Hello! I'm running libva 1.5.1 and libva-intel-driver 1.5.1 on Sandy Bridge. If I encode any video with low (< 8 Mbit/s) bitrate I get very distorted video output with horizontal stripes in it. This is a case for both cqp and cbr encoding. I've tried to encode it with gstreamer 1.0, avcenc and h264encode with same output result.
This is what I get with 3000 Kbit/s CBR encoding: http://ovrload.ru/f/55938_bake-cbr-3000.mkv It was encoded with the following gstreamer pipeline: gst-launch-1.0 -e filesrc location=bake_op.mkv ! matroskademux ! vaapidecode ! videoconvert ! video/x-raw,format=NV12 ! vaapiencode_h264 rate-control=cbr bitrate=3000 ! video/x-h264,stream-format=byte-stream ! h264parse ! matroskamux ! progressreport ! filesink location=bake-cbr-3000.mkv Windows encoders like MediaCoder and handbrake produce decent video quality without horizontal stripes. Nothing different with current git master of libva and libva-intel-driver. _______________________________________________ Libva mailing list Libva@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libva
