From: lance.lmwang@gmail.com
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH 2/2] avcodec: add an AVCodecContext flag to export A53/SCTE20/DVD CC side data on demand
Date: Wed, 11 May 2022 21:30:37 +0800
Message-ID: <20220511133037.GA897@gmail.com> (raw)
In-Reply-To: <165227041068.13099.13911768827478787708@lain>
On Wed, May 11, 2022 at 02:00:10PM +0200, Anton Khirnov wrote:
> Quoting lance.lmwang@gmail.com (2022-05-08 09:17:01)
> > From: Limin Wang <lance.lmwang@gmail.com>
> >
> > some samples include both A53 and SCTE20 data. Before the commit, both
> > of the will be exported, so the CC data will be repeated or garbarge
>
> Why would it be garbage? That sounds like a bug.
> Why can't we just export both?
for A53/SCTE20/DVDCC are exprted by A53_CC side data and they're sharing
the same a53_buf_ref to store the data, so if stream contains CC wrapped
as ATSC A53 packets + the same data wrapped as SCTE-20 packets, the CC
data will repeated. We can consider to add a new side data type if necessary,
but it's preferable to export A53_CC even it's SCTE20, so we can't export
both by A53_CC still.
related topic for it:
https://trac.ffmpeg.org/ticket/9724
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20220427084949.73931-1-4rusxg@gmail.com/
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20180306222512.20124-1-ffmpeg@tmm1.net/
>
> --
> Anton Khirnov
--
Thanks,
Limin Wang
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next prev parent reply other threads:[~2022-05-11 13:30 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-08 7:17 [FFmpeg-devel] [PATCH 1/2] avfilter/src_movie: add dec_opts for the opened file lance.lmwang
2022-05-08 7:17 ` [FFmpeg-devel] [PATCH 2/2] avcodec: add an AVCodecContext flag to export A53/SCTE20/DVD CC side data on demand lance.lmwang
2022-05-11 12:00 ` Anton Khirnov
2022-05-11 13:30 ` lance.lmwang [this message]
2022-05-19 9:12 ` Anton Khirnov
2022-05-19 12:31 ` lance.lmwang
2022-05-18 13:43 ` [FFmpeg-devel] [PATCH 1/2] avfilter/src_movie: add dec_opts for the opened file lance.lmwang
2022-05-18 14:50 ` "zhilizhao(赵志立)"
2022-05-19 12:14 ` lance.lmwang
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