[FFmpeg-trac] #10434(undetermined:new): avformat_query_codec() unexpected results

[FFmpeg]

#10434: avformat_query_codec() unexpected results
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             Reporter:  csab6597  |                    Owner:  (none)
                 Type:  defect    |                   Status:  new
             Priority:  normal    |                Component:  undetermined
              Version:  6.0       |               Resolution:
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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Description changed by csab6597:

Old description:

> using the code
> {{{
> const AVOutputFormat* ofmt = av_guess_format("MP4", nullptr, nullptr);
> int supported = avformat_query_codec(ofmt, AV_CODEC_ID_VORBIS,
> FF_COMPLIANCE_STRICT);
> }}}
> I find the returned value of 1 surprising, which would be indicating
> support. Actually the result is always 1 no matter which compliance level
> is provided. And testing a few other codecs I found the same situation.
> For example AV_CODEC_AV1 also always checks out as beeing supported,
> which I expected not to be at least for more strict compliance levels??

New description:

 using the code
 {{{
 const AVOutputFormat* ofmt = av_guess_format("MP4", nullptr, nullptr);
 int supported = avformat_query_codec(ofmt, AV_CODEC_ID_VORBIS,
 FF_COMPLIANCE_STRICT);
 }}}
 I find the returned value of 1 surprising, which would be indicating
 support. Actually the result is always 1 no matter which compliance level
 is provided. And testing a few other codecs I found the same situation.
 For example AV_CODEC_AV1 also always checks out as beeing supported, which
 I expected not to be at least for more strict compliance levels??

 Edit: There seem to be some more incosistencies as for example the MP3
 container does not seem to have any supported codecs, not even
 AV_CODEC_ID_MP3?

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Ticket URL: <https://trac.ffmpeg.org/ticket/10434#comment:1>
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