Comments

farss wrote on 3/16/2007, 7:06 PM
OK,
first question, how to open a dpx file in Vegas?

Bob.
David Newman wrote on 3/16/2007, 7:30 PM
Oopps! I thought dpx was generic this days (they are uncompressed 10-bit RGB files.) Load them in AE or Photoshop, and save them out as Targas (TGA files.)
fldave wrote on 3/16/2007, 9:44 PM
"Load them in AE or Photoshop, and save them out as Targas (TGA files.)"

Not to be a pain in your bu%%, David, but the files would not open in my Photoshop Elements 2.0 program, and this is a Vegas forum.

From Photoshop: "Could not open viper1.dpx because it is not the right kind of document."
Coursedesign wrote on 3/16/2007, 11:36 PM
Photoshop Elements is not full Photoshop by a wide margin, and that's why it is less than one fifth of the cost.

It is actually very common to use Photoshop as an adjunct tool for advanced video work, but that wouldn't normally include Photoshop Elements, especially not PS Elements 2 which is lacking key features such as the easy masking tool that is in PSE 4.
David Newman wrote on 3/17/2007, 12:01 AM
Yes, I was talking about using the full Photoshop. DPX files are now standard for film scan or film exports -- Vegas should add support. These are 10-bit files so you need a higher-end imaging tool (rather than the lite versions of Photoshop) to open them.

David Newman
CTO, CineForm
MH_Stevens wrote on 3/17/2007, 12:13 AM
Dan:

Here is my take:

BEST---Viper2..........best color and definition
2nd-----Viper4...........close to best in color lost just a little definition
3rd------Viper3...........noticeable blending of pixel colors
4th------Viper1........... similar to #3 with just a bit more lost definition

Michael
farss wrote on 3/17/2007, 12:29 AM
For anyone who hasn't got AE or PS try: http://www.graphicsmagick.org/

Not exactly user friendly but it is free.

Probably a pretty handy piece of code for anyone who did need to get DPX files into Vegas.

Bob.
David Newman wrote on 3/17/2007, 9:42 AM
I won't say if Michael has any right or wrong, would others like to try. I'm collecting statics on users ability to tell compressed from uncompressed. If you are interested in playing, please email me your conclusions.

David Newman
cineform.blogspot.com
GlennChan wrote on 3/28/2007, 12:08 PM
The results are up...!

And my revised/second guess about the images were correct, although I cheated.

To figure out the HDCAM image, you throw it in Photoshop and use the difference composite mode. The HDCAM image is the one where the noise is in blocks.

To figure out the non-greenscreen Cineform, it's the one with more red and blue noise than green noise/difference. We're more sensitive to errors in the green channel, so that's why Cineform to optimized for better performance in green.

To figure out greenscreen Cineform versus uncompressed, see
http://www.reduser.net/forum/showthread.php?t=1218&page=2

2- If the images were given in isolation (i.e. you can't compare them to one another), then I think it would be impossible to tell the difference.
i.e. CF shooting scene A.
CF greenscreen shooting scene B
uncompressed shooting scene C
HDCAM SR shooting scene D

Then figure out which is which...