There is now a small header for the MSU video files:
uint16_t framecount;
uint8_t std_frameduration;
uint8_t alt_frameduration;
uint8_t alt_durfreq;
framecount is the number of frames in the video.
std_frameduration is the usual duration of a video frame in SNES video frames.
alt_frameduration is an alternate duration
alt_durfreq specifies after how many frames the alternate duration should be used for a single video frame. The frame counter is reset afterwards.
This allows to use simple pulldown patterns.
e.g. for a 29.97fps video you need 2:2 pulldown (display every video frame for two SNES video frames).
In this case, std_frameduration, alt_frameduration, alt_durfreq are: 2, 2, x (any number is good for the freq in this case)
For 23.976fps video one would do 3:2 pulldown (displaying every other video frame for three SNES video frames).
The format would be: 2, 3, 1
Frame size is always 224x144, 32512 bytes (4 tiles wasted to save tilemap memory), followed by 512 bytes of palette.
