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Importing DNxHD quicktime movies
I’m quite green when it comes to AVID, and I understand that all quicktime movies need to be converted to its MXF format upon import. That’s fine. However, I recently converted some files into DNxHD, thinking it was supposed to speed up the importing process. However, these DNxHD files still seem to be taking a really long time to import – so much that I get the feeling that it’s still reconverting them.
To get specific: I converted a video file into DNxHD, 1080i (1920×1080), 145mbit
The clip is 3m 12s long, and 3.13GB in size.
I made sure that my avid project settings matched this before I began importing. The movie still takes more than 10 minutes to import.So, my question:
If importing DNxHD files, shouldn’t the MXFs simply be “copying” rather than rendering a new file, therefore making the process quite fast? If I understand correctly, MXF is simply container, and the DNxHD data remains the same? Am I doing something wrong, or is this just “the way it is” ?
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4 Replies
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I think your import settings have to be set a certain way. I assume to 601/709 size and color, make sure your field order is correct for the project you’re in, and choose to ignore alpha. This may speed up the import.
Michael
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I’ll be working late. -
You make no mention of what version of Media Composer you are running or any system details at all. There were some buggy versions (prior to 3.0 I believe) for which fast import of DNxHD didn’t work.
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As Michael mentioned, make sure your RGB vs. 601/709 settings match. Any variation in settings will cause Avid to recreate the file as it is changing it on import.
If everything matches, it still takes a bit to import, but it is much faster and you should see the words “Fast Import” on the screen while it is importing.
Terence Curren
http://www.alphadogs.tv
http://www.digitalservicestation.com
Burbank,Ca -
Thanks for the responses guys.
I have indeed solved the mystery and gotten the “fast import” dialog box to display. Imports are faster now and I am happy.
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