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• Merge commit '1202b712690c14f0efb06e4ad8b06c5b3df6822a'

  11 mai 2017, par James Almer

  Merge commit '1202b712690c14f0efb06e4ad8b06c5b3df6822a'
  * commit '1202b712690c14f0efb06e4ad8b06c5b3df6822a' :
  
    theora : export cropping information instead of handling it internally
  
    h264dec : export cropping information instead of handling it internally
  
    h264dec : be more explicit in handling container cropping
  
    hevcdec : export cropping information instead of handling it internally
  This commit is a noop.
  This changes the cropping behavior, when it's supposedly only meant to move
  
  it outside of the decoder.
  
  See https://ffmpeg.org/pipermail/ffmpeg-devel/2017-May/211239.html for the
  
  discussion about it.
  Merged-by : James Almer <jamrial@gmail.com>
  

• ffmpeg : StreamNotFound error

  27 janvier 2017, par KMG

  I’m using Adobe Media server and push streams to this server using FMLE.

  My stream name : appvideo

  When I tried to pull the video from the server using ffmpeg/ffplay, I’m not getting "stream not found error". Whereas rtmpdump can stream the video.

  After I see the logs, all the ffmpeg request logs have a stream name with extension .flv like [appvideo.flv]. But rtmpdump not append this extension [ like appvideo].

  FFMpeg/ffplay log in Media server :

  play    stream  2017-01-27  02:26:17    GMT appvideo    10.11.12.202    32715   11  17  _defaultRoot_   _defaultVHost_  live    _definst_   0   404 183.82.250.50   rtmp    -   rtmp://10.11.12.202:443/live    rtmp://10.11.12.202:443/live    -   --  4702122229742256497 3135    3631    normal  appvideo    -   -   rtmp://10.11.12.202:443/live/appvideo.flv   rtmp://10.11.12.202:443/live/appvideo.flv   -   flv 0   0.000000    0   -   0   0   -   -   -   -   1   -   --  -   -   -   -   -   -   -1  -1.000000   -

  Not sure why request append .flv extension at last like this : rtmp ://10.11.12.202:443/live/appvideo.flv

• Bad file descriptor decoding mp3 to pipe with ffmpeg

  1er février 2017, par Pete Bleackley

  Can any FFMpeg gurus help me with the following ?

  I’m trying to convert a podcast to PCM and downsample it to 16KHz mono before feeding it to a speech recognition system for transcription. The command line

  ffmpeg -i http://media.blubrry.com/conlangery/content.blubrry.com/conlangery/Conlangery01.mp3 -f s16le -ac 1 -ar 16000 pipe:0

  fails with

  av_interleaved_write_frame() : Bad file descriptor

  What is the problem here and how do I fix it ?

  EDIT

  Full error message is

  ffmpeg version N-83189-gd5d474aea5-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.1 (Debian 5.4.1-4) 20161202
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-5 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg
  
    libavutil      55. 44.100 / 55. 44.100
  
    libavcodec     57. 75.100 / 57. 75.100
  
    libavformat    57. 62.100 / 57. 62.100
  
    libavdevice    57.  2.100 / 57.  2.100
  
    libavfilter     6. 69.100 /  6. 69.100
  
    libswscale      4.  3.101 /  4.  3.101
  
    libswresample   2.  4.100 /  2.  4.100
  
    libpostproc    54.  2.100 / 54.  2.100
  
  Input #0, mp3, from 'http://media.blubrry.com/conlangery/content.blubrry.com/conlangery/Conlangery01.mp3':
  
    Metadata:
  
      track           : 1
  
      album           : Conlangery Podcast
  
      title           : Conlangery 01
  
      artist          : George Corley
  
      date            : 2011
  
    Duration: 00:44:58.08, start: 0.025057, bitrate: 128 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
  
      Metadata:
  
        encoder         : LAME3.98r
  
  Output #0, s16le, to 'pipe:0':
  
    Metadata:
  
      track           : 1
  
      album           : Conlangery Podcast
  
      title           : Conlangery 01
  
      artist          : George Corley
  
      date            : 2011
  
      encoder         : Lavf57.62.100
  
      Stream #0:0: Audio: pcm_s16le, 16000 Hz, mono, s16, 256 kb/s
  
      Metadata:
  
        encoder         : Lavc57.75.100 pcm_s16le
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mp3 (native) -> pcm_s16le (native))
  
  Press [q] to stop, [?] for help
  
  av_interleaved_write_frame(): Bad file descriptor
  
  Error writing trailer of pipe:0: Bad file descriptorsize=       1kB time=00:00:00.02 bitrate= 256.0kbits/s speed=95.2x    
  
  video:0kB audio:1kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
  
  Conversion failed!
  
  Traceback (most recent call last):
  
    File "./PodcastTranscriber.py", line 206, in <module>
  
      PodcastTranscriber('http://conlangery.com/feed/',upload)()        
  
    File "./PodcastTranscriber.py", line 101, in __call__
  
      self.process(item)
  
    File "./PodcastTranscriber.py", line 136, in process
  
      (audio,errors)=mp3.run(stdout=subprocess.PIPE)
  
    File "/usr/local/lib/python2.7/site-packages/ffmpy.py", line 105, in run
  
      raise FFRuntimeError(self.cmd, self.process.returncode, out[0], out[1])
  
  ffmpy.FFRuntimeError: `ffmpeg -i http://media.blubrry.com/conlangery/content.blubrry.com/conlangery/Conlangery01.mp3 -f s16le -ac 1 -ar 16000 pipe:0` exited with status 1
  
  </module>

  The invoking code is

  def process(self,item):
  
      """Downloads the audio and transcribes it"""
  
      audio_url=None
  
      print item['title']
  
      for link in item.links:
  
          if link['rel']=='enclosure':
  
              audio_url=link['href']
  
      if audio_url is not None:
  
          pubDate=to_date(item.published_parsed)
  
          if self.lastUploadDate is None or pubDate>self.lastUploadDate:
  
              self.lastUploadDate=pubDate
  
          mp3=ffmpy.FFmpeg(inputs={audio_url:None},
  
                           outputs={'pipe:0':['-f','s16le','-ac','1','-ar','16000']})
  
          (audio,errors)=mp3.run(stdout=subprocess.PIPE)
  
          sphinx=subprocess.Popen(['java','-jar','transcriber.jar'],
  
                                  stdin=audio,
  
                                  stdout=subprocess.PIPE)
  
          wiki=threading.Thread(target=self.callback,args=(item,sphinx.stdout))
  
          wiki.start()
  
          #mp3.start()
  
          #mp3.join()
  
          sphinx.stdin.close()
  
          wiki.join()
  
          sphinx.wait()