From: Paul B Mahol <onemda@gmail.com>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH 2/2] avcodec/jpeg2000dec: jpeg2000 has its own lowres option
Date: Sat, 24 Jun 2023 19:54:25 +0200
Message-ID: <CAPYw7P6W+qnybAbjcQHdidpTEzLeXr4tRcai=OYeUXDMOqkMQw@mail.gmail.com> (raw)
In-Reply-To: <fc5b67641b8fc62e8c6ed1d7f8c5ecdcb5efadfd.camel@haerdin.se>
On Sat, Jun 24, 2023 at 12:53 PM Tomas Härdin <git@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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next prev parent reply other threads:[~2023-06-24 17:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-10 18:31 [FFmpeg-devel] [PATCH 1/2] avcodec/jpeg2000dec: Check for reduction factor and image offset Michael Niedermayer
2023-06-10 18:31 ` [FFmpeg-devel] [PATCH 2/2] avcodec/jpeg2000dec: jpeg2000 has its own lowres option Michael Niedermayer
2023-06-24 10:53 ` Tomas Härdin
2023-06-24 17:54 ` Paul B Mahol [this message]
2023-06-24 20:46 ` Tomas Härdin
2023-06-24 20:56 ` James Almer
2023-09-04 19:00 ` Michael Niedermayer
2023-06-24 10:50 ` [FFmpeg-devel] [PATCH 1/2] avcodec/jpeg2000dec: Check for reduction factor and image offset Tomas Härdin
2023-06-24 19:51 ` Michael Niedermayer
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