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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>

• FFmpeg DLL console command-line wrapper for C# use

  4 novembre 2015, par williamtroup

  I’ve been studying the FFmpeg project for a while, using mainly the command line to generate videos, extract audio, joined videos (etc). I like the flexibility of the command line and its a very useful and fast tool.

  I was wondering, however, would it be possible to convert the C source code for the project and wrap it in a DLL, making the command line callable from a DLL entry point method ?

  Does something like this already exist ?

• RTP Streaming with ffmpeg : server streaming, client failing

  27 novembre 2013, par Christoph Kuhr

  I compiled ffmpeg and x264 myself.

  x264 version :

   #define X264_REV 2377
  
   #define X264_REV_DIFF 0
  
   #define X264_VERSION " r2377 1ca7bb9"
  
   #define X264_POINTVER "0.140.2377 1ca7bb9"

  ffmpeg version : 0.11.4
  ffmpeg configuration :

   --enable-x11grab --enable-pthreads --enable-libfaac --enable-libxvid --enable-libx264 --enable-libv4l2 --enable-libmp3lame --enable-libpulse --enable-gpl --enable-nonfree --disable-yasm

  streaming server call :

  ffmpeg -f x11grab -s 1600x900 -framerate 50 -i :0.0 -vcodec libx264 -threads 4 -preset ultrafast -crf 0 -q:v 1 -b:v 8M -an -f rtp rtp://192.168.188.30:8710
  
  
  
  ...
  
  
  
   Output #0, rtp, to 'rtp://192.168.188.30:8710':
  
    Metadata:
  
      encoder         : Lavf54.6.100
  
      Stream #0:0: Video: h264, yuv420p, 1600x900, q=-1--1, 8000 kb/s, 90k tbn, 50 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo -> libx264)
  
  SDP:
  
  v=0
  
  o=- 0 0 IN IP4 127.0.0.1
  
  s=No Name
  
  c=IN IP4 192.168.188.30
  
  t=0 0
  
  a=tool:libavformat 54.6.100
  
  m=video 8710 RTP/AVP 96
  
  b=AS:8000
  
  a=rtpmap:96 H264/90000
  
  a=fmtp:96 packetization-mode=1

  Everything looks good so far...

  Now the problem.
  I create foo.sdp from the SDP output of the server and try to playback the stream with ffmpeg ffplay foo.sdp. ffplay fails with the following error :

   [sdp @ 0x7f5e0c0008c0] decoding for stream 0 failed
  
   [sdp @ 0x7f5e0c0008c0] Could not find codec parameters (Video: h264)
  
   [sdp @ 0x7f5e0c0008c0] Estimating duration from bitrate, this may be inaccurate
  
   gameserver.sdp: could not find codec parameters

  If I try the same with VLC, it also fails, but with the different error :

    [0x7f3278c045b8] live555 demux error: no data received in 10s, aborting

  Look like different reasons. But I could not solve either. Does anyone have a clue ?