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AVIs need to be "read" from the hard drive and can create a bottleneck depending on certain conditions. Mattes and titles are stored within the project (and hence memory) so don't cause that same bottleneck.
Render before exporting to tape is SOP. Go with that.
Thanks, Jim, for your reply to this and other threads. (Warning: I had two other questions — been saving them up for awhile — that I'll post shortly. It was too late already last night).
> AVIs need to be "read" from the hard drive and can create a bottleneck depending on certain conditions.
Agreed, but unless there is partial opacity in the top Enabled track, only one track at a time is exported. And in the cases I cited, the unused clips were Disabled. No need for Premiere to read them at all. I assume the state of each clip is part of the Project.
Ah well, I was only curious if I was missing something obvious, or perhaps it was a known bug that would be addressed. Apparently the additional resources needed for tape export push Premiere over some edge. Remember, I can watch (even Preview) the sequence in the Monitor window without seeing this artifact.
> Render before exporting to tape is SOP. Go with that.
Naturally. And I do. And if I didn't, Premiere would do it for me automatically before opening the Export to Tape window.
Thanks again. On to the next thread.