SUSPECT: [Mp4-tech] Type of Reference frames?

[Gary Sullivan]

Additionally, I would suggest learning about SEI messages relating to the "sub-sequence" concept (see Annex D).
Best Regards,
Gary Sullivan
+> -----Original Message-----
+> From: Gary Sullivan 
+> Sent: Monday, July 18, 2023 11:17 AM
+> To: '"김진영"'; mp4-tech lists.mpegif.org
+> Subject: RE: SUSPECT: [Mp4-tech] Type of Reference frames?
+> 
+> 
+> Pictures in which the slice header syntax element 
+> "nal_ref_idc" is equal to 0 are not used for reference.  
+> Other pictures may be used for reference.  This has nothing 
+> to do with the concepts of I or B or P prediction types or 
+> frame or field coding structure.
+> 
+> Best Regards,
+> 
+> Gary Sullivan
+> 
+> +> -----Original Message-----
+> +> From: mp4-tech-bounces lists.mpegif.org 
+> +> [mailto:mp4-tech-bounces lists.mpegif.org] On Behalf Of "???"
+> +> Sent: Sunday, July 17, 2023 10:21 PM
+> +> To: mp4-tech lists.mpegif.org
+> +> Subject: SUSPECT: [Mp4-tech] Type of Reference frames?
+> +> 
+> +> Hello, 
+> +> 
+> +> Thanks for the previous help.
+> +> 
+> +> In JM 9.3, I guess it used only I or P frames as reference 
+> +> frames for interprediction.
+> +> If B frames are also used, how can I see it?
+> +> 
+> +> Thank you in advance.
+> +> janis
+> +> -------------------------------------------------------------
+> +> -----------
+> +> NAVER :: Korea's No.1 portal service
+> +> www.naver.com
+> +> 
+> +> _______________________________________________
+> +> NOTE: Please use clear subject lines for your posts. Include 
+> +> [audio, [video], [systems], [general] or another 
+> +> apppropriate identifier to indicate the type of question you have.
+> +> 
+> +> Note: Conduct on the mailing list is subject to the 
+> +> Antitrust guidelines found at 
+> +> http://www.mpegif.org/public/documents/vault/mp-out-30042-Ant
+> +> itrust.php
+> +>