[FFmpeg-devel] [FFmpeg-user] BUG in use of extradata and extradata_size with dvb subtitles and teletext

Reimar Döffinger Reimar.Doeffinger at gmx.de
Wed Jan 1 01:12:17 CET 2014

On Mon, Dec 30, 2013 at 11:44:16AM +0200, Andriy Lysnevych wrote:
> Hi,
> We are almost done with patch that fixes DVB subtitles and teletext issues.
> We are doing 2 things in this patch:
> 1) Removing dependency on extradata. All the values that currently stored
> in extradatata will be generated from metadata. For example in case of DVB
> subtitles metadata will hold the following values:
> language
> subtitling_type
> composition_page_id
> ancillary_page_id
> This values will be used for correct PMT generation. The values can be
> comma separated because one DVB subtitle stream can carry few subtitle
> substreams of different language, type, etc.

Sorry, but metadata is still unacceptable for this.
You could change extradata to be in some textual format, but even that
is questionable.
If you want to specify _options_ to the muxer you should use the
_option_ support, not pass options as metadata, which they clearly are

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