720 24pn to 1080 24p upconvert, and DNxHD or QT uncompressed

I've finished my P2, 720 24pn documentary in Avid and want to deliver a 1080 24p master on hard drive to put to HDCam tape for a Da Vinci color correction.
I've exported a quicktime reference to After Effects and nested the 720 project in a 1920 x 1080 composition (to include all the 4k photos and titles).
Is this the best way to upconvert 720 to 1080? It looks great...
And is using the DNxHD 175 10 bit codec for the quicktime export as good as an uncompressed 10 bit quicktime? The resulting file size on a 100 minute file is 150 GB's vs 1.5 TB's.....
I have searched and searched the forum, but it's not easy to find the Truth!!

FYI for anyone wondering in the future, this is what my Da Vinci artist said:
"At my day job, doing HD spots for Sony Pictures (who are very particular about picture quality), the editors are also using Avid's DNX compression. The settings they are using (at 1080 lines) are: 175X for 23.98 and 220X for 59.94. We've run tons of resolution tests and the clients find this acceptable quality for big media buys (Superbowl, American Idol, etc.)."
Another said that if my original content was film he would go uncompressed QT, but since it was P2, DNxHD 175 is the way to go.
And this article (now a year old) evaluated DNxHD vs ProRes422 and Uncompressed.....
http://www.studiodaily.com/blog/?p=97
excerpt:
As a control, I used Apples Uncompressed 10-bit 4:2:2 codec. I rendered the animation to the ProRes 422 (HQ), ProRes 422, Avid DNxHD 175, Avid DNxHD 115, and Avid DNxHD 36 codecs. (Note: The DNxHD flavors are specific to 1080/24p format video. The 30i versions would be DNxHD 220 and 145.)
After re-importing the results in After Effects, I placed each file in a composition along with the Uncompressed 10-bit 4:2:2 version and used the Difference transfer mode to illustrate where the compressed image varied from the uncompressed. The results were quite surprising.
The DNxHD 175 files difference from the uncompressed was barely visible to the naked eye, but the ProRes 422 (HQ) codec showed significant differences. In fact, in my test, the DNxHD 115 codec also outperformed the ProRes (HQ).

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x

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It will look a little choppy...in comparison to the actual 24p footage. You can try the Standards Converter from www.nattress.com and see if that does a better job. Demo is available.
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Tutorial:
http://library.creativecow.net/articles/rossshane/dvprohd/video-tutorial.php
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Hi!
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www.dangertree.com

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Moreover is this a bug or do we need to amend something on our system. As a note we've already matched pairs on the RAM and done all the other obvious stuff.
Regards
Daniel

Having the same issue with same format footage (1080/24p), the proposed solution works (a little). I can definitely playback a longer duration but it still drops frames. Even when putting a filter on and rendering it still drops frames.
Mike

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Thanks
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That may be as I did not change the settings on the camera when I rented it. I saw that it was 720 24pn and expected that would be ok. Guess I'll have to manually speed the footage up. It's a good thing I didn't need the audio.
Thanks

10 bit 1080/24P HD, downconvert in software?

I have 10 bit HD (from D5) 1080/24P material on a firewire drive for editing on a MetaSan dual 2.5 (8G RAM). Running FCP 5.02 with 10.4. It was encoded into a Blackmagic codec quicktime.
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This is for a feature trailer, need to show to investors in boardroom on HD Plasma or DLP.
thanks ,
Caleb
Good Film Maker, Bad workflow artist

Here's a test for you and them to run.
Take a series of respresentative clips. Wide gamut, fast action, brilliant colors, b&w, and so on.
Bring each clip into Compressor and generate a ProRes4444, ProResHQ, ProRes standard and ProResLT version.
Import all the clips into FCP and put the original 10 bit clip on the timeline then superimpose each version of the ProRes conversion using the Difference Matte. What do you see?
Now put each clip through the scopes and compare. What do you see?
Now play each on a broadcast reference monitor. What do you see?
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K

DVCPRO HD at 24PN will be fine on firewire 400 drives.
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I've got a video that was shot in 1080 24p in Apple ProRess 422
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Hi There,
I'm no expert here but i have just sent a video to youtube a very crude way but it looks pretty good and it was 1080.
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Once its on the desktop open the movie using Quicktime X, on the playback bar there is a little arrow icon, click this and there is an option to export to youtube, enter your user name and password and your away.
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Not an ideal solution but a quick and dirty way of getting your HD stuff onto youtube looking fairly decent !
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Regards,
Dave.

720 24pn to 1080 24p upconvert, and DNxHD or QT uncompressed

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