Re: [Avid-L2] How to Export XDCam50 HD 12Ch .mov Quicktime?

I did some testing today on my 10.12.6 startup drive with MC 2018.12.12.  If I do a quicktime export using custom I can choose XDCam50 24 in the QT Engine format settings.  Even though the audio settings don't offer 12 discrete channels as an option in the QT custom format audio settings with Avid in Direct Out it prompts that it overrides the QT custom audio settings.  I ended up with a .mov with 12 discrete mono audio channels.  It does come out with clean aperture on but I can turn that off with QT7Pro.  I checked the levels bringing it ama back into Avid and comparing to the original sequence and there is a microscopic change in level barely seen on the vectorscope and double diamond display.  Absolutely imperceptible to the eye and hardly to the scope.  Much less than things I've seen years ago.  I haven't checked my 10.13.6 startup to see if I still get those options running MC 2018.12.12. 

Here is another approach we got feedback on that has been used successfully:

You're right, this is kind of strange as xdcam is usually wrapped in mxf. We actually did this in a two-step process. We exported a normal xdcam50 out of Avid (direct-out audio), then re-wrapped it using Final Cut 7 (you heard that correctly). The great thing about FCP is that when the sequence setting is exactly the same as the codec, the export is only about 4 minutes. You just have to make sure you have an app like Perian installed so that FCP can read the xdcam natively. Then set up your timeline for the dub:

• Ensure your timeline start timecode matches the original XDCAM file.
• Audio - Config: Channel Grouped; 12 channel mono
• Ensure that your audio is patched correctly by right-clicking the area in the patch bay and ensuring every audio track is assigned.

Then do an old-fashioned sequence setting export (Don’t recompress/make self contained). There's one gotcha. FCP cannot export with a long file name (it will crash), so just export with a simple name like "304" and rename after export.

 

Note: It's up to how NBC handles their files, but we always rename and assign discrete QT audio channels inside of QT7. It's not always necessary, but we make sure the atoms are tidy in case their software is looking for audio assignment. 

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