Quote:
Originally Posted by rack04
Correct me if I'm wrong but doesn't Level 4.0 and Level 4.1 allow 5 ref frames for 1920x1080 and 9 ref frames for 1280x720?
One thing that I've noticed on my standalone Panasonic BD-35 while playing Blu-ray discs encoded with x264 is that it freezes with ref frames greater than 7 for 1280x720.
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From H264 specification by formula Int(MaxDPB * 1024 / 1.5 / (w * h)) where w=width, h=height and MaxDPB from table A-1 (H264 specs), give max 4 reference frames for 1080p with level 4.1 or 4.0, and 9 for 720p. But according Blu-Ray specs for 720p is alowed max 6 reference frames for level 4.1 or 4.0 and 4 ref frames for 1080p. Encoders such Sonic Cinevision and Elecard in their BD profiles always lock for more than 4 refs. So 4 ref, are safe value for all resolutions including SD material