[FFmpeg-devel] [PATCH] lavc/qsvenc: add support for external bitrate control for HEVC

[Fu, Linjie]

> -----Original Message-----
> From: Zhong Li <lizhong1008 at gmail.com>
> Sent: Saturday, February 15, 2020 14:08
> To: FFmpeg development discussions and patches <ffmpeg-
> devel at ffmpeg.org>
> Cc: Fu, Linjie <linjie.fu at intel.com>
> Subject: Re: [FFmpeg-devel] [PATCH] lavc/qsvenc: add support for external
> bitrate control for HEVC
> 
> Linjie Fu <linjie.fu at intel.com> 于2020年2月13日周四 下午8:50写道：
> >
> > Enables option for hevc_qsv encoder:
> >     -extbrc
> >
> > Improvements in BD-Rate could be observed with extbrc on.
> >
> > Signed-off-by: Linjie Fu <linjie.fu at intel.com>
> > ---
> > Details for extbrc:
> > https://github.com/Intel-Media-
> SDK/MediaSDK/blob/master/doc/mediasdk-man.md#external-bit-rate-
> control
> >
> > The improvement differs depending on the platform/clips/bitrate.
> > Based on the verifying on ICL, ~20% improvement in BD-Rate could be
> observed.
> 
> Is there any HW platform requirement for this feature? And how much
> quality improvement  for H264?

Should also work on KBL or latest platforms, however didn't test the detailed
quality improvement data yet on other platforms or H264.

>
...
> 
> Patch LGTM

Thanks for the review.