I've got a bunch of old movies I'm reencoding and archiving. They're
mpeg2 in mkv. So I ran 2 pass vp9 and ffv1 :
6432740173 Apr 30 17:46 my-movie.mkv
718020678 May 8 19:30 my-movie.nut
1119231613 May 1 00:30 my-movie-vp9.mp4
I've never used ffv1 before. Is this expected ? Is it really this
effective as a lossless encoder ?
Or have I done something stupid ?
sean
vp9 cmd :
#!/bin/bash
Infile=my-movie
Options='-r 24000/1001 -c:v libvpx-vp9 -b:v 0 -crf 29 -row-mt 1 -threads
8 -tile-columns 6 -frame-parallel 1'
ffmpeg -i "$Infile".mkv $Options -pass 1 -speed 4 \
-g 9999 -aq-mode 0 -an -f webm /dev/null -y
ffmpeg -i "$Infile".mkv $Options -pass 2 -speed 1 \
-auto-alt-ref 1 -lag-in-frames 25 \
-g 9999 -aq-mode 0 -c:a copy "$Infile"-vp9.mp4
ffv1 cmd:
Infile="$1"
ffmpeg -i $Infile.mkv -c:v ffv1 -level 3 -threads 8 -coder -2 -context 1 \
-pass 1 -passlogfile ffv1_passlog \
-an -f nut /dev/null -y -loglevel info
ffmpeg -i $Infile.mkv -c:v ffv1 -level 3 -threads 8 -coder -2 -context 1 \
-pass 2 -passlogfile ffv1_passlog \
-map 0:1 -map 0:2 -c:a copy "$Infile".nut -loglevel info
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