I'd like to rip my DVDs and copy them to my hard disks for backup purposes. I'm currently doing this with a combination of mplayer and ffmpeg. Let me explain what I managed to accomplish so far.
First step, from DVD to VOB. $ mplayer -dvd-device /dev/sr0 -dumpstream -dumpfile Alien.vob dvd://1 Second step, from VOB to WebM/VP9/Opus: $ ffmpeg -i Alien.vob -map 0:0 -map 0:2 -map 0:3 -c:v libvpx-vp9 -c:a libopus -f webm -b:v 1000k -b:a 64k -ac 2 -metadata:s:a:0 language=ita -metadata:s:a:1 language=eng -metadata title=Alien Alien.webm Where: - 0:0 is the video track - 0:2 is the Italian AC-3 5.1 audio track - 0:3 is the English AC-3 5.1 audio track Original VOB file is 5165 MiB in size. Output WebM file is 475 MiB in size. Less than 10 % of that. Is this configuration good enough or there's room for improvements? Even if I specified 1000k as the video bitrate the resulting webm file has an overall bitrate of 593k. How can that be possible? Which bitrate should I use for DVD-quality material? Should I use two-pass encoding instead for better quality? Would that take much longer? I'm downmixing audio tracks to stereo because I don't have 5.1 speakers and don't plan to buy them anytime soon. Is 64k enough for a stereo Opus audio track? Thanks. _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
