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• Merge and Concat Multiple Audio and Video files using FFMPEG

  20 décembre 2018, par mattgi

  I have a script at present that results in several audio-only and video-only files.

  My goal is to take these and then concat each video clip whilst merging in the audio-clips.

  I thought this would be easy but I have not been able to find a good example to work from.

  FFMPEG.org suggests that the movie/amovie input syntax could be the best option.. but am craving more doco. FFMPEG’s information on the topic is @
  https://www.ffmpeg.org/ffmpeg-filters.html#Examples-124. It suggests that to "...Concatenate two parts, handling audio and video separately" we should be able to use the "(a)movie sources" and includes this example :

  movie=part1.mp4, scale=512:288 [v1] ; amovie=part1.mp4 [a1] ;
  
  movie=part2.mp4, scale=512:288 [v2] ; amovie=part2.mp4 [a2] ;
  
  [v1] [v2] concat [outv] ; [a1] [a2] concat=v=0:a=1 [outa]

  I have tried this myself without any success :

  -f lavfi
  
  -i amovie=/clips/1-0.mp3 [a0];
  
     movie=/clips/1-1-overlayed.mp4 [v1];
  
     amovie=/clips/1-2.mp3 [a2];
  
     movie=/clips/1-3-overlayed.mp4 [v3];
  
     amovie=/clips/1-4.mp3 [a4];
  
     movie=/clips/1-5-overlayed.mp4 [v5];
  
     [v1] [v3] [v5] concat=n=3 "[outv]" ; [a0] [a2] [a4] concat=n=3:v=0:a=1 "[outa]"
  
  -map "[outv]"
  
  -map "[outa]"
  
  output.mp4

  gives :

  "[outa]": Invalid argument

  Any ideas on how to get this working ? (doesn’t have to use the same movie/amovie constructs, my main requirement is that I have an array of items and need to produce a video from them, that is a concat of each video, and a merge of each audio.

  ...

  When I use regular concat, I get this error :

  [mp3 @ 0x7fd200003a00] Estimating duration from bitrate, this may be inaccurate
  
  Input #0, mp3, from '/clips/1-0.mp3':
  
    Duration: 00:00:04.27, start: 0.000000, bitrate: 32 kb/s
  
      Stream #0:0: Audio: mp3, 24000 Hz, mono, fltp, 32 kb/s
  
  Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/clips/1-1-overlayed.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
    Duration: 00:00:04.28, start: 0.000000, bitrate: 28 kb/s
  
      Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 3:4 DAR 4:3], 24 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  [mp3 @ 0x7fd20080ac00] Estimating duration from bitrate, this may be inaccurate
  
  Input #2, mp3, from '/clips/1-2.mp3':
  
    Duration: 00:00:14.38, start: 0.000000, bitrate: 32 kb/s
  
      Stream #2:0: Audio: mp3, 24000 Hz, mono, fltp, 32 kb/s
  
  Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '/clips/1-3-overlayed.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
    Duration: 00:00:14.36, start: 0.000000, bitrate: 530 kb/s
  
      Stream #3:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 528 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  [mp3 @ 0x7fd20100d200] Estimating duration from bitrate, this may be inaccurate
  
  Input #4, mp3, from '/clips/1-4.mp3':
  
    Duration: 00:00:02.78, start: 0.000000, bitrate: 32 kb/s
  
      Stream #4:0: Audio: mp3, 24000 Hz, mono, fltp, 32 kb/s
  
  Input #5, mov,mp4,m4a,3gp,3g2,mj2, from '/clips/1-5-overlayed.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
    Duration: 00:00:02.80, start: 0.000000, bitrate: 34 kb/s
  
      Stream #5:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 3:4 DAR 4:3], 29 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler
  
  Stream specifier ':a' in filtergraph description [0:a][1:v][2:a][3:v][4:a][5:v]concat=n=3:v=1:a=1[v][a] matches no streams.

  The input (via NodeJS wrapper) looks like this :

  FFmpeg {
  
    options:
  
     [ '-hide_banner',
  
       '-y',
  
       '-i',
  
       '/clips/1-0.mp3',
  
       '-i',
  
       '/clips/1-1-overlayed.mp4',
  
       '-i',
  
       '/clips/1-2.mp3',
  
       '-i',
  
       '/clips/1-3-overlayed.mp4',
  
       '-i',
  
       '/clips/1-4.mp3',
  
       '-i',
  
       '/clips/1-5-overlayed.mp4',
  
       '-filter_complex',
  
       '[0:a][1:v][2:a][3:v][4:a][5:v]concat=n=3:v=1:a=1[v][a]',
  
       '-map',
  
       '[v]',
  
       '-map',
  
       '[a]',
  
       '/projects/1.mp4' ],
  
    outputFilename: '' }

• batch - run command through directory and sub-directory

  30 août 2015, par user1901188

  I’m writing a quick little batch script that will use ffmpeg to create gif’s from short movie clips.

  I’m having trouble figuring out how to get it to run the ffmpeg commands in the for loop on any subfolders (and movies within them) . I was trying to use -r but that doesn’t seem to work. I am pretty new to this, and I have kind of bashed my way through with this script. Any help would be greatly appreciated

  ECHO Movie Dir, please?
  
  SET /p movdir=
  
  
  
  IF EXIST "%movdir%" (
  
  MKDIR "%movdir%\palgen"
  
  MKDIR "%movdir%\gif"
  
  
  
  FOR %%a in ("%movdir%\*.mov*") do (
  
  "%ffmpeg%\ffmpeg" -i "%%a" -vf fps="%fps%",scale="%scale%":flags=lanczos,palettegen -y "%movdir%\palgen\%%~na.bmp"
  
  "%ffmpeg%\ffmpeg" -i "%%a" -i "%movdir%\palgen\%%~na.bmp" -lavfi fps="%fps%",scale="%scale%":flags=lanczos,paletteuse -y "%movdir%\gif\%%~na.gif"
  
  )
  
  
  
  ) ELSE (
  
  ECHO That Directory doesn't exist, try again 
  
  GOTO Start
  
  )
  
  
  
  RD /s /q "%movdir%\palgen"
  
  ECHO All Done, bye :)

• php-ffmpeg too slow - generating thumbnails ?

  25 avril 2013, par Wiggler Jtag

  first time I am trying to create thumbnail preview from video file, uploaded 700mb .avi film with 209747 frames. Now I am trying to create 1 thumbnail, but it takes 4.7 seconds, because I've set frame 10000, if I set it just to 1000, it takes only 0.4 seconds to generate thumbnail.

  How could I generate like 5-10 thumbnails from different frames on-the-go in less than a second ? Is it even possible ? Is it different to use exec(ffmpeg) or php-ffmpeg ?
  Using 0.6-svn ffmpeg, Debian 6.0.7, php 5.4.14 on machine 2x Xeon L5420 and still slow... Any ideas ? How about to use ffmpeg + time of the video instead of frame ?

  $movie = 'ai.avi';
  
  $thumbnail = 'thumbnail.jpg';
  
  
  
  $mov = new ffmpeg_movie($movie);
  
  $frame = 10000;
  
  $frame = $mov->getFrame($frame);
  
  
  
  if($frame) { 
  
    $gd_image = $frame->toGDImage();
  
    if($gd_image) {
  
      imagejpeg($gd_image, $thumbnail, 100);
  
      imagedestroy($gd_image);
  
    }
  
  }
  
  echo &#39;<img src="http://stackoverflow.com/feeds/tag/&#39;.$thumbnail.&#39;" style='max-width: 300px; max-height: 300px' /><br />&#39;;