[Mp4-tech] Frame rate in h.264

[Gary Sullivan]

MPEG-2 is primarily a fixed frame-rate specification.
For the corresponding fixed frame-rate functionality in H.264/AVC, see
the semantics of the syntax element "fixed_frame_rate_flag".
Best Regards,
Gary Sullivan
+> -----Original Message-----
+> From: mp4-tech-bounces lists.mpegif.org 
+> [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of Glenn Connery
+> Sent: Wednesday, July 13, 2023 5:02 PM
+> To: mp4-tech lists.mpegif.org
+> Subject: [Mp4-tech] Frame rate in h.264
+> 
+> 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
+> 
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