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• FFMPEG Incompatible sprop-parameter-sets with libstagefright on Android 4.0 for H264

  7 août 2012, par user1582384

  I am having an issue with the RTSP SDP generated by FFMPEG in Android.
  I have the FFMPEG 0.11.1 compiled with NDK and running on Android. I use the FFSERVER to stream an mp4 file locally to the MediaPlayer.

  Here is the generated SDP description :

  08-07 14:04:04.034 : V/rtsp_server(20161) : o=- 0 0 IN IP4 127.0.0.1

  08-07 14:04:04.034 : V/rtsp_server(20161) : s=No Title

  08-07 14:04:04.034 : V/rtsp_server(20161) : c=IN IP4 0.0.0.0

  08-07 14:04:04.034 : V/rtsp_server(20161) : t=0 0

  08-07 14:04:04.034 : V/rtsp_server(20161) : a=tool:libavformat 54.6.100

  08-07 14:04:04.034 : V/rtsp_server(20161) : m=video 0 RTP/AVP 96

  08-07 14:04:04.034 : V/rtsp_server(20161) : b=AS:312

  08-07 14:04:04.034 : V/rtsp_server(20161) : a=x-dimensions:512,384

  08-07 14:04:04.034 : V/rtsp_server(20161) : a=rtpmap:96 H264/90000

  08-07 14:04:04.034 : V/rtsp_server(20161) : a=fmtp:96
  packetization-mode=0 ;profile-level-id=640015 ;sprop-parameter-sets=J2QAH62ECSZuIzSQgSTNxGaSECSZuIzSQgSTNxGaSECSZuIzSQgSTNxGaSEFWuvX1+T+vyfXrrVQgq116+vyf1+T69daq0BAGMg=,KO48sA==

  08-07 14:04:04.034 : V/rtsp_server(20161) : a=control:streamid=0

  08-07 14:04:04.034 : V/rtsp_server(20161) : m=audio 0 RTP/AVP 97

  08-07 14:04:04.034 : V/rtsp_server(20161) : b=AS:29

  08-07 14:04:04.034 : V/rtsp_server(20161) : a=rtpmap:97
  MPEG4-GENERIC/44100/1

  08-07 14:04:04.034 : V/rtsp_server(20161) : a=fmtp:97
  profile-level-id=1 ;mode=AAC-hbr ;sizelength=13 ;indexlength=3 ;indexdeltalength=3 ;
  config=1208

  08-07 14:04:04.034 : V/rtsp_server(20161) : a=control:streamid=1

  Running the same application on Galaxy S2 works since it uses libopencore. But on newer devices it crashes while trying to extract the width and height from the extradata.

  So the problem is with the sprop-parameter-sets.

  My question is why does libstagefright parse the sprop-parameter-sets differently and how could the existing string be converted for compatibility ?

• UDP to MP4 transcoding via ffmpeg

  30 juillet 2013, par Andrew J. Freyer

  I have not been able go find any substantial documentation to answer this question, so please forgive me if this is a simple question.

  Quite simply, I am trying to transcode a UDP video stream to a live MP4 stream with ffmpeg.

  I have been unable to successfully implement either step here. Any help or advice is appreciated.

• ffmpeg : using the returned data in php

  4 décembre 2013, par user1503606

  I have started using ffmpeg and I am very new to it, so please bear with me.

  I have installed ffmpeg on my server and it works great ; I can run certain commands and get output data when logged in via ssh

  For example I can run

  ffmpeg -i Sleep\ Away.mp3 

  Which returns the following :

  ffmpeg version 0.8.5, Copyright (c) 2000-2011 the FFmpeg developers
  
    built on Aug 20 2012 09:28:43 with clang 3.1 (tags/Apple/clang-318.0.61)
  
    configuration: --enable-nonfree --enable-gpl --enable-version3 --enable-postproc --enable-swscale --enable-avfilter --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libfaac --enable-libxvid --enable-libx264 --enable-libvpx --enable-hardcoded-tables --enable-shared --enable-pthreads --disable-indevs --cc=clang
  
    libavutil    51.  9. 1 / 51.  9. 1
  
    libavcodec   53.  7. 0 / 53.  7. 0
  
    libavformat  53.  4. 0 / 53.  4. 0
  
    libavdevice  53.  1. 1 / 53.  1. 1
  
    libavfilter   2. 23. 0 /  2. 23. 0
  
    libswscale    2.  0. 0 /  2.  0. 0
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  [mp3 @ 0x7f9694011a00] Header missing
  
      Last message repeated 13 times
  
  [mp3 @ 0x7f9694007c00] max_analyze_duration 5000000 reached at 5007020
  
  [mp3 @ 0x7f9694007c00] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from 'Sleep Away.mp3':
  
    Metadata:
  
      track           : 3
  
      album           : Bob Acri
  
      artist          : Bob Acri
  
      title           : Sleep Away
  
      genre           : Jazz
  
      album_artist    : Bob Acri
  
      composer        : Robert R. Acri
  
      date            : 2004
  
    Duration: 00:03:21.77, start: 0.000000, bitrate: 192 kb/s
  
      Stream #0.0: Audio: mp3, 44100 Hz, stereo, s16, 192 kb/s
  
  At least one output file must be specified

  The question I am asking is, how can I use the output data above ? I am developiong a music website ; say I want to loop through all the MP3 files and save the info about them into a database, so that the above would result in :

  Sleep Away.mp3    mp3    3:21    Jazz    2004     Bob Acri ...

  obviously in a table

  I have tried to use the php backtick operator with no success so far. I just thought I would put a question up here to get some advice from people that have done something similar.

  Thanks

  Update : I have tried the following

  &lt;?php $output = `ffmpeg -i Sleep\ Away.mp3`; echo "<pre>$output</pre>"; ?>
  
  &lt;?php $output = shell_exec(&#39;ffmpeg -i Sleep\ Away.mp3&#39;); echo "<pre>$output</pre>"; ?>

  both don't appear to return anything.