Hello,
I noticed a performance drop encoding a mpeg file to a h264 video using
the vaapi option deinterlace_vaapi on a Haswell i5-4570 with Linux
5.19-rc1.
A 10 minute long video takes normally 41s to convert, now with 5.19-rc1
it takes about 2m 36s.
My ffmpeg line is:
ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128
-hwaccel_output_format vaapi -i test.vdr -vf 'deinterlace_vaapi' -c:v
h264_vaapi
Removing the option deinterlace_vaapi shows no difference in performance
between 5.18 and 5.19-rcX.
I bisected this down to:
commit 047a1b877ed48098bed71fcfb1d4891e1b54441d
Author: Christian König <christian.koenig@xxxxxxx>
Date: Tue Nov 23 09:33:07 2021 +0100
dma-buf & drm/amdgpu: remove dma_resv workaround
and wasn't able to revert this one on top of 5.19-rcX.
I tried the predecessor commit:
commit 73511edf8b196e6f1ccda0fdf294ff57aa2dc9db (HEAD)
Author: Christian König <christian.koenig@xxxxxxx>
Date: Tue Nov 9 11:08:18 2021 +0100
dma-buf: specify usage while adding fences to dma_resv obj v7
which is fine.
Using ffmpeg 5.0.1 with libva 2.10.0 and intel vaapi driver 2.4.1
Best regards,
Thomas
