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• Re-encoding vlc-created mpeg2 .ts file results in 20 second file ; AKA : multi-stream file with hidden streams

  23 novembre 2016, par insaner

  I was recording something with vlc off v4l2 (in case that makes a difference), and I just selected the first format that worked, being mpeg2 using TS container. File resulted in .ts extension, as automatically selected by vlc. When I then tried to put the video file in my video editor, it said the video was 19,884 hours long, when it should be about 6 minutes (it is 80mb in size). When I try to play it in xine, it correctly shows the duration (vlc doesn’t), and when I use ffprobe :

  [mpegts @ 0x9b2c0a0] max_analyze_duration 5000000 reached at 5000000
  
  Input #0, mpegts, from 'loopbacktestcap.ts':   Duration: N/A, start:
  
  17978.139456, bitrate: N/A   Program 1 
  
       Stream #0:0[0x44](): Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 104857 kb/s, 30 fps, 30
  
  tbr, 90k tbn, 60 tbc
  
       Stream #0:1[0x46](): Video: mpeg2video ([2][0][0][0] / 0x0002), 90k tbn

  Notice especially this line :

     Duration: N/A, start: 17978.139456, bitrate: N/A   Program 1 

  I looked it up and it seems the lack of duration has to do with the container. But I have tried a few things to reencode (I tried -vcodec copy, mpeg2, libx264...) and all I can get is 20 second files of 1.1mb - 1.8mb.

  So how can I reencode this file so the duration appears, and I get the full 6 minutes, instead of just the first 20 seconds ?

• Re-encoding vlc-created mpeg2 .ts file results in 20 second file ; AKA : multi-stream file with hidden streams

  6 septembre 2017, par insaner

  I was recording something with vlc off v4l2 (in case that makes a difference), and I just selected the first format that worked, being mpeg2 using TS container. File resulted in .ts extension, as automatically selected by vlc. When I then tried to put the video file in my video editor, it said the video was 19,884 hours long, when it should be about 6 minutes (it is 80mb in size). When I try to play it in xine, it correctly shows the duration (vlc doesn’t), and when I use ffprobe :

  [mpegts @ 0x9b2c0a0] max_analyze_duration 5000000 reached at 5000000
  
  Input #0, mpegts, from 'loopbacktestcap.ts':   Duration: N/A, start:
  
  17978.139456, bitrate: N/A   Program 1 
  
       Stream #0:0[0x44](): Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 104857 kb/s, 30 fps, 30
  
  tbr, 90k tbn, 60 tbc
  
       Stream #0:1[0x46](): Video: mpeg2video ([2][0][0][0] / 0x0002), 90k tbn

  Notice especially this line :

     Duration: N/A, start: 17978.139456, bitrate: N/A   Program 1 

  I looked it up and it seems the lack of duration has to do with the container. But I have tried a few things to reencode (I tried -vcodec copy, mpeg2, libx264...) and all I can get is 20 second files of 1.1mb - 1.8mb.

  So how can I reencode this file so the duration appears, and I get the full 6 minutes, instead of just the first 20 seconds ?

• FFMPEG mp3 file segmentation on Mac OSx Error . Only one full mp3 file generated as segmented file

  2 novembre 2017, par iThirst

  What I am trying to achieve is to take an MP3 file as source file and generate multiple segments of approx 10s each from it. I am using node’s fluent ffmpeg inside node js application. Below code works absolutely fine and generates proper results on Linux/Ubuntu 16.04 server while fails with below error on mac osx. It ends by generating single .mp3 file and .m3u8 playlist file on mac osx while it generates multiple segmented mp3 files (each 11s) if executed on ubuntu server.

  Error Log: 
  
  [mp3 @ 0x7fc469010c00] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 9223372036854422218 >= -9223372033278215478
  
  [segment @ 0x7fc469006a00] Packets poorly interleaved, failed to avoid negative timestamp -9223372033277846838 in stream 0.

  // Node js code to execute ffmpeg command is given below

  var command = ffmpeg(fs.createReadStream(directoryPath + fileName), {timeout : 900})
  
                      .inputFormat('mp3')
  
                      .inputOptions([                    
  
                          //'-re',
  
                          //'-i input.mp3',
  
                          //directoryPath +'albumart.jpg',
  
                          '-codec copy',
  
                          '-map 0',
  
                          '-f segment',
  
                          '-segment_list ' + directoryPath + fileName_noExtension + '.m3u8',
  
                          '-segment_list_flags +live',
  
                          '-segment_time 10',
  
                           directoryPath + 'out%03d.mp3'
  
                      ]);
  
   command.on('start',{}).on('stderror').on('end').output(directoryPath +  'Out.mp3')
  
          .run()

  //

  Any help is appreciated in this direction.