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• Reading file stream from Google Cloud Storage to ffmpeg (using fluent-ffmpeg)

  27 juillet 2018, par ekuusi

  I’m trying to run ffmpeg on a NodeJS backend with fluent-ffmpeg, reading input files from Google Cloud Storage. Everything works fine if I download the file first :

  const file = storage
  
      .bucket('example_bucket')
  
      .file('examplefile.mp4');
  
  
  
  file.download({destination: 'test.mp4'}, (err) => {
  
  
  
      let command = ffmpeg()
  
      .input('test.mp4')
  
      .duration(10)
  
      .format('mp4');
  
  
  
      command.save('test_out.mp4');
  
  
  
  });
  
  
  
  res.json([{
  
      message: 'Command sent!'
  
  }]);

  But if I try to use a readable stream as the input, it fails :

  const file = storage
  
      .bucket('example_bucket')
  
      .file('examplefile.mp4');
  
  
  
  
  
  var filestream = file.createReadStream()
  
  
  
  let command = ffmpeg()
  
      .input(filestream)
  
      .duration(10)
  
      .format('mp4');
  
  
  
  
  
  command.save('test_out.mp4');
  
  });
  
  
  
  res.json([{
  
      message: 'Command sent!'
  
  }]);

  Here is the full output of ffmpeg when trying to do the conversion. It seems to read the details of the file fine but for some reason it fails, saying "Cannot process video : ffmpeg exited with code 1 : pipe:0 : Invalid data found when processing input"

  Spawned Ffmpeg with command: ffmpeg -i pipe:0 -y -t 10 -f mp4 test_out.mp4
  
  Stderr output: ffmpeg version 4.0.1 Copyright (c) 2000-2018 the FFmpeg developers
  
  Stderr output:   built with Apple LLVM version 9.1.0 (clang-902.0.39.2)
  
  Stderr output:   configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-librsvg --enable-libtheora --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-libjack --disable-libopencore-amrnb --disable-libopencore-amrwb --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-indev=jack --enable-opencl --disable-outdev=xv --enable-audiotoolbox --enable-videotoolbox --enable-sdl2 --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --arch=x86_64 --enable-x86asm --enable-libx265 --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid
  
  Stderr output:   libavutil      56. 14.100 / 56. 14.100
  
  Stderr output:   libavcodec     58. 18.100 / 58. 18.100
  
  Stderr output:   libavformat    58. 12.100 / 58. 12.100
  
  Stderr output:   libavdevice    58.  3.100 / 58.  3.100
  
  Stderr output:   libavfilter     7. 16.100 /  7. 16.100
  
  Stderr output:   libavresample   4.  0.  0 /  4.  0.  0
  
  Stderr output:   libswscale      5.  1.100 /  5.  1.100
  
  Stderr output:   libswresample   3.  1.100 /  3.  1.100
  
  Stderr output:   libpostproc    55.  1.100 / 55.  1.100
  
  Stderr output: [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb6db80a200] stream 2, offset 0x30: partial file
  
  Stderr output: [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb6db80a200] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 1920x1080, 4647 kb/s): unspecified pixel format
  
  Stderr output: Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Stderr output: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pipe:0':
  
  Stderr output:   Metadata:
  
  Stderr output:     major_brand     : isom
  
  Stderr output:     minor_version   : 512
  
  Stderr output:     compatible_brands: isomiso2avc1mp41
  
  Stderr output:     encoder         : Lavf58.12.100
  
  Stderr output:     location-eng    : +60.2121+024.8754/
  
  Stderr output:     location        : +60.2121+024.8754/
  
  Stderr output:   Duration: 00:02:23.13, bitrate: N/A
  
  Stderr output:     Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none, 1920x1080, 4647 kb/s, SAR 1:1 DAR 16:9, 59.94 fps, 59.94 tbr, 60k tbn, 120k tbc (default)
  
  Stderr output:     Metadata:
  
  Stderr output:       handler_name    : VideoHandler
  
  Stderr output:     Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
  
  Stderr output:     Metadata:
  
  Stderr output:       handler_name    : SoundHandler
  
  Stderr output:     Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
  
  Stderr output:     Metadata:
  
  Stderr output:       handler_name    : TimeCodeHandler
  
  Stderr output: Stream mapping:
  
  Input is aac (mp4a / 0x6134706D) audio with h264 (avc1 / 0x31637661) video
  
  Stderr output:   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
  Stderr output:   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Stderr output: [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fb6db80a200] stream 0, offset 0x34: partial file
  
  Stderr output: pipe:0: Invalid data found when processing input
  
  Stderr output: Cannot determine format of input stream 0:0 after EOF
  
  Stderr output: Error marking filters as finished
  
  Stderr output: Conversion failed!
  
  Stderr output: 
  
  Cannot process video: ffmpeg exited with code 1: pipe:0: Invalid data found when processing input
  
  Cannot determine format of input stream 0:0 after EOF
  
  Error marking filters as finished
  
  Conversion failed!

• ffmpeg demux into audio and video resets PTS

  30 juillet 2018, par Mukund Manikarnike

  Demuxing

  I am demuxing TS segments into audio and video as follows.

  ffmpeg -y -i input.ts -vcodec copy -an output_video.ts
  
  ffmpeg -y -i input.ts -acodec copy -vn output_audio.aac

  Inspecting Input

  The start_pts and start_time on input.ts are as shown below. I was able to inspect these values using ffprobe -show_streams -print_format json input.ts

  "start_pts": 8306558438,
  
  "start_time": "92295.093756",

  Inspecting output video

  The output .ts has some default start_pts and start_time values as shown below. These were also obtained using the same ffprobe command as indicated above.

  "start_pts": 126000,
  
  "start_time": "1.400000",

  Inspecting output audio

  The same ffprobe command on output_audio.aac shows that the output aac has invalid codec_tag and codec_tag_string as shown below. The start_pts and start_time are not present in the output_audio.aac.

  "codec_tag_string": "[0][0][0][0]", (should have been [15][0][0][0])
  
  "codec_tag": "0x0000", (should have been 0xf000)

  Questions

  1. Wondering if this difference in the start_pts, start_time, codec_tag is expected ?
  2. If it is expected, what can I do to ensure that the all of these parameters get retained on the output ?
  3. If it is not expected, is there some more information I can share to track this down ?

  Note

  There were other outputs that I found inconsistent in the ffprobe command for the output_audio.aac like duration etc.. I shared what I thought are most valuable at this point. If required I can share complete outputs from all of the above executions.

  [EDIT 07/30/2018 - 08:00 MST]
  logs for ffmpeg -y -i input.ts -vcodec copy -an output_video.ts -acodec copy -vn output_audio.aacare as shown below.

  ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/4.0.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.3.0/include/openjpeg-2.3 --enable-nonfree
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libavresample   4.  0.  0 /  4.  0.  0
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  [mpegts @ 0x7f88ed803000] start time for stream 0 is not set in estimate_timings_from_pts
  
  Input #0, mpegts, from 'i7h9456s_media_46185.ts':
  
    Duration: 00:00:06.05, start: 86216.852667, bitrate: 2898 kb/s
  
    Program 1 
  
      Stream #0:0[0x102]: Data: timed_id3 (ID3  / 0x20334449)
  
      Stream #0:1[0x100]: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p(tv, smpte170m, progressive), 640x360 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:2[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 190 kb/s
  
  Output #0, mpegts, to '../output_video.ts':
  
    Metadata:
  
      encoder         : Lavf58.12.100
  
      Stream #0:0: Video: h264 (Constrained Baseline) ([27][0][0][0] / 0x001B), yuv420p(tv, smpte170m, progressive), 640x360 [SAR 1:1 DAR 16:9], q=2-31, 29.97 fps, 29.97 tbr, 90k tbn, 90k tbc
  
  Output #1, adts, to '../output_audio.aac':
  
    Metadata:
  
      encoder         : Lavf58.12.100
  
      Stream #1:0: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, stereo, fltp, 190 kb/s
  
  Stream mapping:
  
    Stream #0:1 -> #0:0 (copy)
  
    Stream #0:2 -> #1:0 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=  180 fps=0.0 q=-1.0 Lsize=    2088kB time=00:00:06.03 bitrate=2833.8kbits/s speed= 904x    
  
  video:1918kB audio:142kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.349750%

• ffmpeg with "-pattern_type glob" and variable in bash script

  20 juin 2019, par KlausPeter

  I’m trying to let ffmpeg make a video of all pictures in a directory using the -pattern_type glob switch and "/foo/bar/*.jpg". This works well, if I execute the command manually für just one directory. For example :

  ffmpeg -framerate 35 -pattern_type glob -i '/root/webcam_test/2018-07-21/*.jpg' -vf scale=1280:-1 -c -c:v libx264 -pix_fmt yuv420p /root/clips/out01_cut.mp4

  However, if I do it in a bash script and set the path via a variable, according to ffmpegs output, the variable gets substituted correctly, but ffmpeg states that

  ’/root/webcam_test/2018-07-21/*.jpg’ : No such file or directory

  The part of the script looks like this :

  for D in `find /root/webcam_test/ -type d`
  
  do
  
      [...]
  
      cmd="ffmpeg -framerate 35 -pattern_type glob -i '$D/*.jpg' -vf scale=1280:-1 -c -c:v libx264 -pix_fm                                 t yuv420p /root/clips/$d_cut.mp4"
  
      echo $cmd
  
  [...]
  
  done

  Does anyone know how to make ffmpeg do its wildcard interpretation even if the path is constructed by a script and not just try to plainly use the given path ?
  Best regards and thanks in advance