trying to see if it needs tweaking still but might have educational or comical value.
#!/bin/bash
#movie reverse player
#https://unix.stackexchange.com/questions/214327/how-can-i-reverse-a-video-clipffmpeg -i input.mkv -an -qscale 1 %06d.jpg
ffmpeg -i input.mkv -vn -ac 2 audio.wav
sox -V audio.wav backwards.wav reverse
cat $(ls -t *jpg) | ffmpeg -f image2pipe -vcodec mjpeg -r 25 -i – -i backwards.wav -vcodec libx264 -vpre slow -crf 20 -threads 0 -acodec flac output.mkv
mencoder input.dv -of rawvideo -ofps 50 -ovc raw -vf yadif=3,format=i420 -nosound -really-quiet -o – | ffmpeg -vsync 0 -f rawvideo -s 720×576 -r 50 -pix_fmt yuv420p -i – -vcodec libx264 -vpre slow -crf 20 -threads 0 video.mkv
#kdenlive reverse clip https://userbase.kde.org/Kdenlive/Manual/Project_Menu/Reverse_Clip
#right-click on the clip: clip jobs / reverse clip
#openshoot negative speed
