[FFmpeg-devel] Handling dual language mono audio encoded as stereo

[Anssi Hannula]

Hi all!

Some nordic DVB channels encode e.g. four mono tracks with different languages 
into two stereo tracks (mpeg layer 2). The ISO639 language descriptor then has 
both language codes, separated by a null byte. This is probably a remnant from 
pre-DVB era, but we should somehow handle it nevertheless.

How should we handle this, what do you think?

Attached is a patch which simply sets language tag to e.g. "nor+fin" for dual-
language stereo tracks. Seems to show up correctly in ffplay (though of course 
there doesn't seem to be a way to choose a single channel from stereo track in 
ffplay).

-- 
Anssi Hannula
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