Using ffmpeg to encode video to h264/hevc with constant or var=
iable bitrate
results in completely garbled output video on navi/radeon 5700 gpu.
ffmpeg command used:
ffmpeg -init_hw_device vaapi=3Dfoo:/dev/dri/renderD128 -hwaccel vaapi
-hwaccel_output_format vaapi -hwaccel_device foo \
-i <input file> -filter_hw_device foo -vf 'format=3Dnv12|vaapi,hwuplo=
ad' -c:v
hevc_vaapi -b:v 5000k -maxrate 5000k -f matroska <output file>
-This issue also applies to h264 encoding (replace "hevc_vaapi" w=
ith
"h264_vaapi" above).
HW used:
AMD Radeon 5700 XT
SW used:
linux-amd-staging-drm-next-git-5.4.858569.1c2677f991d3-1-x86_64
mesa-git 1:19.3.0_devel.116641.f11ea226664
libva-utils 2.5.0
ffmpeg 1:4.2.1
This issue sounds a bit like BUG 109538, however #109538 speaks=
of "garbled
line at the bottom" where I get completely garbled output, not just at=
the
bottom.
In additon, ffmpeg stalls/crashes sometimes as described in #109538 with:
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring vcn_enc0 timeout, signaled
seq=3D150025, emitted seq=3D150027
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process ffm=
peg
pid 228611 thread ffmpeg:cs0 pid 228612