[FFmpeg-devel] libavcodec:questions about function ff_mpeg_ref_picture, crushed when using dxva2 hwaccel.

[Wei Gao]

2013/3/22 Hendrik Leppkes <h.leppkes at gmail.com>

> On Fri, Mar 22, 2013 at 8:19 AM, Wei Gao <highgod0401 at gmail.com> wrote:
> > Hi,
> >
> > I am merging my dxva2 patch to the latest ffmpeg, and I found that the
> h264
> > of dxva2 wroks well and others don't (vc1 wmv3 mpeg2), I trace the code
> and
> > found that the function ff_mpeg_ref_picture crushed, happened code is as
> > follows:
> >
> > if (src->hwaccel_picture_private) {
> >         av_log(NULL,AV_LOG_ERROR,"src->hwaccel_picture_private\n");
> >         dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
> >         if (!dst->hwaccel_priv_buf)
> >             goto fail;
> >         dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
> >     }
> >
> > h264 doesn't run in the branch but others do. I comment out these code
> and
> > other video format run correct.
> > I tried two configuerations:
> > ./configure --disable-debug --enable-gpl --enable-avfilter
> --enable-libx264
> > --cpu=i686 --enable-opencl --enable-dxva2 --enable-hwaccels
> > ./configure --disable-debug --enable-gpl --enable-avfilter
> --enable-libx264
> > --enable-pthreads --enable-opencl --enable-dxva2 --enable-hwaccels
> >
> > they are the same problem.
> >
> > I don't know why other video format run in the branch and what these code
> > do?
>
> h264 does not use this because ff_mpeg_ref_picture is part of
> mpegvideo, and is not used by h264 anymore.
>
> For the record, hwaccel works fine for me, in all codecs.
> There have been some issues with it, but i submitted patches to fix
> the issues and all of them are in git master now.
>
Hi,
Thanks, do you set any options to your hwaccel environment? because my code
died when run into that branch. but after I comment of it, the result is
correct too. So what the branch implement?

Thanks
Best regards

> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>