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AC3 to Videotape via SDI?
Anyone here do this?
Dolby Digital 5.1 mix comes in as AC3 file…
Some videotape formats support Dolby D or E in different ways.
The question…. how to get it from disk to tape in sync?JPO
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3 Replies
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In theory an AC3 file can be recorded as an AES stream to a digi beta or HDCam tape. The reason Dolby developed Dolby E was to have a better quality interchange than AC3 particularly as broadcasters were likely to decode and then recode as AC3 during transmit. Also it sit in an AES stream better and can be edited.
Have you tried dropping the file into FCP? That may be a way of getting it as an SDI embed. Be careful not to monitor this signal as it will be very high level noise. You can’t touch the gain or the data will be corrupted.
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Because AC3 is not an audio file, per se, and not editable, I don’t believe that it is eligible for importation into Final Cut. That’s difficulty #1. How to play it out? How to sync it up with picture on a videotape?
I understand the part about no touchy the gains… leave everything in the detent positions! or pay the price.
Maybe the thing will have to arrive on a DA88 and chase lock it.
JPO
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Hi JP,
About the audio formats supported by FC the Help quote AIFF, WAVE, Sound Designer II and single or multy-track QT movies. If you convert your AC3 to one of those formats, you can bring tem to FC with out any degradation.
Cheers,
rafael
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