Latency might be defined as the ‘transit time’ for I/v stream.  Each device in the video chain introduces some limited (transmission) delay. 

TriCaster’s latency is very minimal (as little as 1 frame), but you can take measures to keep it to a minimum – first and foremost, by genlocking your video devices – see Section 8.2.3. For genlocked sources, consider disabling TriCaster’s Frame Sync – see Section 8.1.1.

In a seemingly related matter, note that audio and video passing through TriCaster are always synchronized. However, aspects of the physical design for IMAG (video projection) installations can make mimic a sync issue for viewers at some locations in the auditorium.  These issues are discussed in detail in Section B.3, IMAG and Latency.

Supplementary Question:

Q:  Why does latency seem higher for certain video formats (i.e. 24p, 25p, or 30p)?

A:  TriCaster passes frames through the switcher at the appropriate frame rate. When the session format calls for frames at 60Hz, displayed frames are refreshed much more often than (for example) a 24p format. Consequently, apparent latency will also be less than half what it would be at 24Hz.

In general, the lower the frame-rate of the session video format, the higher latency will seem to be.

Section A.8.1

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