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" },
--
2.34.1
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