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• FFmpeg : concatenate m4v-files while preserving vobsub subtitles ?

  27 octobre 2020, par Nick

  I'm trying to concatenate two h.264-m4v files using ffmpeg. At least one of the source files (at least the second, not necessarily the first) contains subtitles in the vobsub format. The source files were created using HandBrake which allows for vobsub inclusion in m4v-containers. The files are exactly the same codec, same resolution, same type.

  


  Let's suppose the source files are called 1.m4v and 2.m4v. The 2.m4v-file contains the following streams which I want to have included in the output file :

  


      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt470bg), 702x574 [SAR 16:15 DAR 1872:1435], 607 kb/s, 25 fps, 25 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      creation_time   : 2020-10-11T16:02:38.000000Z
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 350 kb/s (default)
    Metadata:
      creation_time   : 2020-10-11T16:02:38.000000Z
      handler_name    : Stereo
    Stream #0:2(eng): Subtitle: dvd_subtitle (mp4s / 0x7334706D), 720x576, 3 kb/s (default)
    Metadata:
      creation_time   : 2020-10-11T16:02:38.000000Z
      handler_name    : SubtitleHandler
    Stream #0:3(eng): Data: bin_data (text / 0x74786574)
    Metadata:
      creation_time   : 2020-10-11T16:02:38.000000Z
      handler_name    : SubtitleHandler


  


  The two files are included in a sources.txt file containing the following lines :

  


  file '1.m4v'
file '2.m4v'


  


  The command in ffmpeg is then executed as follows :

  


  $ ffmpeg -f concat -safe 0 -i sources.txt -c copy output.m4v


  


  The resulting file correctly combines 1 and 2 with all their audio and video streams. However, the subtitle streams are omitted by ffmpeg. The output.m4v file does not contain them (Stream #0:2(eng) and Stream #0:3(eng) are not present) :

  


      Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt470bg), 702x576 [SAR 16:15 DAR 13:10], 626 kb/s, 25 fps, 25 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 349 kb/s (default)
    Metadata:
      handler_name    : Stereo


  


  This also happens if I alter the command to use -scodec copy as an option. In this case, the joining-process fails with the following error :

  


  [ipod @ 0x7f7faa00c000] Could not find tag for codec dvd_subtitle in stream #2, codec not currently supported in container
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 -- 


  


  Any idea on how to join the two files while preserving the vobsubs in the resulting m4v-container ?

  


• ffmpeg - DF vs NDF (Drop Frames) vs (Non Drop Frames), how to simply pass input timecode to output

  24 septembre 2020, par Selene

  Please help with this issue. The broadcaster just rejected my submitted video because their validation tool threw this kind of error :

  


  


  was configured as "Non drop Frame". "Drop Frame" expected.

  


  


  I'm only processing video, and I expect the audio to just be copied from input to output.
Running and comparing input with output using ffprobe shows difference in timecode :

  


    Metadata:
    major_brand     : qt  
    minor_version   : 537199360
    compatible_brands: qt  
    creation_time   : 2020-02-29T22:07:42.000000Z
  Duration: 00:00:20.05, start: 0.000000, bitrate: 133935 kb/s
    Stream #0:0(eng): Video: dvvideo (dvh6 / 0x36687664), yuv422p(bt709, top coded first (swapped)), 1280x1080 [SAR 3:2 DAR 16:9], 115084 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 29.97 tbc (default)
    Metadata:
      creation_time   : 2020-02-29T22:07:42.000000Z
      handler_name    : Apple Video Media Handler
      encoder         : DVCPRO HD 1080i60
      timecode        : 00:00:00;00
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2020-02-29T22:07:42.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00;00
    Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2020-02-29T22:07:42.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00;00
    Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      creation_time   : 2020-02-29T22:07:42.000000Z
      handler_name    : Apple Sound Media Handler
      timecode        : 00:00:00;00


  


  After video conversion, the output of ffprobe :

  


    Metadata:
    major_brand     : qt  
    minor_version   : 512
    compatible_brands: qt  
    encoder         : Lavf58.58.100
  Duration: 00:00:20.05, start: 0.000000, bitrate: 167037 kb/s
    Stream #0:0(eng): Video: prores (XQ) (ap4x / 0x78347061), yuv422p12le(tv, bt709, top coded first (swapped)), 1920x1080, 148578 kb/s, SAR 1:1 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
    Metadata:
      handler_name    : Apple Video Media Handler
      encoder         : Lavc58.106.100 prores_ks
      timecode        : 00:00:00:00
    Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      handler_name    : Apple Sound Media Handler
    Stream #0:2(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      handler_name    : Apple Sound Media Handler
    Stream #0:3(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, 1 channels, s32 (24 bit), 1152 kb/s (default)
    Metadata:
      handler_name    : Apple Sound Media Handler


  


  My encoding string looks like this :

  


  ffmpeg -i input.mov -vf scale=1920x1080 -map 0:v? -map 0:a? -map 0:s? -map 0:d? -b:v 115084915 -maxrate 115084915 -minrate 115084915 -c:v prores_ks -profile:v 5 -preset ultrafast -crf 0 -c:a copy -c:s copy -y output.mov


  


  Please help !

  


• How to install ffmpeg on Google App Engine ?

  1er avril 2024, par london_utku

  I intend to install ffmpeg and ffprobe to my Google App Engine flex environment, how can I do this with requirements.txt as a package ?

  



  I am currently using ffmpeg-python yet, this is only a wrapper.

  



  ffmpeg-python==0.2.0
ffprobe-python==1.0.3


  



  Below is the error when I try to use ffmpeg-python wrapper, which is expected as there is no ffmpeg and ffprobe available :

  



  2020-05-03 11:42:36 default[20200503t112932]  [03/May/2020 11:42:36] ERROR    [log.py:228] Internal Server Error: /capture_thumbnail/
2020-05-03 11:42:36 default[20200503t112932]  Traceback (most recent call last):    File "/env/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner      response = get_response(request)    File "/env/lib/python3.6/site-packages/django/core/handlers/base.py", line 115, in _get_response      response = self.process_exception_by_middleware(e, request)    File "/env/lib/python3.6/site-packages/django/core/handlers/base.py", line 113, in _get_response      response = wrapped_callback(request, *callback_args, **callback_kwargs)    File "/home/vmagent/app/core/views.py", line 62, in capture_thumbnail      generate_thumbnail(request, blob_uuid)    File "/home/vmagent/app/core/videointelligence1.py", line 264, in generate_thumbnail      probe = ffmpeg.probe(video_url)    File "/env/lib/python3.6/site-packages/ffmpeg/_probe.py", line 20, in probe      p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)    File "/opt/python3.6/lib/python3.6/subprocess.py", line 729, in __init__      restore_signals, start_new_session)    File "/opt/python3.6/lib/python3.6/subprocess.py", line 1364, in _execute_child      raise child_exception_type(errno_num, err_msg, err_filename)  FileNotFoundError: [Errno 2] No such file or directory: 'ffprobe': 'ffprobe'


  



  Can you please suggest a way, so I can use ffprobe on Google App Engine.