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• Creating automated ffmpeg converter

  27 janvier 2019, par Jeffrey Moser

  I am trying to create an automated process using ffmpeg and am having issues understanding how to adapt the code to automator.

  The code works beautifully in the terminal, but requires each filename to me entered manually. I am trying to automate the process.

  for f in "$@"
  
  do
  
  
  
  FILE= "$f"
  
  OUT=${FILE/mp4/png}
  
  OUT_WIDTH=10800
  
  OUT_HEIGHT=3600
  
  
  
  eval $(ffprobe -v error -of flat=s=_ -select_streams v:0 -show_entries stream=height,width "${FILE}")
  
  IN_WIDTH=${streams_stream_0_width}
  
  IN_HEIGHT=${streams_stream_0_height}
  
  
  
   eval $(ffprobe -v error -of flat=s=_ -count_frames -select_streams v:0 -show_entries stream=nb_read_frames "${FILE}")
  
  IN_FRAMES=${streams_stream_0_nb_read_frames}
  
  
  
  W_TILES=$(bc <<< "(sqrt($OUT_WIDTH*$IN_FRAMES*$IN_HEIGHT/($IN_WIDTH*$OUT_HEIGHT))+3)")
  
  H_TILES=$(bc <<< "(sqrt($OUT_HEIGHT*$IN_FRAMES*$IN_WIDTH/($OUT_WIDTH*$IN_HEIGHT)))")
  
  
  
  W_SHRUNK=$(bc <<< "$OUT_WIDTH/$W_TILES")
  
  H_SHRUNK=$(bc <<< "$OUT_HEIGHT/$H_TILES")
  
  
  
  ffmpeg -i "${FILE}" -vf "hflip,transpose=cclock,scale=${H_SHRUNK}:${W_SHRUNK},tile=${H_TILES}x${W_TILES},transpose=clock,hflip,scale=${OUT_WIDTH}x${OUT_HEIGHT}" -an -sn -vsync 0 "${OUT}"
  
  
  
  
  
  done

  I expected the code to produce an image of every frame of the film. But instead I got a massive error message.

  The action “Run Shell Script” encountered an error: “-: line 5: /Users/jeffreymoser/21 A New Dawn.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found
  
  -: line 5: /Users/jeffreymoser/22 Battle Hymn.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found
  
  -: line 5: /Users/jeffreymoser/23 Reckless.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found
  
  -: line 5: /Users/jeffreymoser/24 Showdown.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found
  
  -: line 5: /Users/jeffreymoser/25 Wedding Bells.mp4: Permission denied
  
  -: line 14: ffprobe: command not found
  
  -: line 18: ffprobe: command not found
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 1: parse error
  
  (standard_in) 2: parse error
  
  (standard_in) 2: parse error
  
  -: line 29: ffmpeg: command not found

• Extracting aspect ratio from ffprobe

  29 décembre 2020, par Linx

  I'm using ffprobe to determine a video's properties and assign them as variables in a bash script for batch encoding with ffmpeg, like so :

  


  eval $(ffprobe -v quiet -show_format -of flat=s=_ -show_entries 
        stream=height,width,duration,display_aspect_ratio "$f");
        width=${streams_stream_0_width};
        height=${streams_stream_0_height};
        aspect=${streams_stream_0_display_aspect_ratio};
    
    echo -e "Height/Width = $height/$width, Aspect = $aspect\n";


  


  That returns "Height/Width = 480/720, Aspect = 4:3" exactly like it should. But I need to insert the variable into my encode command as 4/3 and not 4:3. I'm not very good with bash scripting and I've searched for a solution, but I'm not even sure what you call what I'm trying to do, so I'm sure I've done the wrong search terms. How can I convert this ratio into a fraction to insert into a ffmpeg command ?

  


• avcodec/wavpack : Use ThreadProgress API

  11 août 2022, par Andreas Rheinhardt

  avcodec/wavpack : Use ThreadProgress API
  It is more natural given that WavPack doesn't need the data of
  
  the previous frame at all ; it just needs the DSD context.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/wavpack.c