[FFmpeg-devel] [PATCH v1] fftools/ffmpeg_dec: Don't keep sending frame to filters in flushing

[Xiang, Haihao]

On So, 2023-06-25 at 06:20 +0000, Xiang, Haihao wrote:
> On Ma, 2023-06-12 at 11:33 +0800, Fei Wang wrote:
> > Filter may has a limited frame pool size. Do not always send frame to
> > filters without reaping.
> > 
> > Fix the regression of commit 5fa00b38e6.
> > 
> > Example cmd:
> > $ ffmpeg -threads 20 -init_hw_device vaapi=hw:/dev/dri/renderD128   \
> > -hwaccel_output_format vaapi -hwaccel vaapi -i avc_1080P.mp4        \
> > -vf 'scale_vaapi=w=720:h=480' -f null -
> > 
> > Signed-off-by: Fei Wang <fei.w.wang at intel.com>
> > ---
> >  fftools/ffmpeg_dec.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/fftools/ffmpeg_dec.c b/fftools/ffmpeg_dec.c
> > index 799be63215..d6b34402f8 100644
> > --- a/fftools/ffmpeg_dec.c
> > +++ b/fftools/ffmpeg_dec.c
> > @@ -531,6 +531,12 @@ int dec_packet(InputStream *ist, const AVPacket *pkt,
> > int
> > no_eof)
> >          av_frame_unref(frame);
> >          if (ret < 0)
> >              exit_program(1);
> > +
> > +        // During flushing, break out to reap filter once send a frame to
> > filters to
> > +        // avoid drain out filter's output frame pool. Especially for HW
> > filters which
> > +        // always have a limited frame pool size.
> > +        if (!pkt)
> > +            return 0;
> 
> Looks good and it works well for me. I'm going to push it if no objection
> 

There is a conflict when applying your patch to the latest FFmpeg, could you
rebase the patch ? 

Thanks
Haihao