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1080 29.97 Canon 5D footage to 23.98

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Erik Lutsch
1080 29.97 Canon 5D footage to 23.98
on Feb 4, 2013 at 6:22:11 pm

I have 30hrs of 5D material that was shot at 29.97 instead of the rest of the footage that was shot in 23.98. I need to convert it to 23.98. I have tried using Cinema Tools to convert the footage to 23.98 and the end result was a pitch change in the audio. Women in the interview sounded like men. My next attempt was that I setup a 1080 29.97 project and transcoded it to DNX45. 1 clip with a duration of 2hrs was going to take 11hrs.

Right now I'm transcoding in a 23.98 project, which I understand will not be able to link back to the original 5D footage. This is a development project and will probably never need to be uprezzed. I did a test and the clips appear to be acceptable. However, I would still like to understand what I have missed and a work around. Any help would be appreciated.


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Shane Ross
Re: 1080 29.97 Canon 5D footage to 23.98
on Feb 4, 2013 at 6:52:34 pm

Import all the footage into a 29.97 project. Then bring the bin into a 23.98 project. Avid will convert it properly. YOu can mix frame rates well in Avid.

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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Erik Lutsch
Re: 1080 29.97 Canon 5D footage to 23.98
on Feb 4, 2013 at 6:59:37 pm

I tried importing as well into the 29.97 project. I have some clips that are 2-4hrs in duration. The amount of time that it was going to take to import was always 24+ hrs. I let one 2hr clip import for several hours and the time was up to 88hrs. I'm running off an ISIS 5200, and no one else is tying up the system but me.


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Shane Ross
Re: 1080 29.97 Canon 5D footage to 23.98
on Feb 4, 2013 at 7:35:30 pm

You are importing? Transcoding to DNxHD? Or AMA and then Transcode?

And as I said, best to import/transcode into a project with the same timebase. That might make a difference

Shane
Little Frog Post
Read my blog, Little Frog in High Def


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Erik Lutsch
Re: 1080 29.97 Canon 5D footage to 23.98
on Feb 4, 2013 at 8:05:04 pm

I have tried both methods AMA/transcode and importing in a 29.97 project (dnx45). Both show incredibly long render times.

I'm currently transcoding in a 23.98 project, and the wait time is much better. 5hrs for a 4hr duration, instead of 88hrs for a 4hr file. I don't understand why there is such a difference and if anything the 23.98 transcode should take longer since its doing the frame rate conversion.


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Michael Phillips
Re: 1080 29.97 Canon 5D footage to 23.98
on Feb 4, 2013 at 8:06:09 pm

AMA then transcode is 2x faster than just an import as that process is multiprocessor aware.

I would, as Shane mentions, AMA into 29.97 project type, open bins in 23.976 project and transcode there. It will then create native 23.976 media.

If you need to ever go back to original sources, transcode in the 29.97 project, then open in the 23.976.


Michael


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