On Ma, 2022-12-26 at 14:02 +0800, wenbin.chen-at-intel....@ffmpeg.org wrote:
> From: Wenbin Chen <wenbin.c...@intel.com>
>
> Signed-off-by: Wenbin Chen <wenbin.c...@intel.com>
> ---
> doc/encoders.texi | 5 +++++
> libavcodec/qsvenc.c | 4 ++++
> libavcodec/qsvenc_av1.c | 1 +
> 3 files changed, 10 insertions(+)
>
> diff --git a/doc/encoders.texi b/doc/encoders.texi
> index b8051cda3f..543b5e26a9 100644
> --- a/doc/encoders.texi
> +++ b/doc/encoders.texi
> @@ -3850,6 +3850,11 @@ Extended bitrate control.
>
> @item @var{look_ahead_depth}
> Depth of look ahead in number frames, available when extbrc option is
> enabled.
> +
> +@item @var{low_delay_brc}
> +Setting this flag turns on or off LowDelayBRC feautre in qsv plugin, which
> provides
> +more accurate bitrate control to minimize the variance of bitstream size
> frame
> +by frame. Value: -1-default 0-off 1-on
> @end table
>
> @section snow
> diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
> index 514a1e8148..f5c6a164bb 100644
> --- a/libavcodec/qsvenc.c
> +++ b/libavcodec/qsvenc.c
> @@ -537,6 +537,7 @@ static void dump_video_av1_param(AVCodecContext *avctx,
> QSVEncContext *q,
>
> av_log(avctx, AV_LOG_VERBOSE, "WriteIVFHeaders: %s \n",
> print_threestate(av1_bs_param->WriteIVFHeaders));
> + av_log(avctx, AV_LOG_VERBOSE, "LowDelayBRC: %s\n", print_threestate(co3-
> >LowDelayBRC));
> }
> #endif
>
> @@ -1090,6 +1091,9 @@ static int init_video_param(AVCodecContext *avctx,
> QSVEncContext *q)
> q->extco3.MaxFrameSizeP = q->max_frame_size_p;
>
> q->extco3.ScenarioInfo = q->scenario;
> + } else if (avctx->codec_id == AV_CODEC_ID_AV1) {
> + if (q->low_delay_brc >= 0)
> + q->extco3.LowDelayBRC = q->low_delay_brc ?
> MFX_CODINGOPTION_ON : MFX_CODINGOPTION_OFF;
> }
>
> if (avctx->codec_id == AV_CODEC_ID_HEVC) {
> diff --git a/libavcodec/qsvenc_av1.c b/libavcodec/qsvenc_av1.c
> index bb9ad16927..1e7801fefe 100644
> --- a/libavcodec/qsvenc_av1.c
> +++ b/libavcodec/qsvenc_av1.c
> @@ -110,6 +110,7 @@ static const AVOption options[] = {
> QSV_OPTION_ADAPTIVE_I
> QSV_OPTION_ADAPTIVE_B
> QSV_OPTION_EXTBRC
> + QSV_OPTION_LOW_DELAY_BRC
> { "profile", NULL, OFFSET(qsv.profile), AV_OPT_TYPE_INT, { .i64 =
> MFX_PROFILE_UNKNOWN }, 0, INT_MAX, VE, "profile" },
> { "unknown" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 =
> MFX_PROFILE_UNKNOWN }, INT_MIN, INT_MAX, VE, "profile" },
> { "main" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 =
> MFX_PROFILE_AV1_MAIN }, INT_MIN, INT_MAX, VE, "profile" },
Patchset LGTM, will apply,
-Haihao
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