On Fri, Nov 1, 2019 at 11:20 AM Zhong Li <lizhong1...@gmail.com> wrote:
> > A large initial_pool_size leads to redundant GPU memory allocations
> > compared with MSDK.
> >
> > For some special cases which needs larger GPU memory like look_ahead,
> > add -extra_hw_frames to allocate more.
> >
> > CMD:
> > ffmpeg -hwaccel qsv -extra_hw_frames 50 -c:v hevc_qsv -i hevc.h265 -c:v
> h264_qsv
> > -look_ahead 1 -look_ahead_depth 50 -y output.h264
> >
> > Fix #7943.
> >
> > Reported-by: Eero T
> > Signed-off-by: Linjie Fu <linjie...@intel.com>
> > ---
> > fftools/ffmpeg_qsv.c | 2 +-
> > libavcodec/qsvdec.c | 5 ++++-
> > libavcodec/qsvenc_h264.c | 4 ++--
> > 3 files changed, 7 insertions(+), 4 deletions(-)
> >
> > diff --git a/fftools/ffmpeg_qsv.c b/fftools/ffmpeg_qsv.c
> > index 9c4285b..5039a5a 100644
> > --- a/fftools/ffmpeg_qsv.c
> > +++ b/fftools/ffmpeg_qsv.c
> > @@ -93,7 +93,7 @@ int qsv_init(AVCodecContext *s)
> > frames_ctx->height = FFALIGN(s->coded_height, 32);
> > frames_ctx->format = AV_PIX_FMT_QSV;
> > frames_ctx->sw_format = s->sw_pix_fmt;
> > - frames_ctx->initial_pool_size = 64 + s->extra_hw_frames;
> > + frames_ctx->initial_pool_size = 24 + s->extra_hw_frames;
>
> Should be better add pool size when look_ahead is enabled.
>
>
yes, please follow this.
> E:g
> initial_pool_size = 24 + look_head_depth + s->extra_hw_frames;
>
> you can set a default look_ahead_depth when look_ahead is enabled bu
> no depth specified.
>
> > frames_hwctx->frame_type =
> MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
> >
> > ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
> > diff --git a/libavcodec/qsvdec.c b/libavcodec/qsvdec.c
> > index 0d34021..407e6de 100644
> > --- a/libavcodec/qsvdec.c
> > +++ b/libavcodec/qsvdec.c
> > @@ -300,8 +300,11 @@ static int alloc_frame(AVCodecContext *avctx,
> QSVContext *q, QSVFrame *frame)
> > else
> > ret = ff_get_buffer(avctx, frame->frame,
> AV_GET_BUFFER_FLAG_REF);
> >
> > - if (ret < 0)
> > + if (ret < 0) {
> > + av_log(avctx, AV_LOG_ERROR, "More memory in need, "
> > + "try -extra_hw_frames to allocate more.\n");
> > return ret;
> > + }
> >
> > if (frame->frame->format == AV_PIX_FMT_QSV) {
> > frame->surface = *(mfxFrameSurface1*)frame->frame->data[3];
> > diff --git a/libavcodec/qsvenc_h264.c b/libavcodec/qsvenc_h264.c
> > index 27f36b9..4e8035b 100644
> > --- a/libavcodec/qsvenc_h264.c
> > +++ b/libavcodec/qsvenc_h264.c
> > @@ -112,8 +112,8 @@ static const AVOption options[] = {
> > { "max_dec_frame_buffering", "Maximum number of frames buffered in
> the DPB", OFFSET(qsv.max_dec_frame_buffering), AV_OPT_TYPE_INT, { .i64 = 0
> }, 0, UINT16_MAX, VE },
> >
> > #if QSV_HAVE_LA
> > - { "look_ahead", "Use VBR algorithm with look ahead",
> OFFSET(qsv.look_ahead), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
> > - { "look_ahead_depth", "Depth of look ahead in number frames",
> OFFSET(qsv.look_ahead_depth), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 100, VE },
> > + { "look_ahead", "Use VBR algorithm with look ahead,
> extra_hw_frames is needed", OFFSET(qsv.look_ahead),
> AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
> > + { "look_ahead_depth", "Depth of look ahead in number frames,
> extra_hw_frames is needed", OFFSET(qsv.look_ahead_depth), AV_OPT_TYPE_INT,
> { .i64 = 0 }, 0, 100, VE },
>
> No need to update the message if follow comments above.
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