[BC] Need audio delay buffer

[James Potter]

Ira:

Just how do you go about measuring that delay?  I don't have any HD video test equipment, but I do have pretty good eyes and ears.  I plan to put a camera on some guy in the pew singing a song over and over again, and adjusting the audio delay until the sound matches his lips on the BME screen display.  Don't see any reason to quantify the delay.  We're interlaced and 59.9494 Hz. (actually 60 is what BME prefers -- won't make a picture at 59.9494.) 

Don't have any transcoders in the video chain -- just a bunch of SDI - HDMI and vice versa converters.  Our video switcher is native SDI and all the other stuff is HDMI, so we have little black converter boxes all over the place.  That was a vendor's design, not mine. I did the audio RFP and that side of the booth is just the way I want it.  If we had spent $5000 more on a higher-grade Vaddio switch, we could have had all HDMI with no SDI converter boxes, but that's a lot of change in the collection plate, so we went this way.  It works, and produces nice videos -- we've done weddings and memorial services and regular services, and the video clarity and sharpness is comparable to commercial DVDs and HD TV.  No complaints. Just struggling uphill on the last rocky mile to the top. 

Thanks for your help and advice.
Regards/J