Filter "sharpen" on Vaapi encoding

[jEsuSdA]

Summary of the bug:

I want to apply a sharpen (or unsharp) filter to a video encoding using vaapi, but I tried a lot of parameters without any success.

How to reproduce:

This is my ffmpeg command to convert a video to x264 with vaapi

ffmpeg -vaapi_device /dev/dri/renderD128 -hwaccel vaapi -hwaccel_output_format vaapi -i test.mp4 -acodec libmp3lame -ar 44100 -ab 128k -ac 2 -vf 'format=nv12|vaapi,hwupload,scale_vaapi=w=640:h=360'  -threads 0  -r 30 -c:v h264_vaapi -profile:v high -level:v 3 -qp 15   -y test.mkv

It works fine, but with these other lines I can convert a video to x264 with a much better quality (thanks, in part, to a sharpen filter):

ffmpeg -i "test.mp4" -an -pass 1 -vcodec libx264 -r 30 -preset slow -s 640x360 -b:v 750k -bt:v 850k -vf unsharp=5:5:1.0:5:5:1.0 -threads 0 "test.mkv"

ffmpeg -i "test.mp4" -acodec libmp3lame -ar 44100 -ab 128k -ac 2 -pass 2 -vcodec libx264 -r 30 -preset slow -s 640x360 -b:v "750k -bt:v 850k -vf unsharp=5:5:1.0:5:5:1.0 -threads 0  -y "test.mkv"

The difference between the 2 ways (GPU vs CPU) is really huge. The second way generates much better visual quality videos than the first one.

It is possible to do 2pass conversion with vaapi?
It is possible to apply a sharpen filter with vaappi?

Thanks a lot.

[Carl Eugen Hoyos]

Could you point me to the part of the vaapi documentation where a sharpen filter is mentioned?

[haihao]

Sorry for slow response. You should use 'sharpness_vaapi' filter in your command line,
and you may check the options by running ffmpeg -h filter=sharpness_vaapi

BTW could you try the iHD driver (​https://github.com/intel/media-driver) if possible.