Re: [QLab] Solving sound delay with video

[Craig Williams]

A simple solution which I used to fix a video that came to me with lagging audio built into the recording was to sample the audio from the video and make it a separate file.
I made the cue a group cue with two files that played simultaneously: one was the video with its audio volume set to zero, and the second was the audio file copied from that video.
Then it's just a matter of tweaking the time of the pre-wait....delaying the video to match the audio, or vice versa.

Then if you get lag in another venue with a different set up, you can tweak it from within the program.

Cheers,
Craig

~<8>-/=====\--------

On 13 Sep 2011, at 20:47, stbo wrote:

> Ok, thank you. I have done some further investigation, and whilst I
> understand the answer, I have a further question about latency. I
> notice that there is a small delay between the audio and the video -
> just enough it make it obvious when watching someone talking. I
> would like to consider adding a small delay to the audio before
> feeding it into the PA - would there be any suggestions as to how best
> to achieve this - understanding that the budget is based on an amateur
> group's budget...
>
> I have access to wither Mac or Windows machines.
>
> Thank you.

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