VidMod 4 shell

vidmod.sh

#!/bin/sh
# VidMod 4 shell by Plasmoxy
# - clip editor for ffmpeg for shell but can also like extract subtitile and cool stuff

fname=$2

case $1 in

    # cut with reencoding
    # vidmod cut source.mp4 0:00 0:04
    cut)
        from=$3
        to=$4
        ffmpeg -i "$fname" -ss "$from" -to "$to" -async 1 "$fname.cut.mp4"
    ;;
    
    # cut without reencoding (can miss keyframes)
    # vidmod cut source.mp4 0:00 0:04
    cutc)
        from=$3
        to=$4
        ffmpeg -i "$fname" -ss "$from" -to "$to" -async 1 "$fname.cut.mp4"
    ;;
    
    # downscale by half
    # vidmod desize source.mp4
    desize)
        ffmpeg -i "$fname" -vf "scale=iw/2:ih/2" "$fname.desize.mp4"
    ;;
    
    # reduce bitrate to specified number (units 2M=2 Mbps, 64k = 64kbps)
    # vidmod bitrate source.mp4 2M
    bitrate)
        ffmpeg -i "$fname" -b:v $3 "$fname.bitrate.mp4"
    ;;
    
    # extract specified subtitle track as srt
    # vidmod srt source.mp4 0
    srt)
        ffmpeg -i "$fname" -map 0:s:$3 "$fname.$3.srt"
    ;;
    
    *)
        echo "No such command, use cut/cutc/desize/bitrate as parameter."
    ;;
esac