Re: [FFmpeg-devel] [PATCH v4 1/2] lavc/vaapi_encode: add support for maxframesize

["Wang, Fei W" <fei.w.wang-at-intel.com@ffmpeg.org>]

> -----Original Message-----
> From: Wang, Fei W <fei.w.wang@intel.com>
> Sent: Tuesday, March 22, 2022 10:11 PM
> To: ffmpeg-devel@ffmpeg.org
> Cc: Linjie Fu <linjie.fu@intel.com>; Wang, Fei W <fei.w.wang@intel.com>
> Subject: [PATCH v4 1/2] lavc/vaapi_encode: add support for maxframesize
> 
> From: Linjie Fu <linjie.fu@intel.com>
> 
> Add support for max frame size:
>     - max_frame_size (bytes) to indicate the max allowed size for frame.
> 
> If the frame size exceeds the limitation, encoder will to control the frame size by
> adjusting QP value.
>     - MFS_NUM_PASSES to indicate number of passes for QP adjust.
>     - MFS_DELTA_QP to indicate adjust qp value per pass.
> 
> To simplify the usage, default QP adjust is set to delta_qp[4] = {1, 1, 1, 1}.
> Use new_qp for encoder if frame size exceeds the limitation:
>     new_qp = base_qp + delta_qp[0] + delta_qp[1] + ...
> 
> ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/renderD128 -f rawvideo \
>         -v verbose -s:v 352x288 -i ./input.yuv -vf format=nv12,hwupload \
>         -c:v h264_vaapi -profile:v main -g 30 -bf 3 -max_frame_size 40000 \
>         -vframes 100 -y ./max_frame_size.h264
> 
> Max frame size was enabled since VA-API version (1, 3, 0), but query is available
> since (1, 5, 0). It will be passed as a parameter in picParam and should be set for
> each frame.
> 
> Signed-off-by: Linjie Fu <linjie.fu@intel.com>
> Signed-off-by: Fei Wang <fei.w.wang@intel.com>
> ---
> 1. re-send the 2 legacy patch:
> https://patchwork.ffmpeg.org/project/ffmpeg/patch/20190715105936.4860-1-
> linjie.fu@intel.com/
> https://patchwork.ffmpeg.org/project/ffmpeg/patch/20190715110000.5069-1-
> linjie.fu@intel.com/
> 
>  libavcodec/vaapi_encode.c | 67
> +++++++++++++++++++++++++++++++++++++++
>  libavcodec/vaapi_encode.h | 19 +++++++++--
>  2 files changed, 84 insertions(+), 2 deletions(-)

Hi Andriy,

Is there any way to know the details of failure for this patch? Like OS, configuration,
gcc version, etc. It looks good on my local Ubuntu with gcc 9.3, but show fails in patchwork checks:
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20220322141119.595627-1-fei.w.wang@intel.com/

Fei
Thanks
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