SRT latency, it is only needed to be set one side or both ?

[salvaaod]

I have not yet find a definitive answer to this, generally is always advised to set latency in both sides, I have a system in which the SRT listener, a hardware IP camera, does not have the ability to set latency but in the caller, a software receiver, I can set the latency.

Does SRT latency is applied if only set in the caller side?

Thanks for your help.

Salva

[ethouris]

The setting on both sides matters. The effective latency for the connection is the maximum value of the latency settings on both sides (although separately per direction). The default value is 120ms, so if you set a bigger value on one side (doesn't matter which one), it will usually suffice.

[salvaaod]

The setting on both sides matters. The effective latency for the connection is the maximum value of the latency settings on both sides (although separately per direction). The default value is 120ms, so if you set a bigger value on one side (doesn't matter which one), it will usually suffice.

So, if in this case I cannot set a latency in the TX side (camera, listener) and I can set a latency target in the RX side (monitor, caller), what will be the behavior ?

Salva

[ethouris]

Meaning, the only device you have the access to, to apply the setting, is the monitor (which is receiver)?

If you set, say, 250ms latency on the monitor, you'll have 250ms latency (as >120). If you set less than 120, you'll have 120. Note that it's true only as long as the camera's SRT application doesn't have this default 120 value somehow overridden.

The latency can be set differently per direction, if you want to set only in one direction, then it's SRTO_RCVLATENCY on the receiver and SRTO_PEERLATENCY on the sender. Usually you don't use both directions and therefore not care which direction you configure, so you can configure it in both directions using SRTO_LATENCY option.