Inconsistancy.  The number of frames per region is not constant.
Inconsistancy.  Too few frames within a single region.
 1         11         29

 1         11         29

 1       3028         11         22
 1       3152         12         23
 1       3274         13         24
 1       3275         14         25
 1       3276         15         26
 1       3277         16         27
 1       3278         17         28
 1       3156         18         29
 1       3155         19
 1       3154         20
 1       3153         21