<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - Broken hardware video encoding with vaapi/ffmpeg" href="https://bugs.freedesktop.org/show_bug.cgi?id=104920#c6">Comment # 6</a> on <a class="bz_bug_link bz_status_RESOLVED bz_closed" title="RESOLVED NOTABUG - Broken hardware video encoding with vaapi/ffmpeg" href="https://bugs.freedesktop.org/show_bug.cgi?id=104920">bug 104920</a> from <a class="email" href="mailto:adf.lists@gmail.com" title="Andy Furniss <adf.lists@gmail.com>"> Andy Furniss</a> <pre>(In reply to Luke McKee from <a href="show_bug.cgi?id=104920#c3">comment #3</a>) > 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)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>