[FFmpeg-trac] #5732(avcodec:open): Display corruption on very high-bitrate H.264 files
FFmpeg
trac at avcodec.org
Sun Jul 24 22:18:22 EEST 2016
#5732: Display corruption on very high-bitrate H.264 files
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Reporter: Sesse | Owner:
Type: defect | Status: open
Priority: minor | Component: avcodec
Version: git-master | Resolution:
Keywords: h264 | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Comment (by Sesse):
Yes indeed, this reproduces it on my laptop (also Haswell):
{{{
ffmpeg -hwaccel vaapi -ss 12:00 -vaapi_device :0 -i through-the-cracks.mp4
-vf 'format=nv12,hwupload' -c:v h264_vaapi test.mp4
}}}
It creates a stream (default quantizer 20, I believe) that works perfectly
if I view it in VLC with vaapi on, but if I set LIBVA_DRIVER_NAME=none
(effectively sabotaging vaapi, as it looks for a “none” driver), it gets
completely broken.
This is with va-i965-driver 0.7.1.
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Ticket URL: <https://trac.ffmpeg.org/ticket/5732#comment:16>
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