [video] SegmentList: 19.6665625 / 120 
  
  dash.all.js:11 [video] SegmentList: 29.499843750000004 / 120 
  
  dash.all.js:11 [video] Buffered Range: 0 - 18 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 loaded video:Media Segment:19.6665625 (200, 42ms, 33ms) 
  
  dash.all.js:11 <video> seeked 
  
  dash.all.js:11 Start Event Controller 
  
  dash.all.js:11 <video> playing 
  
  dash.all.js:11 [video] Buffered Range: 0 - 28 
  
  dash.all.js:11 [video] Getting the request for time: 0 
  
  dash.all.js:11 [video] Index for time 0 is 0 
  
  dash.all.js:11 [audio] Getting the request for time: 19.999968 
  
  dash.all.js:11 [audio] Index for time 19.999968 is 1 
  
  dash.all.js:11 [audio] SegmentList: 9.99996875 / 120 
  
  dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 
  
  dash.all.js:11 [audio] Getting the request for time: 29.999906250000002 
  
  dash.all.js:11 [audio] Index for time 29.999906250000002 is 2 
  
  dash.all.js:11 [audio] SegmentList: 19.9999375 / 120 
  
  dash.all.js:11 [audio] SegmentList: 29.999906250000002 / 120 
  
  dash.all.js:11 loaded audio:Media Segment:19.9999375 (200, 102ms, 2ms) 
  
  dash.all.js:11 [audio] Buffered Range: 0.032 - 29.983968 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 loaded audio:Media Segment:29.999906250000002 (200, 26ms, 2ms) 
  
  dash.all.js:11 [audio] Buffered Range: 0.032 - 39.999968 
  
  dash.all.js:11 [audio] Getting the request for time: 0 
  
  dash.all.js:11 [audio] Index for time 0 is 0 
  
  dash.all.js:11 loaded video:Media Segment:29.499843750000004 (200, 47ms, 7ms) 
  
  dash.all.js:11 Video Element Error: MEDIA_ERR_DECODE 
  
  dash.all.js:11 [video] stop 
  
  dash.all.js:11 [audio] stop 
  
  dash.all.js:11 Video Element Error: MEDIA_ERR_SRC_NOT_SUPPORTED 
  
  dash.all.js:11 <video> play 
  
  </video></video></video></video></video></video></video>

• how to host live stream video

  21 août 2015, par Vhanjan

  Using jwplayer with html5 users can watch videos online..
  just put the source where the video file is located,, and the users can play the video that easy..

  i also tried to put a live stream source, as i remember it is rts ://sampledomain.com/video.mp4,
  then jwplayer easily play that mp4 file..

  my question is
  how can i host this kind of file "rts ://sampledomain.com/video.mp4" using my web camera or hypercam3 as my video recorder.. and send it to jwplayer so the users can play live stream in the browser using jwplayer..

  any hint are appreciated, but thank you very much for step by step tutorials..

• need help configuring ffmpeg to decode raw AAC with android ndk

  24 octobre 2016, par Matt Wolfe

  I’ve got an android app that gets raw AAC bytes from an external device and I want to decode that data but I can’t seem to get the decoder to work, yet ffmpeg seems to work fine for decoding an mp4 file that contains the same audio data (verified with isoviewer). Recently I was able to get this ffmpeg library on android to decode video frames from the same external device but audio won’t seem to work.

  Here is the ffmpeg output for the file with the same data :

  $ ffmpeg -i Video_2000-01-01_0411.mp4
  
  ffmpeg version 2.6.1 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.6.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-vda
  
    libavutil      54. 20.100 / 54. 20.100
  
    libavcodec     56. 26.100 / 56. 26.100
  
    libavformat    56. 25.101 / 56. 25.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 11.102 /  5. 11.102
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'AXON_Flex_Video_2000-01-01_0411.mp4':
  
    Metadata:
  
      major_brand     : mp42
  
      minor_version   : 1
  
      compatible_brands: isom3gp43gp5
  
    Duration: 00:00:15.73, start: 0.000000, bitrate: 1134 kb/s
  
      Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, mono, fltp, 40 kb/s (default)
  
      Metadata:
  
        handler_name    : soun
  
      Stream #0:1(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 1087 kb/s, 29.32 fps, 26.58 tbr, 90k tbn, 1k tbc (default)
  
      Metadata:
  
        handler_name    : vide

  Here is my ndk code for setting up and decoding the audio :

  jint ffmpeg_init(JNIEnv * env, jobject this) {
  
      audioCodec = avcodec_find_decoder(AV_CODEC_ID_AAC);
  
      if (!audioCodec) {
  
          LOGE("audio codec %d not found", AV_CODEC_ID_AAC);
  
          return -1;
  
      }
  
  
  
      audioContext = avcodec_alloc_context3(audioCodec);
  
      if (!audioContext) {
  
          LOGE("Could not allocate codec context");
  
          return -1;
  
      }
  
  
  
       int openRet = avcodec_open2(audioContext, audioCodec, NULL);
  
          if (openRet < 0) {
  
            LOGE("Could not open codec, error:%d", openRet);
  
            return -1;
  
          }
  
  
  
      audioContext->sample_rate = 8000;
  
      audioContext->channel_layout = AV_CH_LAYOUT_MONO;
  
      audioContext->profile = FF_PROFILE_AAC_LOW;
  
      audioContext->bit_rate = 48 * 1024;
  
      audioContext->sample_fmt = AV_SAMPLE_FMT_FLTP;
  
  
  
    //  unsigned char extradata[] = {0x15, 0x88}; 
  
    //  audioContext->extradata = extradata;
  
    //  audioContext->extradata_size = sizeof(extradata);
  
      audioFrame = av_frame_alloc();
  
      if (!audioFrame) {
  
          LOGE("Could not create audio frame");
  
          return -1;
  
      }
  
  }
  
  
  
  
  
  jint ffmpeg_decodeAudio(JNIEnv *env, jobject this, jbyteArray aacData, jbyteArray output, int offset, int len) {
  
  
  
      LOGI("ffmpeg_decodeAudio()");
  
      char errbuf[128];
  
      AVPacket avpkt = {0};
  
      av_init_packet(&avpkt);
  
      LOGI("av_init_packet()");
  
      int error, got_frame;    
  
      uint8_t* buffer = (uint8_t *) (*env)->GetByteArrayElements(env, aacData,0);
  
      uint8_t* copy = av_malloc(len);  
  
      memcpy(copy, &buffer[offset], len);
  
      av_packet_from_data(&avpkt, copy, len);
  
  
  
  
  
      if ((error = avcodec_decode_audio4(audioContext, audioFrame, &got_frame, &avpkt)) < 0) {
  
          ffmpeg_log_error(error);
  
          av_free_packet(&avpkt);
  
          return error;
  
      }
  
      if (got_frame) {
  
          LOGE("Copying audioFrame->extended_data to output jbytearray, linesize[0]:%d", audioFrame->linesize[0]);
  
          (*env)->SetByteArrayRegion(env, output, 0, audioFrame->linesize[0],  *audioFrame->extended_data);
  
      }
  
  
  
      return 0;
  
  
  
  }

  As you can see I’ve got an init function that opens the decoder and creates the context, these things all work fine, without error. However when I call avcodec_decode_audio4 I get an error :

  FFMPEG error : -1094995529, Invalid data found when processing input

  I’ve tried all sorts of combinations of AVCodecContext properties. I’m not sure which I need to set for the decoder to do it’s job but from reading online I should just need to set the channel layout and the sample_rate (which I’ve tried by themself). I’ve also tried setting the extradata/extradata_size parameters to that which should match the video settings per : http://wiki.multimedia.cx/index.php?title=MPEG-4_Audio
  But no luck.

  Since the device we’re getting packets from sends aac data that have no sound at the beginning (but are valid packets), I’ve tried to just send those since they definitely should decode correctly.

  Here is an example of the initial audio packets that are of silence :

   010c9eb43f21f90fc87e46fff10a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5dffe214b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4b4bbd1c429696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696969696978

  Note that the data shown above is just a hex encoding of the data that I’m putting in AVPacket, and it was sent from an external device to the android application. My application doesn’t have direct access to the file though so I need to decode the raw frames/samples as I get them. When I look at the audio track data in isoviewer I can see that the audio track’s first sample is the same data as what I got from the device that contained that file (thus, the external device is just sending me the sample’s raw data). I believe this data can be derived from reading stsz (sample size) box starting at stco (chunk offset) boxes from the mdat box of the file.

  Also, isoviewer shows the esds box as having the following :

  ESDescriptor{esId=0, streamDependenceFlag=0, URLFlag=0, oCRstreamFlag=0, streamPriority=0, URLLength=0, URLString='null', remoteODFlag=0, dependsOnEsId=0, oCREsId=0, decoderConfigDescriptor=DecoderConfigDescriptor{objectTypeIndication=64, streamType=5, upStream=0, bufferSizeDB=513, maxBitRate=32000, avgBitRate=32000, decoderSpecificInfo=null, audioSpecificInfo=AudioSpecificConfig{configBytes=1588, audioObjectType=2 (AAC LC), samplingFrequencyIndex=11 (8000), samplingFrequency=0, channelConfiguration=1, syncExtensionType=0, frameLengthFlag=0, dependsOnCoreCoder=0, coreCoderDelay=0, extensionFlag=0, layerNr=0, numOfSubFrame=0, layer_length=0, aacSectionDataResilienceFlag=false, aacScalefactorDataResilienceFlag=false, aacSpectralDataResilienceFlag=false, extensionFlag3=0}, configDescriptorDeadBytes=, profileLevelIndicationDescriptors=[[]]}, slConfigDescriptor=SLConfigDescriptor{predefined=2}}

  And the binary is this :

  00 00 00 30 65 73 64 73 00 00 00 00 03 80 80 80
  
  1f 00 00 00 04 80 80 80 14 40 15 00 02 01 00 00
  
  7d 00 00 00 7d 00 05 80 80 80 02 15 88 06 01 02