VMS v17.4.5, playback, choppy when fast forwarded - 20230207

Questioin:
Why playback looks choppy when fast forwarded?

Answer:
VMS only plays key frames in the following situation. Please refer to the information below for our playback rules in v17.1~17.4.5B. Fortunately, the restriction for 1x speed playback will be cancelled in v17.4.6. In other words, when you playback more than 32 ch with 1x speed in v17.4.6, it will still play fluent full-frame video.

1. Under 1x speed, 32 divisions or above layout only plays key frames.
2. Under 2x speed, 24 divisions or above layout only plays key frames.
3. Under 4x speed, 16 divisions or above layout only plays key frames.
4. Under 8x or above speed, all divisions layout only plays key frames.
5. Single channel playback does not get affected by the rule above.

Reference:
[ UVS - 202301125001-L ] VMS v17.4.5B, choppy when playback 33ch or above