[FFmpeg-devel] [PATCH] avcodec/mpeg12dec: ignore scte20 captions when a53 data is also present

Michael Niedermayer michael at niedermayer.cc
Wed Mar 7 19:49:26 EET 2018

On Tue, Mar 06, 2018 at 02:25:12PM -0800, Aman Gupta wrote:
> From: Aman Gupta <aman at tmm1.net>
> Some streams include both a53 and scte20 data. Before this commit,
> the scte20 data would be used instead of the a53 data.
> See https://s3.amazonaws.com/tmm1/ccaptions/scte20plusa53.ts,
> which produced garbage captions since 3f1a540204a8c187f77b3805d.
> ---
>  libavcodec/mpeg12dec.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

why does the combination produce garbage ?
why should not both be exported or it be user selectable?

also turning one off for ever seems problematic for concatenated
sequences. not every sequence would need to contain both i guess

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

The greatest way to live with honor in this world is to be what we pretend
to be. -- Socrates
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