Strange posterization/color banding effect (CS5.1/CS6)

Stumbled over a strange effect with only one of my photos:
As usual, I made basic development on a DNG file in Lightroom 4.1RC2. Then, again as usual, I select "edit in Photoshop" in the context menu in the library grid. Both Photoshop CS5.1 and CS6 open the DNG and show me an image where I can clearly see strong posterization in the blues.
I save the psd file and go back to LR4: When I let LR4 display the psd, everything looks allright, as if there never was posterization! Looks like the original dng! Tried to apply different color spaces, reducing bit depth, no success.
Only cure for me at the moment is to open the dng in Photoshop and then switch to 16 bit mode... First thought it's somehow a LR4 issue, but on the other hand, LR4 displays the psd file correctly, Photoshop doesn't...
Andreas

OK, so the problem is something in the GPU color conversion path.
That could be a driver bug, a GPU limitation (some older cards don't interpolate correctly, and fail to say so in the driver), a problematic display profile, or a bug in the Photoshop GPU display code.
Since this happened in 5.1 and 6, I'd bet on one of the first 3 items.
Which GPU/video card are you using?
Which GPU driver version?
(you can look in Help->System Info for that)
Can you post your display profile somewhere so we can take a look?
And what profile are you using for your documents?

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http://forums.adobe.com/thread/1146464
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Technical Info
MacOS X
10.6.8
CS6:
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Adobe Photoshop Camera Raw 7.3.0.71
CS5:
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Hi Bill, Here's the link the of the blown out footage. http://www.youtube.com/watch?v=4lxJJN2PgqM&feature=youtu.be
Date: Wed, 18 Jul 2012 17:20:37 -0600
From: [email protected]
To: [email protected]
Subject: Filters for Blown out camera and color shots for CS5
    Re: Filters for Blown out camera and color shots for CS5
    created by Bill Hunt in Premiere Pro CS5, CS5.5, & CS6 - View the full discussion
Well, a few Effects, that might help - a little, would be Curves, Levels and Shadow & Highlight, along with the Three-way Color Corrector. However, the success will depend on the footage. Can you post a Vimeo, or YouTube example, as once one sees what you are working with, they may have other ideas. Good luck, and welcome to the forums, Hunt
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Sony NEX-5N AVCHD 2.0 1080p50 and Premiere Pro/After Effects CS5.5

Hi all,
I have a new Sony NEX-5N and have shot some test 1080p50 video using it.
On my quest for some new editing/production software to close the loop I have just downloaded and installed a Trial Version of CS5.5 Production Premium.
I am able to load my video files into Premiere Pro.
However, when I attempt to open the Video File in After Effects, I recieve the following Error message:
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I have tried renaming the extension to .MPG, .M4V, .M2TS all with exactly the same result.
Perhaps this is a limitation of the Trial Version or perhaps a limitation of After Effects CS5.5. Is anyone able to advise?
As extra information I include below the TEXT output from MediaInfo for the file I am able to load into Premiere Pro CS5.5 but not After Effects.
Thanks.
General
ID                               : 0 (0x0)
Complete name                    : F:\AVI\Video\SourceMedia\00023.MTS
Format                           : BDAV
Format/Info                      : Blu-ray Video
File size                        : 61.8 MiB
Duration                         : 19s 616ms
Overall bit rate mode            : Variable
Overall bit rate                 : 26.4 Mbps
Maximum Overall bit rate         : 28.0 Mbps
Video
ID                               : 4113 (0x1011)
Menu ID                          : 1 (0x1)
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : [email protected]
Format settings, CABAC           : Yes
Format settings, ReFrames        : 2 frames
Format settings, GOP             : M=1, N=12
Codec ID                         : 27
Duration                         : 19s 680ms
Bit rate mode                    : Variable
Bit rate                         : 25.1 Mbps
Maximum bit rate                 : 26.0 Mbps
Width                            : 1 920 pixels
Height                           : 1 080 pixels
Display aspect ratio             : 16:9
Frame rate                       : 50.000 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.242
Stream size                      : 58.8 MiB (95%)
Audio
ID                               : 4352 (0x1100)
Menu ID                          : 1 (0x1)
Format                           : AC-3
Format/Info                      : Audio Coding 3
Mode extension                   : CM (complete main)
Codec ID                         : 129
Duration                         : 19s 680ms
Bit rate mode                    : Constant
Bit rate                         : 256 Kbps
Channel(s)                       : 2 channels
Channel positions                : Front: L R
Sampling rate                    : 48.0 KHz
Bit depth                        : 16 bits
Compression mode                 : Lossy
Stream size                      : 615 KiB (1%)
Text
ID                               : 4608 (0x1200)
Menu ID                          : 1 (0x1)
Format                           : PGS
Codec ID                         : 144
Duration                         : 19s 135ms

Hi and thanks, this is exactly what I am looking for :-)
Tim Kurkoski wrote:
Other question: Is it just this one file that fails to import or is it all files from that camera?
All of the clips I have recorded fail to import to AE but work in PPro
Tim Kurkoski wrote:
Can you post a sample file that exhibits the problem so that I could try the clip on my machine?
I just recorded 4 seconds of a clock pendulum swinging, surprisingly the file was 20Mb!?!? Anyway, I have made the file available for download at the following location:
http://andrew.net.au/~rowan/avchd/00032.MTS
You can browse the directory at http://andrew.net.au/~rowan/avchd/ if you need to "right-click" and save as.
I am hoping it is a limitation of the trial as I have noticed a few other "gotchas" with the trial version.
Thanks for the advice about video format, I have noticed that my computer (Core 2 Duo) is very slow to process the H.264 stream, PremierePro cannot play the 30sec stream in realtime (starts to stutter around 23sec) and After Effects starts its stutter almost immediately (both just playing the stream with no effects) - that said WindowsMediaPlayer has no problem playing the same stream at full speed. I am however reluctant to do any transcoding except to a lossless format as it seems counter intuitive - but this will be the subject of another post, as I don't want to clutter this one.
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