-
audio video sync
I am at a college, and we use Wirecast to broadcast events – sometimes lengthy ones like Commencement. There seems to be a slight lag of video to audio, which I think is to be expected because of the processing happening on the video side (correct?). However, we have observed the sync gap to increase over time, and when our techs test a stream by stopping and starting the stream in the QuickTime Player, the sync can worsen when the stream starts again.
I think I’m looking for rules of thumb here. Is there a compression (e.g. H.264 vs. MPEG-4) that maintains sync better than others? What factors/settings should I be adjusting to get the a/v sync under control?
I’m assuming that the slight lag that is present at the best of times would be handled by an audio delay device. If so, are there any recommendations of economical units?
Thanks. – Paul