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| author | Li, Zhong <zhong.li@intel.com> | 2017-12-01 16:48:45 +0800 |
|---|---|---|
| committer | Maxym Dmytrychenko <maxim.d33@gmail.com> | 2017-12-12 13:58:18 +0100 |
| commit | 6ff29343b01923e9b125fe7404ac8701cdfb1fe5 (patch) | |
| tree | 11ceb583e8e1bdfe1bc32af8ff6cc424bc84e68d | |
| parent | 18a0f420269ff4c730422361c5c4d8eea096e900 (diff) | |
| download | ffmpeg-6ff29343b01923e9b125fe7404ac8701cdfb1fe5.tar.gz | |
lavc/qsvenc: set HRD buffer size
Hypothetical Reference Decoding (HRD) model assumes that data flows
into a buffer of the fixed size BufferSizeInKB with a constant bitrate.
Smaller BufferSizeInKB means smaller frame size variations,
but more difficult to maintain HRD.
Signed-off-by: Zhong Li <zhong.li@intel.com>
Signed-off-by: Maxym Dmytrychenko <maxim.d33@gmail.com>
| -rw-r--r-- | libavcodec/qsvenc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c index 9db9eb375c..f6034c443d 100644 --- a/libavcodec/qsvenc.c +++ b/libavcodec/qsvenc.c @@ -503,6 +503,7 @@ static int init_video_param(AVCodecContext *avctx, QSVEncContext *q) #if QSV_HAVE_VCM case MFX_RATECONTROL_VCM: #endif + q->param.mfx.BufferSizeInKB = avctx->rc_buffer_size / 8000; q->param.mfx.InitialDelayInKB = avctx->rc_initial_buffer_occupancy / 1000; q->param.mfx.TargetKbps = avctx->bit_rate / 1000; q->param.mfx.MaxKbps = avctx->rc_max_rate / 1000; |