FCP edit to tape via firewire to AJ-HD1400 frame accuracy issue

[Fred Miller]

In my experience, machine control with firewire is not consistently frame accurate. If you’re off by a couple frames, well that’s about as good as it gets. Some on this board my claim frame accuracy with FW, but I’ve never seen it.

Also beware of audio pops and crackles when using FW to master with the AJ HD-1400. It was a known issue a couple years ago and I’m not sure if it was ever resolved.

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[Shane Ross]

I too have never gotten frame accuracy via firewire. A capture card is the only way in my opinion.

Shane

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[Walter Biscardi]

[Shane Ross] “I too have never gotten frame accuracy via firewire. A capture card is the only way in my opinion.”

ditto

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[James Anton]

I do have an AJA Kona card, so I will try going out SDI next. If I come straight out of the AJA into the AJ-HD1400 deck via SDI, will I need a HD reference signal to both the computer and the deck? I’m not sure if I have an HD reference generator (Tri-Level Sync, yes?).

[Bob Flood]

James

i beleive the 1400 will accept external timecode down the Firewire. I am not sure if FCP sends the sequence timecode down the firewire.

If so, just make a sequence of all the sequences you need to lay off, and do a print to video instead of edit to tape. If FCP sends the timecode down, it will be accurate.

If not, you either have to accept the 2 frame error, or find a way to use the RS422 control port on the 1400 which is Frame accurate, usually via a capture card or other such device.

hope this helps

“I like video because its so fast!”

Bob Flood
Greer & Associates, Inc.

[Herb Sevush]

James –

If your only off by 1 or 2 frames using firewire count yourself lucky. I had a 1200 that was off by 12. I got it down to +/- 1 by creating a capture pre-set, but it was never frame accurate. My 1400 is much better, but if you need frame accurate then you need to go SDI.

Herb Sevush
Zebra Productions

[Doug Beal]

The 1400 deck records 720P 59.94 or 1080i 59.94 depending on menu settings
you can use SD blackburst fine for this. If you don’t have a BB gen order an AJA Gen10 which will give you both black and/or tri level and 1 AES

If you can’t wait for ref lock the 1400 to incoming vid and put the Kona on freerun.
to QC put the deck back in internal ref and check your layoff.

Doug Beal
Editor / Engineer
Rock Creative Images
Nashville TN