Re: [FFmpeg-devel] [PATCH v1] avcodec/libaomdec: don't set aspect ratio when it's not yet known

[Steven Liu <lingjiujianke@gmail.com>]

James Almer <jamrial@gmail.com>于2023年10月8日 周日20:08写道：

> On 10/8/2023 8:57 AM, Steven Liu wrote:
> > Makes the output of the libaom av1 decoder consistent with external
> decoders like
> > libdav1d.
> >
> > reference commit: 1652f2492f88434010053289d946dab6a57e4d58
>
> But it is known at this point. picture->sample_aspect_ratio is set
> directly above.
>
> What needs to be done is initializing the decoder in aom_init() using
> the extradata, so lavf will not attempt to decode frames in order to get
> stream info, which is what i assume is happening here and why you want
> SAR to be 0/1.

i want fate pass

>
>
> >
> > Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
> > ---
> >   libavcodec/libaomdec.c | 1 -
> >   1 file changed, 1 deletion(-)
> >
> > diff --git a/libavcodec/libaomdec.c b/libavcodec/libaomdec.c
> > index 695d901051..ff4137bfc6 100644
> > --- a/libavcodec/libaomdec.c
> > +++ b/libavcodec/libaomdec.c
> > @@ -204,7 +204,6 @@ static int aom_decode(AVCodecContext *avctx, AVFrame
> *picture,
> >                     picture->height * img->r_w,
> >                     picture->width * img->r_h,
> >                     INT_MAX);
> > -        ff_set_sar(avctx, picture->sample_aspect_ratio);
> >
> >           if ((img->fmt & AOM_IMG_FMT_HIGHBITDEPTH) && img->bit_depth ==
> 8)
> >               ff_aom_image_copy_16_to_8(picture, img);
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