[Guest]

Originally Posted by nixo

You could always use level 4.0. I've been told that doesn't require slices to be BD compliant.

Correct. From the spec:

9.5.1.3.1 Parameter limits

[...]
If level_idc in SPS indicates level 4.1, each picture shall be encoded as multi-slice picture with 4 or
more slices per picture. The number of macroblocks in any slice shall not exceed 1/2 of the total
number of macroblocks. The number of macroblock rows in every slice in the picture should be as
equal as possible for the current picture height and interlace coding mode.

* In case of 1920x1080 video format with frame_mbs_only_flag=1, it is recommended that
each slice has 17 macroblock rows (17/17/17/17 configuration).

* In case of 1920x1080 video format with frame_mbs_only_flag=0 and
mb_adaptive_frame_field_flag=0, it is recommended that in each field, odd numbered slices
have 8 macroblock rows each and even numbered slices have 9 macroblock rows each
(8/9/8/9 configuration) or some similar configuration.

* In case of 1920x1080 video format with frame_mbs_only_flag=0 and
mb_adaptive_frame_field_flag=1, it is recommended that odd numbered slices have 16
macroblock rows each and even numbered slices have 18 macroblock rows each
(16/18/16/18 configuration) or some similar configuration.

* In case of 1280x720 video format, it is recommended that four slices have 11/11/11/12 or
some similar configuration.