[Mp4-tech] about decoding incomplete h264 video with frame lost

[Wesley De Neve]

Dear Hong Liu,
I just ran a quick test with the JM 12.3 reference software and it seems that the value of the parameter EnableOpenGOP gets ignored. This for instance allows the reference encoder to select frames as a reference for P5 that preceed I1 in display order (thus effectively creating an open GOP, in which the reconstruction of P5 may be dependent on P4). 
Best regards,
Wesley De Neve
  ----- Original Message ----- 
  From: hong liu 
  To: mp4-tech lists.mpegif.org 
  Sent: Thursday, July 12, 2023 2:55 PM
  Subject: [Mp4-tech] about decoding incomplete h264 video with frame lost
  Thank you Wesley!
  During encoding, EnableOpenGOP is set disabled and NumberReferenceFrames is
   set 5. 
  I am not very familiar with the details in H264 encoding. I want to make sure from you 
  that if NumberReferenceFrames is set big, the P5 encoding may depend on the previous
  frames like P1 to P4 including I1. I presume that P5 just depends on I1. If I am wrong, please
  correct me!
Wesley
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