Final Cut Pro 5.1.1, Panasonic Varicam, Panasonic 1200A deck and Audio Sync Issues

[Mark Raudonis]

How are you monitoring audio? Firewire introduces a 5-8 frame delay relative to the audio coming out of the computer. In other words, if you’re monitoring “built in” audio from the computer, it will be 7 frames off from the picture going out to the NTSC monitor from the deck. The only way around this is to use a capture card like the AJA or Blackmagic. Firewire will always cause a delay.

However…. the actual files ARE in sync. Check the waveforms against a slate.

Mark

[Shane Ross]

God I hate being contrary, or the exception, but when I playback the footage on my canvas and have my mixer connected via the Built In audio port, there is no delay…0 frames. If my mixer is connected via firewire, 0 frame delay. if I monitor on my HD monitor thru my decklink HD card…0 frame delay.

Shane

Littlefrog Post
http://www.lfhd.net

[Mark Raudonis]

Shane,

It’s not the firewire audio (your mixer) that causes the delay, it’s an external firewire VIDEO box like the AJA i/o that is the culprit. Your Decklink card is internal, so it’s on the fast bus, hence no delay.

mark

[Cleditor]

thanks for all the input. i am monitoring the audio and video on my 23″ apple display. the deck is not even connected when i’m watching the playback of my captured clips. so, how could the firewire be the issue? unless, the delay is happening upon capture?
c

thanks,
c

[Kevin Monahan]

No FireWire, then it has to be your playback offset.

System Settings > Playback Control > Frame Offset = 0

Kevin Monahan
Take My FCP Master’s Workshop!
fcpworld.com
Pres. SF Cutters

[Shane Ross]

[Mark Raudonis] “It’s not the firewire audio (your mixer) that causes the delay, it’s an external firewire VIDEO box like the AJA i/o that is the culprit. Your Decklink card is internal, so it’s on the fast bus, hence no delay.”

Ahhh…Thanks Mark. I will admit that I don’t know technical reason as to why things work certain ways, just that they work or don’t work. My mind is too much focused on the story to dig into the why.

Shane

Littlefrog Post
http://www.lfhd.net

[Cleditor]

the frame offset is set at 0. any other ideas?

thanks,
c

[Mark Maness]

If that is the case and its still doing it…. Set your frame offset to 9. That is what the frame offset is for, you know.

_______________________________

Wayne Carey
Schazam Productions
http://www.schazamproductions.com

[Cleditor]

wayne, i do know what the frame offset is for and i have already tried that. i have tried adjusting the audio/video settings >device control>playback offset, audio/video settings >device control>capture offset, and system settings >playback control>frame offset. so far none of this is working.

thanks,
c

[Mark Maness]

Have you tried to monitor the audio from the deck?

_______________________________

Wayne Carey
Schazam Productions
http://www.schazamproductions.com