Video latency on preview

farss wrote on 2/4/2004, 3:59 PM
I'm feeding the audio out to my 1394 sound box using ASIO drivers and the video out to external monitor via Canopus box. I find the video is lagging the audio by a good 1 second, yuck!

Works fine on internal monitor BUT I was hoping to run the video to outside the room so a client could watch and at the same time record VOs. With this amount of latency I don't think it's going to make the grade. I can see why this is happening, the 1394 ports are so busy feeding the audio the video stream is being delayed, I've also noticed the video gets a bit jittery.

I guess I can work around this although I'm not entirely certain how just yet and I don't need to solve it right away but maybe one of the gurus has a bright idea. If not maybe it's a good heads up on one of the limitations of using 1394 audio devices.

Perhaps one answer would be to increase the audio delay but I can not figure out how to this, anyone have any clues?

Comments

Flack wrote on 2/4/2004, 4:04 PM
Look at this link it worked for me... good
advice

http://mediasoftware.sonypictures.com/forums/ShowMessage.asp?MessageID=249785&Replies=2&Page=11

Flack

Randy Brown wrote on 2/4/2004, 4:31 PM
I had the same problem with my Delta 1010 ASIO drivers; I would try windows classic or the sound mapper drivers to see if it resolves the problem. If that doesn't work you can adjust the video frame latency in V4.
Randy
farss wrote on 2/4/2004, 6:24 PM
Flack,
nice try but the A/V is in sync on the T/L!
Getting it to play out in sync is the issue.
If I adjusted it on the T/L to compensate then it'll be out of sync when I PTT.
farss wrote on 2/4/2004, 6:26 PM
Randy,
good thoughts there. Excuse my ignorance but where do I adjust the video frame latency?

If I go to anything other than ASIO then I'm going to introduce latency on the record side of things aren't I?
Randy Brown wrote on 2/4/2004, 6:45 PM
The first thing I would try is go to options/preferences/audio device/and select different selections in the drop down (starting with "Windows Classic Wave Driver"). If that doesn't immediately solve your problem then jack with the slider under options/preferences/video device/sync offset.
>>"If I go to anything other than ASIO then I'm going to introduce latency on the record side of things aren't I?"<<
There's also an adjustment just under there for "Record Engage Delay" but I don't know...

If none of this works, I'd check back here in the morning and someone will surely have the right answer : )

Randy