DV Info Net

DV Info Net (http://www.dvinfo.net/forum/)
-   Avid Editing Family (http://www.dvinfo.net/forum/avid-editing-family/)
-   -   Out from Premiere and into Avid ... (http://www.dvinfo.net/forum/avid-editing-family/137858-out-premiere-into-avid.html)

George Tasick November 16th, 2008 10:35 AM

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

Cliff Etzel January 11th, 2009 01:06 PM

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.

David Parks January 12th, 2009 08:23 AM

George,

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

Cheers, David

Perrone Ford January 12th, 2009 09:06 AM

Out of curiousity, why 145? Because it's 60i?

Bill Ravens January 12th, 2009 10:54 AM

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.

Perrone Ford January 12th, 2009 10:56 AM

Quote:

Originally Posted by Bill Ravens (Post 993683)
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

Bill Ravens January 12th, 2009 11:14 AM

Just quoting from the Avid Help page. No such thing as 30i. It's called 60i (29.97 frames per sec)

Perrone Ford January 12th, 2009 11:23 AM

Quote:

Originally Posted by Bill Ravens (Post 993699)
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.

David Parks January 12th, 2009 12:14 PM

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


All times are GMT -6. The time now is 06:52 AM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2019 The Digital Video Information Network