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• Fluent-FFmpeg Blocks any server activity

  3 mars 2013, par user2009114

  I'm having an issue where fluent-ffmpeg will actually make the server hang until it has transcoded a video. I have a script checking if any files need transcoding with Meteor.js server and then calling a fluent-ffmpeg process if needed for those videos. However, when I do this, the server actually can't do anything until fluent-ffmpeg is down transcoding the videos. It just hangs. Is there a way I can get around this ? Can I spawn another thread with node.js for this ? Or maybe there is a setting in fluent ffmpeg that will allow a workaround ?

  Here is my code :

  var x = 0;
  
  var transcodeAll = function(files){
  
      console.log("X", x);
  
      dead_transcode(files[x],function(){
  
          x++;
  
          console.log("In callback");
  
          if(x/ Remove ".." etc
  
      var rootfile = path.join(rootPath, file);
  
      var output = file.substr(0, file.lastIndexOf('.')) || file;
  
      newfile = path.join(rootPath, "/transcoded"+output +".mp4");
  
      console.log(rootfile);
  
      console.log(newfile);
  
  lock=true;
  
  var proc = new ffmpeg({ source: rootfile, priority: 10 })
  
  .toFormat('mp4')
  
  //.withVideoBitrate('1500k')
  
  .withVideoCodec('libx264')
  
  //.withSize('720x?')
  
  //.withAudioBitrate('128k')
  
  .withAudioCodec('libfaac')
  
  .saveToFile(newfile, function(stdout, stderr) {
  
      console.log('file has been converted succesfully');
  
      lock = false;
  
      console.log(stdout);
  
      console.log(stderr);
  
      callback();
  
  });
  
  
  
  }

• Converting from MXF to MPEG format with FFmpeg [migrated]

  2 mars 2013, par user2060812

  We're trying to convert .mxf video to .mpeg on ffmpeg-0.9.2 and looks like 0.9.2 version doesn't support .mxf conversion to .mpeg.

  We don't want to switch on latest 0.11 version of ffmpeg as the video result is too poor for latest version. Maybe we're not using the right command to convert .mxf format.

  Below is the error on conversion command :

  [root@localhost ~]# ffmpeg -i test.mxf  -ac 2 output.mpg                                                                                     ffmpeg version 0.9.2-syslint, Copyright (c) 2000-2012 the FFmpeg developers
  
    built on Mar  1 2013 22:34:33 with gcc 4.6.3
  
    configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
  
    libavutil    51. 32. 0 / 51. 54.100
  
    libavcodec   53. 42. 4 / 53. 42. 4
  
    libavformat  53. 24. 2 / 53. 24. 2
  
    libavdevice  53.  4. 0 / 53.  4. 0
  
    libavfilter   2. 53. 0 /  2. 77.100
  
    libswscale    2.  1. 0 /  2.  1.100
  
    libpostproc  51.  2. 0 / 51.  2. 0
  
  Input #0, mxf, from `test.mxf`:
  
    Duration: 00:00:07.04, start: 0.000000, bitrate: 62580 kb/s
  
      Stream #0:0: Video: mpeg2video (4:2:2), yuv422p, 720x608 [SAR 608:405 DAR 16:9], 50000 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
  
      Stream #0:1: Audio: pcm_s16le, 48000 Hz, 8 channels, s16, 6144 kb/s
  
  File `output.mpg` already exists. Overwrite ? [y/N] y
  
  Incompatible pixel format `yuv422p` for codec `mpeg1video`, auto-selecting format `yuv420p`
  
  [buffer @ 0x8476e0] w:720 h:608 pixfmt:yuv422p tb:1/1000000 sar:608/405 sws_param:
  
  [buffersink @ 0x847b80] auto-inserting filter `auto-inserted scaler 0` between the filter `src` and the filter `out`
  
  [scale @ 0x848220] w:720 h:608 fmt:yuv422p sar:608/405 -> w:720 h:608 fmt:yuv420p sar:608/405 flags:0x4
  
  [mpeg @ 0x84a7a0] VBV buffer size not set, muxing may fail
  
  Output #0, mpeg, to `output.mpg`:
  
    Metadata:
  
      encoder         : Lavf53.24.2
  
      Stream #0:0: Video: mpeg1video, yuv420p, 720x608 [SAR 608:405 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc
  
      Stream #0:1: Audio: mp2, 48000 Hz, 2 channels, s16, 128 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mpeg2video -> mpeg1video)
  
    Stream #0:1 -> #0:1 (pcm_s16le -> mp2)
  
  Press [q] to stop, [?] for help
  
  [buffer @ 0x8476e0] Changing frame properties on the fly is not supported.
  
  Failed to inject frame into filter network

• lavfi/drawbox : restore verbal form for drawbox options descriptions

  17 mai 2013, par Stefano Sabatini

  lavfi/drawbox : restore verbal form for drawbox options descriptions
  

  • [DH] libavfilter/vf_drawbox.c