#11109: Matroska output format missing supported video codec tags
(additional_video_tags)
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Reporter: SuRGeoNix | Owner: (none)
Type: defect | Status: new
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: matroska | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Description changed by SuRGeoNix:
Old description:
> AVOutputFormat.codec_tag does not include ff_mkv_codec_tags
>
> In matroska.c there is a comment
>
> "If you add a tag here that is not in ff_codec_bmp_tags[] or
> ff_codec_wav_tags[], add it also to additional_audio_tags[]or
> additional_video_tags[] in matroskaenc.c"
>
> but additional_video_tags are not specified.
>
> Wondering if generally we could trust codec_tags for output formats to
> check whether is supported or not by the specified format.
New description:
AVOutputFormat.codec_tag does not include ff_mkv_codec_tags
In matroska.c there is a comment
"If you add a tag here that is not in ff_codec_bmp_tags[] or
ff_codec_wav_tags[], add it also to additional_audio_tags[]or
additional_video_tags[] in matroskaenc.c"
but additional_video_tags are not specified.
Similarly, avi supports hevc but it is not included in codec_tag list but
it will work if you set the codec_tag in the output stream's codec params.
Wondering if generally we could trust codec_tags for output formats to
check whether is supported or not by the specified format.
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Ticket URL: <https://trac.ffmpeg.org/ticket/11109#comment:1>
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