Epiphan API seems to be blocking

[dzhoshkun]

When using the broadcast daemon at an artificial frame rate of 80, it looks like the Epiphan video source always runs at most at 60 fps. So, possibly the Epiphan API calls are blocking. This is the conclusion Richard M, Richard W and I have reached on 15 May 2019.

As such, if this is indeed the case, there's no point in the broadcast daemon sleeping to enforce the frame rate, as it's implicitly enforced. A quick workaround is to specify a higher frame rate such as the artificial one quoted above.

[dzhoshkun]

A Windows test script for testing lag:

@echo off
setlocal ENABLEDELAYEDEXPANSION
FOR /L %%I (1,1,500000) DO (
echo !time!
)