Inconsistancy.  The number of frames per region is not constant.
Inconsistancy.  Too few frames within a single region.
 1         11         74
 2         75        103

 1       3549         11         27         43         59
 1       3548         12         28         44         60
 1       3547         13         29         45         61
 1       3546         14         30         46         62
 1       3428         15         31         47         63
 1       3429         16         32         48         64
 1       3430         17         33         49         65
 1       3310         18         34         50         66
 1       3309         19         35         51         67
 1       3308         20         36         52         68
 1       3187         21         37         53         69
 1       3188         22         38         54         70
 1       3189         23         39         55         71
 1       3190         24         40         56         72
 1       3311         25         41         57         73
 1       3431         26         42         58         74

 2       3552         75         91
 2       3552         76         92
 2       3551         77         93
 2       3550         78         94
 2       3432         79         95
 2       3433         80         96
 2       3434         81         97
 2       3314         82         98
 2       3313         83         99
 2       3312         84        100
 2       3191         85        101
 2       3192         86        102
 2       3193         87        103
 2       3194         88
 2       3315         89
 2       3435         90