On 01/12/17 20:04, Zhong Li wrote: > Hypothetical Reference Decoding (HRD) model assumes that data flows into a > buffer of the fixed size BufferSizeInKB with a constant bitrate. > BufferSizeInKB represents the maximum possible size of any compressed frames. > > Signed-off-by: Zhong Li <zhong...@intel.com> > --- > libavcodec/qsvenc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c > index 9db9eb3..cdddfd9 100644 > --- a/libavcodec/qsvenc.c > +++ b/libavcodec/qsvenc.c > @@ -437,7 +437,7 @@ static int init_video_param(AVCodecContext *avctx, > QSVEncContext *q) > q->param.mfx.NumSlice = avctx->slices; > q->param.mfx.NumRefFrame = FFMAX(0, avctx->refs); > q->param.mfx.EncodedOrder = 0; > - q->param.mfx.BufferSizeInKB = 0; > + q->param.mfx.BufferSizeInKB = (avctx->rc_buffer_size > 0) ? > avctx->rc_buffer_size / 8000 : 0; > > desc = av_pix_fmt_desc_get(sw_format); > if (!desc) >
The Intel documentation says "BufferSizeInKB represents the maximum possible size of any compressed frames.". Is that just confused? Some of the surrounding text does suggest that it's the right thing. Probably fine, but are you sure it should be set when in non-bitrate-targetted modes? (The related HRD parameter InitialDelayInKB is set further down in CBR/VBR modes only.) - Mark Aside: Please try to avoid sending messages from the future, it's confusing when things are sorted by time. (You probably have the clock set wrong on a machine used for git send-email.) _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel
