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• Batch process audio files and image files to create movie files by matching multiple wildcard values

  29 septembre 2022, par psychaudio

  I'm attempting to batch-process audio and image files to create video files using a Shell script with FFmpeg.

  


  

  1. The ffmpeg script works in Terminal :

  


  


  ffmpeg -loop 1 -i image.png -i audio.wav -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest output.mp4


  


  

  2. A nested for loop with wildcards works as a batch script :

  


  


  #!/bin/sh
for img in *.png; do
    for wav in *.wav; do
        ffmpeg -loop 1 -i $img -i $wav -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest ../mb/$img.mp4
    done
done


  


  The only problem here is that it creates more combinations than I need. I'd like to be able to match wildcard values and only mix those together. I'd like to be able to prepare the filenames to match in advance to make this easier : For example, only match 1.png with 1.wav to make 1.mp4, 2.png with 2.wav to make 2.mp4 and so on. I'm able to modify the script to match the wildcards in a Regex, but I'm not sure if there is a way to then execute the logic above. Here is what I am attempting :

  


  #!/bin/sh
img=*.png
wav=*.wav

if [[ ${img%.*} == ${wav%.*} ]];
    then
        ffmpeg -loop 1 -i $img -i $wav -c:v libx264 -tune stillimage -c:a aac -b:a 192k -pix_fmt yuv420p -shortest $img.mp4;
    else
        echo "Failure"
    fi


  


  This begins by overwriting the image files, so it does not appear to work as planned. Is there a simpler way to do this ? Perhaps looping through images 1..5 in one folder and audio files 1..5 in another ?

  


  Thanks for any insights, and happy to provide more context (very new to this, so still learning).

  


• stream_loop generate a big size video [FFMPEG]

  26 mars 2021, par Mouaad Abdelghafour AITALI

  I'm trying to loop a short video for e.g. 190 time to match the audio length, I use the following code :

  


  -y -stream_loop  190  -i input.mp4 -c copy output.mp4


  


  The command above works, but it generates video with huge size for video with 3min the size is 885 MB

  


  2021-03-25 23:52:30.445 5687-6253/maa.abc.music_maker D/XXX: LOOPING VIDEO SIZE ===> 885.845MB


  


  Or there's any way I can loop the video to match the audio length without using -stream_loop

  


• Anomalie #3615 (Fermé) : Evitons les redirections

  8 décembre 2015, par Franck Dalot

  Bonjour
  spip 3.1 [22634]

  Il reste encore dans le core des url de type .org au lieu de .net
  Je croyais que cela avait été fait, mais il semble que non :-(
  Exemple :
  Faudrait faire une transformation des url du type :
  http://core.spip.org/
  en :
  https://core.spip.net/

  http://forum.spip.org/
  en :
  http://forum.spip.net/

  http://demo.spip.org/
  en :
  http://demo.spip.net/

  Pendant que j’y suis, il s’agit de sites de la galaxie ou pas ?
  http://math.spip.org/tex.php
  https://core.spip.net/projects/spip/repository/entry/spip/ecrire/inc_version.php#L234

  http://example.org/squelettes/bg.png
  http://zone.spip.org/trac/spip-zone/browser/_core_/plugins/compresseur/tests/css/expected_url_abs.css
  Car ils ne sont pas en .net

  Franck