Transcoding old screen recordings to AV1

ffmpeg -help encoder=libsvtav1

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ffmpeg -i 'my_captures/detfinnsenminneslucka.ogg' -vf "setsar=sar=1/1,setdar=dar=4/3,pad=1280:1024:(ow-iw)/2" -r 30 -c:v ffv1 'detfinnsenminneslucka.mkv'
ffmpeg -i 'my_captures/långsamma_idg.ogg' -vf "setsar=sar=1/1,setdar=dar=4/3,pad=1280:1024:(ow-iw)/2" -r 30 -c:v ffv1 'långsamma_idg.mkv'


for fn in *.mkv *.ogg; do ffmpeg -i "$fn" -vf "setsar=sar=1/1,scale=-1:1440,pad=2560:1440:(ow-iw)/2,setdar=dar=16/9" -r 30 -c:v ffv1 "ffv1/${fn%.*}.mkv"; done

for fn in *.mkv; do ffmpeg -i "$fn" -r 30 -c:v libsvtav1 -svtav1-params "EncoderBitDepth=10" -crf 1 "av1/${fn%.*}.mkv"; done

ffmpeg -f concat -safe 0 -i concat.txt -r 30 -c:v libsvtav1 -svtav1-params "EncoderBitDepth=10" -crf 1 merged123.mkv