[Bug]: No multi reference frames(>2) supported on DG2
feiwan1 opened this issue · 2 comments
feiwan1 commented
Which component impacted?
Encode
Is it regression? Good in old configuration?
None
What happened?
- Linux OS
- use gmmlib/media-driver/onevpl gitbub master commit.
- Run ffmpeg-qsv cmd with multi reference frames(>2)(set with option
-refs 3
), but the output frames in bitstream only use 2 reference frame at most.
3.1 AVC encode:
ffmpeg -v verbose -hwaccel qsv -hwaccel_output_format qsv -f lavfi -i testsrc=size=1280x720 -vf 'format=nv12,hwupload=extra_hw_frames=120' -c:v h264_qsv -refs 3 -rc_mode cqp -q 10 -b_strategy 0 -vframes 100 -y qsv.mp4
3.2 HEVC encode:
ffmpeg -v verbose -hwaccel qsv -hwaccel_output_format qsv -f lavfi -i testsrc=size=1280x720 -vf 'format=nv12,hwupload=extra_hw_frames=120' -c:v hevc_qsv -refs 3 -rc_mode cqp -q 10 -b_strategy 0 -vframes 100 -y qsv.mp4
3.3 AV1 encode:
ffmpeg -v verbose -hwaccel qsv -hwaccel_output_format qsv -f lavfi -i testsrc=size=1280x720 -vf 'format=nv12,hwupload=extra_hw_frames=120' -c:v av1_qsv -refs 3 -rc_mode cqp -q 10 -b_strategy 0 -vframes 100 -y qsv.mp4 - While
vainfo -a
shows that AVC/HEVC/AV1 can support more than 2 reference frames. And same cmd on TGL looks good.
What's the usage scenario when you are seeing the problem?
Transcode for media delivery
What impacted?
No response
Debug Information
No response
Do you want to contribute a patch to fix the issue?
None
intel-mediadev commented
Auto Created VSMGWL-73777 for further analysis.
feiwan1 commented
More info, the issue is exist for Low Power mode on TGL too. By adding -low_power 1
in cmdline.