[Mp4-tech] Mpeg4- part2 video time issue

[Veni Soni]

Folks:
There is a ambiguity regarding the vop_time_increment.
Say as for example difference between each frame is 1
tick of vop_time_increment_resolution. Then what
should be the value of vop_time_increment of last I
frame(shown below). Whether it should be 1 or 4.
Assume there is no GOV inbetween.
frames                   I      P      P      I
molulo_time_base         0      0      0      0
vop_time_increment       1      2      3      1/4
veni
enJOY life
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