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• Including Youtube-dl in FFMPEG not working in Bash (OSX)

  14 juillet 2019, par user1029296

  I am trying to download 5 second samples for a list of youtube video. The traditional approach is to download the entire file with "youtube-dl" and then use "ffmpeg" to split it however you want it.

  I am trying to use the following method : https://github.com/ytdl-org/youtube-dl/issues/622#issuecomment-162337869

  It does work when I include the variables in the command, for example :

  ffmpeg -ss 0 -i $(youtube-dl -f best --get-url https://www.youtube.com/watch?v=ySVi-0RS5vI&t=5s) -t 10 -c:v copy -c:a copy title2.mp4

  However, I am having issues trying to automate the system. Specifically, I would like ffmpeg and youtube-dl to read a file and use the values. I created the file "youtube.txt" which includes the following codes :

  440.8,https://www.youtube.com/watch?v=0-4wOE_DNeA,661.2,881.6,0-4wOE_DNeA
  
  330,https://www.youtube.com/watch?v=0-AMWW6tHzw,495,660,0-AMWW6tHzw
  
  509.2,https://www.youtube.com/watch?v=0-Rmto2rgMw,763.8,1018.4,0-Rmto2rgMw
  
  427.6,https://www.youtube.com/watch?v=0-U53qm45cA,641.4,855.2,0-U53qm45cA
  
  320.4,https://www.youtube.com/watch?v=0-dja9Ys4Sg,480.6,640.8,0-dja9Ys4Sg
  
  343.6,https://www.youtube.com/watch?v=0-g_PulsqtM,515.4,687.2,0-g_PulsqtM
  
  415.6,https://www.youtube.com/watch?v=0-nniRyn7dU,623.4,831.2,0-nniRyn7dU
  
  431.2,https://www.youtube.com/watch?v=006BQU3BFxw,646.8,862.4,006BQU3BFxw

  I am using the following command :

  parallel -j 6 --colsep ',' ffmpeg -ss {1} -i $(youtube-dl -f best --get-url {2}) --t 5 -c:v copy -c:a copy {5} :::: youtube.txt

  However, I get the following errors :

  ERROR: '{2}' is not a valid URL. Set --default-search "ytsearch" (or run  youtube-dl "ytsearch:{2}" ) to search YouTube
  
  --t: No such file or directory

  Would you mind helping me ?

  Thanks !

• Ubuntu reduce video size with ffmepg and change format

  27 juillet 2015, par Arnas Pečelis

  I want to watermark, reduce weigth, resize and change format for selected videos.
  Also I need to keep quality as high as it possible.

  Now what I have :

  ffmpeg -i prepared/video.mp4 -i units/video_watermark.png -filter_complex overlay=10:10 -codec:a copy moved/video_test.mp4

  and I’m watermarking video, but the quality drops a lot. Also I have :

  ffmpeg -i prepared/video.mp4 -s 1280x720 -b 512k -vcodec mpeg1video -acodec copy

  but also I need to reduce weight also as lot as possible. The reconstructed videos will be shown as movies online. My question would be - is it possible to do it one line and change format to .mp4 ?

  PS. I have constructed command :

  ffmpeg -i downloaded/movie/movie.avi -c:v libx264 -acodec libfaac -b:a 64k -preset ultrafast -vf "movie=units/video_watermark.png [watermark]; [in][watermark] overlay=10:10 [out]" -movflags faststart prepared/movie.mp4

  but it returns me error :

  ffmpeg version 2.7.1 Copyright (c) 2000-2015 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
  
    configuration:
  
    libavutil      54. 27.100 / 54. 27.100
  
    libavcodec     56. 41.100 / 56. 41.100
  
    libavformat    56. 36.100 / 56. 36.100
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 16.101 /  5. 16.101
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.100 /  1.  2.100
  
  Unrecognized option 'preset'.
  
  Error splitting the argument list: Option not found

• using ffmpeg to convert a mkv or mp4 suitable for a DVD player that supports MPEG-4 / DivX [closed]

  17 juillet 2022, par Neil Telford

  I got a DVD Player with USB support. It is a recent player (DVD-225), but the documentation is sparse, but it does claim MPEG-4 and DivX support.

  


  Now, I have got certain AVI files to play via USB, but everything else fails. I looked at the metadata of an AVI file that worked via ffprobe, and got the following :

  


  Metadata:
    encoder         : Lavf58.17.101   Duration: 00:58:30.94, start: 0.000000, bitrate: 1336 kb/s
    Stream #0:0: Video: mpeg4 (Simple Profile) (xvid / 0x64697678), yuv420p, 640x290 [SAR 1:1 DAR 64:29], 1196 kb/s, 23.98 fps, 23.98 tbr,
23.98 tbn, 23.98 tbc
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, fltp, 128 kb/s


  


  Now, I figured that if I can replicate the above, I can convert most things to play via USB, even if it isn't the most up to date codecs.

  


  I've tried various combinations, but they all fail. The closest I got was by using the following shell script :

  


  for i in *.avi; do ffmpeg -i "$i" -c:v mpeg4 -vtag divx -qscale:v 3 -c:a libmp3lame -qscale:a 4 "_${i%.*}.avi"; done


  


  This has a strange result that it will play the audio track, but not the video track. The metadata I got from this was :

  


  Metadata:
    encoder         : Lavf58.45.100
  Duration: 00:58:07.99, start: 0.000000, bitrate: 3026 kb/s
    Stream #0:0: Video: mpeg4 (Simple Profile) (divx / 0x78766964), yuv420p, 1280x720 [SAR 3:4 DAR 4:3], 2901 kb/s, 23.98 fps, 23.98 tbr, 23.98 tbn, 24k tbc
    Metadata:
      title           : ******************
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, fltp, 109 kb/s
    Metadata:
      title           : ******************


  


  Does anyone know where I am going wrong with this ? I've converted AVI, MKV and MP4 files, and while they work on my computer, the DVD player seems to be very picky.

  


  Any suggestions ?

  


  Thanks
Neil