Comment # 6
on bug 104920
from Andy Furniss
(In reply to Luke McKee from comment #3) > ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 > -hwaccel_output_format vaapi -ss 120 -t 120 -i a-movie.mkv -map 0:0 -map 0:1 > -c:v h264_vaapi -b:v 4000k -qp 20 -bf 0 -profile:v 578 (or > constrained_baseline in ffmpeg-git) -movflags +faststart -quality:v 0 > -level:v 3.1 -coder:v cavlc -c:a aac -ab 128k -ar 48000 -ac 2 vaapitest.mp4 Not related to any issue as such - and I don't have the same h/w to test, but some thoughts related to the command line. -b:v 4000k -qp 20 I would think one or the other, not both ie. you want constant bitrate or you want constant qp (= highly variable bitrate). I didn't test what ffmpeg takes this to mean. -coder:v cavlc I don't think this is hooked up - you will probably get cabac or calvlc depending on h/w. -quality:v 0 I don't thing this will do anything either on VCE (I don't know anything about the newer engines)
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