Today when streaming a football match I had some issues with the match clock I use in vMix. As always I start the timer when the match starts and in my recording that was at 13 minutes and 13 seconds. The first half ended when exactly 1 hour had passed, so playing time ended up being 46 minutes and 47 seconds (if the math in my head isn't totally wrong). But the time on screen shows 44 minutes and 26 seconds when the half finishes, so that means the clock has been running more than 2 minutes slower than it should.

Any idea what could have caused this? I had the same issue in the second half too, so it was not just a one time thing. Never noticed this before and the only difference I really have done for this broadcast was to add a stinger for the instant replay, shouldn't really affect this I guess. I use the vMix Universal Title Controller to control the timer, but can't see that being the issue either.

@ Jedda

Is it not also possible the game clock is not properly calibrated?
AFAIK, the vMix timer runs off the internal clock of the computer, so if your computer clock runs slow, so will the timer.
2 minutes in less than an hour seems like quite a bit, but might not be easily noticed unless you have a secondary timer, as is the case here, so perhaps you need to investigate further, both your internal clock, and maybe the game clock with a third clock or stopwatch.
Just my thoughts.


Ice

I have no doubts that the time in vMix was incorrect this time since both the time in the video file, the referees clock (since he stopped the half before it's been 45 mins played) and the stadium clock is pretty much agreeing with each other :)

Also, I'm not talking about a 24 hour clock, just a timer that counts from 00:00 when I start it like any normal sports clock. Not sure if that has anything to do with the computer clock in general, but I will pay attention to the time on the computer and see if it seems to be normal if this happens again. Either way it seems strange that this hasn't happened before as far as I know.

This happen with us all the time, we noticed that vmix loses frames during live shows and recording, since the timer in vmix is related totally to vmix, so this what happen, when vmix somehow overload or loses frames, everthing related to calculation or time will get slower, thats why we are using now a flash based timer that runs outside of vmix, and I guess Martin knows about that and they will fix that soon.

I a past life I was involved in installation where the timing/scoring systems clock was used as a reference for all clock displayed in a broadcast. On the CG systems at the time we implemented a serial protocol that took the feed from the Daktronics system and displayed the number in a special, externally driven, real-time clock object. The protocol was relatively simple. This ensured that the bodcast clock was never out of sync with the stadium clock or scoreboard clock.

Think I might have solved the issue in my case, looks like it might actually have been Universal Title Controller which caused this. It had somehow created mutiple clocks and I think it may have used the time from another clock which was hidden in the background where I obviously haven't adjusted the time during half-time.