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Old November 16th, 2008, 11:35 AM   #1
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Out from Premiere and into Avid ...

I have to deliver some HDV files that I originally imported into Premiere to a customer who wants to use them in Avid.

What format coming out of Premiere would best accomplish this?

Thanks
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Old January 11th, 2009, 02:06 PM   #2
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My understanding is to download the free DNxHD codecs, export the clips in Quicktime format using one of the AVID Editing codecs options.

Your client should be able to bring them into AVID no problem - although I have no first hand experience on this.
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Old January 12th, 2009, 09:23 AM   #3
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George,

Cliff is right. Specifically, you would export QT DNXHD 145.

Cheers, David
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Old January 12th, 2009, 10:06 AM   #4
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Out of curiousity, why 145? Because it's 60i?
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Old January 12th, 2009, 11:54 AM   #5
 
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The level of DNxHD you choose is really dependent on the bitrate of the incoming file. Hence, DNx145 is 145Mbps, good for 720p60/8 bit or 1080i/60 8 bit. If you want to go to 1080p/24, then DNx175 is called for. then Certain DNxHD bitrates even have the option for 10 bit, which is nice if you're doing any transitions/FX processing.
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Old January 12th, 2009, 11:56 AM   #6
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Quote:
Originally Posted by Bill Ravens View Post
The level of DNxHD you choose is really dependent on the bitrate of the incoming file. Hence, DNx145 is 145Mbps, good for 720p60/8 bit or 1080i/60 8 bit. If you want to go to 1080p/24, then DNx175 is called for. then Certain DNxHD bitrates even have the option for 10 bit, which is nice if you're doing any transitions/FX processing.
I'm familiar with the system, but there is no way an 1080i HDV file is anywhere near 145 Mbps. That's why I was curious how the bitrate was chosen. I know that 145 is the 8-bit recommendation for lowest quality 1080/30i
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Old January 12th, 2009, 12:14 PM   #7
 
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Just quoting from the Avid Help page. No such thing as 30i. It's called 60i (29.97 frames per sec)
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Old January 12th, 2009, 12:23 PM   #8
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Just quoting from the Avid Help page. No such thing as 30i. It's called 60i (29.97 frames per sec)
Sorry, the 30i was a typo. Avid's DNxHD codec whitepaper gives a chart with all the bitrates on it, and the supposed frame sizes, frame rates, and Mbps rates that correspond. For 1080/60i the rates given are 145, 220, and 220x (10-bit).

I was merely curious if the 145 was chosen because of this. I've found VERY little degradation of the original signal going from my EX1's 35 Mbps original to the DNxHD 36 Mbps encoding. So moving to a 145 seemed like a LOT just to hold HDV.
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Old January 12th, 2009, 01:14 PM   #9
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DNXHD 145TR (TR stands for transport stream) is the bitrate for 1080i HDV in Avid Media Composer using "smart splicing".

If you were to import a m2t into a 1080i HDV project, then your file would show up at that bit rate if you preserve original resolution (dialog appears on import). If you have setup a "full raster" 1080i project, then you can pick whatever bitrate you want(8 or 10bit) , but the file would be transcoded, which is not really a bad thing. It just depends on what your doing and where you are going.

Hope this helps, David
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