[FFmpeg-user] libvpx usage

Reindl Harald h.reindl at thelounge.net
Sun Jan 6 01:45:29 CET 2013

Am 06.01.2013 00:30, schrieb Liam Condron-Farnos:
> I've been struggling with this on and off for a few days now: what is the
> correct way to encode VP8 video? My reading of ffmpeg -h encoder=libvpx
> would lead me to think that
>     ffmpeg -i input.mp4 -c:a libvorbis -q:a 5 -q:v libvpx -crf 1 output.webm
> should give me a working, ridiculously-high-quality video. However, it just
> spits up errors:

this is the logged command of my ffmpeg-autotest and i can see
no difference compared to x264 in size or quality, the -vf param
is automatically calculated from the input by my php-library

ffmpeg -i '/Volumes/dune/buildserver/autotest/parts/ffmpeg/demo.mp4' -y -vb '448k' -ab '96k' -bt '64k' -maxrate
'544k' -ar '44100' -ac '2' -r '25' -vf 'scale=480:266,setdar=16:9,pad=480:270:0:2:000000' -async '1' -acodec
'libvorbis' -vcodec 'libvpx' -threads '4' '/Volumes/dune/buildserver/autotest/parts/ffmpeg/targets/test_2p.webm'

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