[FFmpeg-devel] [PATCH] avformat/id3v2: Add Grouping frame to id3v2.4 metadata table

[Anton Khirnov]

Quoting Wolfgang Müller (2022-02-13 14:46:33)
> The ID3v2.4.0 standard defines TIT1 as the "Content group description"
> tag [1]. This frame is usually referred to as the "Grouping" tag and in
> de-facto use under that name by Vorbis and APEv2 [2].
> 
> This commit introduces a mapping from "TIT1" to "grouping" in the
> id3v2.4 metadata conversion table. This will enable software to access
> it using that name. In particular, MPD will now read this tag correctly
> when using the ffmpeg decoder plugin.
> 
> [1] https://id3.org/id3v2.4.0-frames (4.2.1)
> [2] https://picard-docs.musicbrainz.org/en/appendices/tag_mapping.html#grouping-3
> 
> Signed-off-by: Wolfgang Müller <wolf at oriole.systems>
> ---
> 
> As evident from the commit message, I ran into this using MPD with the
> ffmpeg decoder plugin. MPD relies on these mappings heavily, and I found
> it the easiest place to fix this particular issue, especially if other
> pieces of software can also gain from this.
> 
>  libavformat/id3v2.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c
> index ff27c062e5..0f9bedea02 100644
> --- a/libavformat/id3v2.c
> +++ b/libavformat/id3v2.c
> @@ -69,6 +69,7 @@ const AVMetadataConv ff_id3v2_4_metadata_conv[] = {
>      { "TSOA", "album-sort"    },
>      { "TSOP", "artist-sort"   },
>      { "TSOT", "title-sort"    },
> +    { "TIT1", "grouping"      },
>      { 0 }
>  };
>  
> -- 
> 2.35.1

Looks ok, will push tomorrow

-- 
Anton Khirnov