From patchwork Fri Dec 1 20:04:11 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: lavc/qsvenc: set HRD buffer size X-Patchwork-Submitter: "Li, Zhong" X-Patchwork-Id: 64071 Message-Id: <1512158651-25007-1-git-send-email-zhong.li@intel.com> To: libav-devel@libav.org Date: Fri, 1 Dec 2017 15:04:11 -0500 From: Zhong Li List-Id: libav development 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 --- 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)