On Sun, Nov 05, 2006 at 02:09:52PM +0100, Johannes Sixt wrote: > On Sunday 05 November 2006 00:56, Nicolas wrote: > > Hello, > > > > While working on the manual, I noticed there are paragraphs about the > > following effects in Secrets of Cinelerra (v2.1): > > > > - Linearize > > This one *is* present in my version. > > > - Reframe > > - Resample > > These are not real-time effects. They are only available in Audio->Render > effect and Video->Render effect. > > -- Hannes
Hannes, I've found the Reframe and Resample effects. Thanks. However, I don't find the Linearize effect in Cinelerra CV (rev tried: r942 and r954. I see "Linear Blur", but that's not Linearize. It's written in Secrets of Cinelerra: "Raw camera images store colors in a logarithmic scale. The blacks in these images are nearly 0 and the whites are supposed to be infinity. The graphics card and most video codecs store colors in a linear scale but Cinelerra keeps raw camera images in their original logarithmic scale when it renders them. This is necessary because the raw image parser can't always decode the proper gamma values for the images. It also does its processing in 16 bit integers, which takes away a lot of information. The linearize effect converts the logarithmic colors to linear colors through a gamma value and a maximum value. The gamma value determines how steep the output curve is and the maximum value is where 1.0 in the output corresponds to maximum brightness in the input. The linearize effect has 2 more parameters to simplify gamma correction. The automatic option causes it to calculate max from the histogram of the image. Use this when making a preview of a long list of images since it changes for every image. The use color picker option uses the value currently in the color picker to set the max value. Note that every time you pick a color from the compositor window, you need to hit use color picker to apply the new value." Nicolas. _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
