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long renders on edit to tape: What is going on?
I was wondering if anyone could expain this:
This week I had to output some sequences to HDCam. Using uncompressed 4:2:2, 10 bit 1920×1080 quicktimes, output via KONA 2, HDSDI. Timeline also has some SD material, uprezzed to match. Absolutely everything is rendered, yet when I go to insert edit onto tape, FCP kicks off a 15 minute render. I’m definitely not laying down any bars and tone or countdown, etc. Quality is set to “use playback settings.” The timeline gets pretty dense in some places, with motion effects and alpha transitions, but like I said, I’ve rendered everything. The timeline is over 70 minutes long. I’ve found that FCP will not try to render anything if I’m outputting a much shorter timeline, in the 4 minute range.
Does anyone know what exactly FCP is rendering during the “edit to tape” operation. Any tips to minimize the time this takes would be appreciated.
Matt Lyon
CORE Feature Animation
Toronto -
4 Replies
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It’s been a mystery since FCP2. If you open Terminal and force a list of currently modified files tyou still can’t tell what’s being rendered.
Last rumor I heard was it was the audio mixdown. Doesn’t matter how many times you do it, it never re-uses the same file so the audio gets rendered each time. It’s inexplicably silly.bogiesan
This is my standard sigfile so do not take it personally: “For crying out loud, read the freakin’ manual.”
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Have you really rendered everything?
Make sure that you have your “Render All->Both” set to render everything – proxy renders, audio mixdowns, etc. All the “colors” of the render bar should be checked off (err.. checked on?).
The default is set to NOT render real-time capable effects along with a few other types of renders (all of which ARE rendered when printing to tape).
Printing to tape is effectively the equivalent of exporting a self-contained QT movie.
Mike
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I’m definitely sure everything is rendered. We configure all our workstations from the start so that “render all” is set to render every item. On top of that, there are no real time capable effects in the timeline anyway. What’s interesting is if you leave items unrendered in the timeline, than select “edit to tape,” FCP will make two render passes. The first renders the outstanding items in the timeline (these render files will be preserved after the edit to tape). After, FCP does this mysterious second pass, which was the subject of my initial post.
Matt Lyon
CORE Feature Animation
Toronto -
hi
this is an old thread, but it still happenswe had limited success with creating a new timeline messing with the compressors, and copy/pasting.
but then it happened again, this time, the only thing i can think of, is that we are low on space on the RAID (doesnt make sense, because it is filling more space), or there is something that sees that the RAID is extremely fragmented. this second option is more of a superstition than anything else.
end result: try the suggestion, sometimes it works.
kenzan
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