I've attempted to import an HD Quicktime file into FCP to play it out to tape. A client has asked me to output it to a 23.98 HDCam SR tape.
The file they gave me is a 90 minute feature at 24fps Uncompressed Quicktime.
My Mac has a KONA card in it, so I figured I could just drop this into a 23.98 Uncompressed timeline, give it a render and away I went.
I noticed that after the render was finished, half way through the feature, the audio channels just explode into piercingly loud distortion.
I tried tinkering a bit by adding some filters to the audio, then deleting them to "unrender" it and try giving the audio a re-render. Again, the distortion kicks in after too long (20 minutes or so). I also noticed random occurrences of the audio being knocked WAY out of sync in some areas.
I'm curious if anyone can offer some insight beyond "ghosts in the machine" as to why these issues are happening.
Supervisor, Non-Linear Technologies
635 Queen St E. Toronto, ON
MacPro 8-core Xeon 2.8GHz, 10gb Ram, AJA Kona 3 SD/HD
[Dan Charrington]"The file they gave me is a 90 minute feature at 24fps Uncompressed Quicktime."
24 or 23.976 (aka 23.98)? That file must be gigantic.
What are the audio specs? aiff, 48kHz, 16 or 24 bit? If not, that could be the problem.
I'm thinkin' a trip through Compressor to convert that giant file to ProRes 422 would do the image quality absolutely NO harm. You wouldn't need to render a 90-minute FCP timeline, perhaps sidestepping that audio issue.
Ever do any work with Steve Roberts of Reid-Roberts Digital Studios at the corner of William Hancox Ave. & Gerrard St. E, near the Danforth station in Upper Beach? A very talented guy, and a fine gent to boot.
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA