On Tue, 22 Jul 2014, Ray Gauss wrote:
The info on what the streams are and how they relate can be conveyed via
PBCore, i.e.:
pbcore:instantiationTracks=1 video track, English and Spanish audio,
Director's commentary audio
Ah, that's good. Looks a sensible enough and easy to follow standard to
crib from
...
pbcore:instantiationEssenceTrack[0]/pbcore:essenceTrackType=Video
...
pbcore:instantiationEssenceTrack[1]/pbcore:essenceTrackType=Audio
pbcore:instantiationEssenceTrack[1]/pbcore:essenceTrackLanguage=eng
I'm not quite so keen on these metadata keys though. Do we gain anything
from this long form, vs
stream[0]/pbcore:essenceTrackType=Video
stream[1]/pbcore:essenceTrackType=Audio
stream[1]/pbcore:essenceTrackLanguage=eng
?
The current FFmpeg parser wouldn't be able to extract things like
annotations, but it was only targeting the intrinsic metadata.
The Ogg parsers should be able to output that fairly easily, the only
reason they don't is that I didn't know what to output as!
Nick
