[FFmpeg-devel] [PATCH 2/2] avcodec/jpeg2000dec: jpeg2000 has its own lowres option

[Paul B Mahol]

On Sat, Jun 24, 2023 at 12:53 PM Tomas Härdin <git at haerdin.se> wrote:

> lör 2023-06-10 klockan 20:31 +0200 skrev Michael Niedermayer:
> > jpeg2000 overrides the global lowres variable with a lowres field
> > called reduction_factor
> > ffmpeg -lowres X causes the reduction_factor to be set
> > ffplay -lowres X causes both lowres and the reduction_factor to be
> > set
> > ossfuss sets only lowres
>
> Why does jpeg2000dec have its own -lowres? Does lavc reset it somewhere
> to where the decoder can't make use of the avctx-level setting?
>
>
Libav removed lowres from avctx, but same was not done here.

IMHO lowres is codec-specific thing and only codecs supporting it should
have private option to change it.


> /Tomas
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