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Old January 21st, 2009, 10:45 PM   #1
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Crush problem solved - QT 7.6

From Stu:

ProLost: Quicktime 7.6 Fixes 5D Movies
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Old January 22nd, 2009, 01:07 AM   #2
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Spread the word: it works! This is a big deal.

Fixes the clipping also. No more need for cumbersome work-arounds.

Yay!
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Old January 22nd, 2009, 02:26 AM   #3
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Great news, I can't wait to test this one

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Old January 22nd, 2009, 06:11 AM   #4
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funny, I saw the quicktime update come in today, but delayed installing it due to a massive archiving/copying job I'm enduring... now can't wait for the last 500GB to copy!
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Old January 22nd, 2009, 09:05 AM   #5
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Now we just need a easily accessible transcoding app
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Old January 22nd, 2009, 12:38 PM   #6
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Yea!

On Tuesday I did a presentation on the 5D Mark II to the local Final Cut Pro group. I shot this footage live in front of the audience and transcoded the "before" clip using QuickTime 7.5.5 in Compressor, it's the one on the right. I upgraded to 7.6 and recompressed today using the same Apple ProRes setting. You can see the "after" on the left. Look at the difference in shadow detail.
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Crush problem solved - QT 7.6-qt76.jpg  
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Old January 22nd, 2009, 12:42 PM   #7
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Does this help if you use Vegas to edit?
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Old January 22nd, 2009, 12:58 PM   #8
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It looks much better than before, on Vegas anyways. Histogram does show gaps though, worries me?! ...Performance still slow.
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Old January 22nd, 2009, 01:39 PM   #9
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There's no question that it's completely fixed on my system. It's a "whole" image for the first time - like a new camera. Thanks for a quick response Apple. Now I'm really psyched.
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Old January 22nd, 2009, 04:51 PM   #10
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strange, just ran the update and seeing no change here...
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Old January 22nd, 2009, 05:36 PM   #11
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But is it stable?

Quote:
Originally Posted by Mike Calla View Post
It looks much better than before, on Vegas anyways. Histogram does show gaps though, worries me?! ...Performance still slow.
I can handle slow, but is it stable? I was never able to get in more then a dozen or so clips before it crashes.

Am I the only one with this problem? I would love to use proxies, but I can never revert back to the originals without crashing.
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Old January 22nd, 2009, 07:07 PM   #12
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Quote:
Originally Posted by Rich Castro View Post
I can handle slow, but is it stable? I was never able to get in more then a dozen or so clips before it crashes.

Am I the only one with this problem? I would love to use proxies, but I can never revert back to the originals without crashing.
you're not the only one - I reported the same problem in the original thread I started yesterday. The very first project (Vegas) I tried re-rendering had 30 clips, so when I switched out the proxy files, it simply crashed. I was hoping it might be something limited to my system configuration :(. Oh well, maybe 7.6.1 will come out in 6 months and it will fix it.
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Old January 22nd, 2009, 07:29 PM   #13
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The new Quicktime solution is good for a quick fix. It works in Vegas. (I don't know about other NLEs. Sorry.) However, be aware of the following:
* The new Quicktime decoder captures the blacks and whites (yay!), but slightly increases the gamma. Your mid tones will be brighter, and there will be some black stretch.
* The adjustments are done with an 8-bit output. The result is gaps and peaks in the histogram. This could lead to slightly more contouring and quantization error.

Fortunately,
* You can still do the re-wrap trick in Vegas. You still need to do the re-size and re-center thing.
* The re-wrap levels are the same as before - perfect. There are no gaps all the way from 0 to 255.

The Bottom Line:
* Upgrade!
* Feel free to use the MOV file for quick work, especially if you don't plan to color correct.
* Maybe the brighter gamma levels look good, maybe not. It's a judgment call.
* Rewrap to MP4 if you want the best possible quality, don't want the boosted mid-tones, or if you plan to color correct. For color grading, you want all the levels you can get.

I would prefer if the decoded output was more faithful to the camera output, but I'm not complaining. The new decoder gives us a solution for fast turnaround, without the black crush. And we can still re-wrap for best quality.
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Old January 22nd, 2009, 09:48 PM   #14
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@Jon,

I can confirm that I'm getting the same results (gamma, mid-tones etc.) as you have, with both Premiere CS3 and Vegas 8.0c. I used the scopes to compare the 5D MKII 2 MOV file to a Cineform AVI file that was converted from the original MOV file.
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Old January 23rd, 2009, 03:38 AM   #15
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Quote:
Originally Posted by Jon Fairhurst View Post
Fortunately,
* You can still do the re-wrap trick in Vegas. You still need to do the re-size and re-center thing.
* The re-wrap levels are the same as before - perfect. There are no gaps all the way from 0 to 255.
If you do the rewrap, I made some scripts to make life easier for the re-size and re-center. Check out my post at http://www.dvinfo.net/conf/998409-post21.html
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