[Mp4-tech] Frame rate in h.264

[Glenn Connery]

In MPEG-2 you could just parse the SEQ header and pull out some bits to 
determine if the frame rate is 29.97/NTSC or 25/PAL or whatever.
I don't see any obvious way to determine this from a .264 stream, other 
than by figuring it out based on the number of frames and the time 
elapsed, but given that there could be repeats that might be more 
complex than I'd like.  
Thanks,
Glenn