> -----Original Message----- > From: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> On Behalf Of Fu, > Linjie > Sent: Saturday, February 15, 2020 16:31 > To: Zhong Li <lizhong1...@gmail.com>; FFmpeg development discussions > and patches <ffmpeg-devel@ffmpeg.org> > Subject: Re: [FFmpeg-devel] [PATCH] lavc/qsvenc: add support for external > bitrate control for HEVC > > > -----Original Message----- > > From: Zhong Li <lizhong1...@gmail.com> > > Sent: Saturday, February 15, 2020 14:08 > > To: FFmpeg development discussions and patches <ffmpeg- > > de...@ffmpeg.org> > > Cc: Fu, Linjie <linjie...@intel.com> > > Subject: Re: [FFmpeg-devel] [PATCH] lavc/qsvenc: add support for external > > bitrate control for HEVC > > > > Linjie Fu <linjie...@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...@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. >
To elaborate more, some inputs from Media SDK: Explicit list of codecs for which extbrc is supported: AVC, HEVC Explicit comment on which HW it is supported: there are no HW limitations. Note that SWBRC is available since 1.24 API: (https://github.com/Intel-Media-SDK/MediaSDK/blob/master/doc/mediasdk-man.md#mfxBRCFrameCtrl) EXTBRC for HEVC should be supported ever since HEVC encoder is reday. (gen 9 +) Explicit comment whether features is enabled for VME and VDENC encoders: there is no limitations. > > > ... > > > > Patch LGTM > > Thanks for the review. > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
