keycode based DPX files !??

	Re: keycode based DPX files !?? by Dave LaRonde on Jul 31, 2008 at 3:35:19 pm Keycode is similar to time code, but apparently it contains additional information that makes each frame of film more unique. Here's a definition of keycode: http://www.monacosf.com/articles/telecine_defs.htm Here's a thread I found on the topic, particularly useful for those with Macs: http://discussions.apple.com/thread.jspa?threadID=1003457&tstart=528 I'm far from an authority on the topic. I just did two googles: "dpx file" keycode, and film keycode. I also found this tidbit in the AE8 Help PDF file, page 86: Importing Cineon sequences You can import Cineon 4.5 or Digital Picture Exchange (DPX) files directly into an After Effects project as individual frames or as a sequence of numbered stills. Once you have imported a Cineon file, you can use it in a composition and then render the composition as a Cineon sequence. Cineon files are commonly used to transfer motion-picture film to a digital format. To preserve the full dynamic range of motion-picture film, Cineon files are stored using logarithmic 10-bpc color. However, After Effects internally uses 8-bpc, 16-bpc, or 32-bpc color, depending on the color bit depth of the project. Work with Cineon files in a 16- or 32-bpc project—by default, After Effects stretches the logarithmic values to the full range of values available. In most cases, you should use color management features to automatically interpret the colors of Cineon footage. (See “Working with Cineon footage items” on page 251.) You can, though, use the Cineon Settings dialog box to control the conversion manually. Manual settings in the Cineon Settings dialog box: Converted Black Point Specifies the black point used for the layer in After Effects. Converted White Point Specifies the white point used for the layer in After Effects. 10 Bit Black Point Specifies the black level (minimum density) for converting a 10-bit Cineon layer. 10 Bit White Point Specifies the white level (maximum density) for converting a 10-bit Cineon layer. Current Gamma Specifies the target gamma value. Highlight Rolloff Specifies the rolloff value used to correct bright highlights. To get over range values when working in 32 bpc, set the value to 0. Logarithmic Conversion Converts the Cineon sequence from log color space to the target gamma specified by the Current Gamma setting.When you’re ready to produce output fromthe Cineon file, it is important that you reverse the conversion. (To convert from logarithmic to linear, set Current Gamma to 1.) Units Specifies the units After Effects uses to display dialog values. See also “Set the color depth” on page 234 “Color management” on page 241 Dave LaRonde Sr. Promotion Producer KCRG-TV (ABC) Cedar Rapids, IA Respond to this post   •   Return to posts index