This IS the Avid L2: Re: [Avid-L2] QT File from Avid through QT Pro chops beginning audio in FCP7?

Friday, October 2, 2015

Re: [Avid-L2] QT File from Avid through QT Pro chops beginning audio in FCP7?

I feel like a broken record here, but I'll go again:

MIXDOWN, then export QT Ref

If you are not mixing down first, you might run into problems. The last part of that sentence is enough for me never to chance it.

I won't guarantee that FCP7 will be happy for any of this, but I will guarantee that a video mixdown is the real and true solution to any problem stemming from bouncing through references.

On Fri, Oct 2, 2015 at 4:14 PM, John Moore bigfish@pacbell.net [Avid-L2] <Avid-L2@yahoogroups.com> wrote:

Having QC issues on a file that is fine on my end until I put it into QT Pro 7.

Have a sequence that is all ProResHQ. I added a black title at the beginning for the 1 sec pad and a black title at the end for 1 sec tail pad. I added audio silence from the Protools stems at the end 1 sec pad. Everything is rendered to ProResHQ. The show is 99.9% a long ProResHQ 422 sent from Resolve. The audio is 8 tracks of ProTools Stems 5.1 plus LtRt.

I export a QT reference from Avid then Save As in QTPro 7 after naming the 8 mono tracks to their channel postitions L,R,C,Lfe,Ls,Rs,Lt,Rt. The resulting file plays fine when Ama'd back and if I send it to ProTools it's correct. QC using FCP7 is missing the first 12 frames of audio after the 1 sec head pad when they view it in FCP 7. I can duplicate this behavior on my system. If I chop off the 1 sec head pad all is fine in FCP 7.

I went back and added the same 1 sec of silence media I added under the tail 1 sec pad to the head 1 sec pad but still the resulting self contained .mov is missing the first 12 frames of audio when viewed in FCP7. I can take the same file into Adobe Premiere CC2014 and the audio is fine. The head pad is a black title created in Avid as proreshq and rendered to proreshq. Like I said at first I had no audio media just filler but now with silent media there is still the issue in FCP 7

I have finally gone back to the Avid sequence and found there was 1 sec pad at the head of the audio stems and added that back in sync so the audio is one long chunk followed by the 1 sec silence media from the same stems placed at the end. Even this export has the issue in FCP 7. My last resort will be a full same as source export from Avid but this will then mixdown the audio so I will have to remarry the stems in QT Pro7. I will try just the resulting stereo audio file in FCP7 first to see it this behaves properly but I won't know till after the export.

Bottom line it appears that FCP 7 is no longer a viable way for QC houses to check files IMHO. Nothing after the missing audio is out of sync so what is FCP 7 doing to lose this audio. It seems to be related to the 1 sec pad at the head but I can't seem to nail the real culprit. Any suggestions welcome.

John Moore Barking Trout Productions Studio City, CA bigfish@pacbell.net