#!/bin/bash
videobitrate=499
audiobitrate=128
#speed 0-5 0="slowest best quality" 5="fastest worst uality"
speed=5
#deadline "realtime"=fastest/worst_qualiy "good" "best"=slowest/best_quality
deadline=best
titlemod=[v${videobitrate}_a${audiobitrate}]
for file in *.mkv
do
filename="${file%%.*}"
ffmpeg -y -i "$file" -map 0:s:0 subtitles.ass
ffmpeg -y -i "$file" -vf subtitles=subtitles.ass -map 0:v:0 -map 0:a:0 -c:v libvpx-vp9 -b:v ${videobitrate}k -c:a libopus -b:a ${audiobitrate}k -speed ${speed} -deadline ${deadline} -metadata:s:v:0 title="${filename}_${titlemod}" -metadata title="${filename}_${titlemod}" -pix_fmt yuv420p -pass 1 -f webm /dev/null && \
ffmpeg -y -i "$file" -vf subtitles=subtitles.ass -map 0:v:0 -map 0:a:0 -c:v libvpx-vp9 -b:v ${videobitrate}k -c:a libopus -b:a ${audiobitrate}k -speed ${speed} -deadline ${deadline} -metadata:s:v:0 title="${filename}_${titlemod}" -metadata title="${filename}_${titlemod}" -pix_fmt yuv420p -pass 2 "${filename}_${titlemod}.webm"
done