Thursday, August 21, 2014

PLUSPTYPE in H.263

PLUSPTYPE means an extended PTYPE, indicated by source_format syntax equal to ‘111’.  

PLUSPTYPE is absent for short header mode of MPEG-4 Pt2 decoder, the H.263 compatible mode of MPEG-4 Pt2 decoder.  

Though PLUSPTYPE can have custom resolution besides the limited 5 resolutions in short header mode of MPEG-4 Pt2 decoder, it is often not supported by commercial H.263 or MPEG-4 Pt2 decoders.

 
That is, when video contents are encoded in H.263 format, it’s better to not use PLUSPTYPE for compatibility, and be play-able on most devices.

No comments:

Post a Comment