[Mp4-tech] [H.264, Video] B as reference

[Gary Sullivan]

+> -----Original Message-----
+> From: mp4-tech-bounces lists.mpegif.org 
+> [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of Tomo
+> Sent: Wednesday, March 28, 2024 1:31 PM
+> To: mp4-tech lists.mpegif.org
+> Subject: [Mp4-tech] [H.264, Video] B as reference
+> 
+> Hi
+> 
+> I have a question.  Main profile, Level3. 
+> Can encoders create the bistreams that B frames as 'reference frame'?
Strictly speaking, there is no such thing as a B frame.  But the answer you are looking for is Yes.
+> 
+> One guy said "no, with this profile and level". But I could not
+> find exact wording in the standard.
There are no differences between profiles and levels on this issue, except that some profiles do not support B slices.
Best Regards,
Gary Sullivan
+> 
+> Thanks
+> 
+> 
+> Tomo
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