- Cin - Cinelerra-GG Mailing Lists

New March 31 AppImages
by Phyllis Smith 31 Mar '25

31 Mar '25

So that the Blend Algebra and Blend Program icons would be visible, I updated the AppImages. A few fixes are in too as noted (hopefully technically correct) in the Release Notes shown last here. Plus, I did put Andrea's experimental/testing of Gimp-like overlay algorithms for Addition, Subtraction, Divide, and Multiply using the Blend Algebra plugin at: https:/ cinelerra-gg.org/download/testing/BlendPluginExamples/gimp_.zip . Removed GIT manual reference to Overlays but a little late. *GIT for Cinelerra-GG has the following changes from 03/01/2025-03/31/2025* *Blend Algebra and Blend Program* modifications include the following: - Icons for Cinfinity and Cinfinity2 have been created by *IgorB*. - Code changes by the author, *Georgy*, to both plugins: 1) Buttons =>project, userlib, syslib will also display the target dir when the function name is blank. 2) Refresh will now immediately recompile that function (if any) which is under the timeline cursor when source is newer than shared object. This does not affect the other functions which are not under the cursor and they will still be recompiled on first access. 3) Added “output track” of Blend Algebra which was missing in copy/interpolate functions. 4) Improved robustness of code to prevent race conditions between threads of different windows when closing or resizing dialog menus. *Screencapture* for NetBSD failure has been fixed by adding fallback in case shm capture does not work by *Andrew-R*. This fix may be applicable to other Operating Systems.

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Gimp's blend Vs CinGG's blend
by Andrea paz 27 Mar '25

27 Mar '25

I wanted to try using Blend Algebra to recreate Gimp's blend types inside CinGG. I couldn't because I don't really understand the formulas used by Gimp, or rather, what I understand less are the formulas used by CinGG. I understand that these are pre-multiplied while Gimp's are normal (“straight”). But even without taking this into account, I don't really understand how to compare the formulas (https://docs.gimp.org/3.0/en/gimp-concepts-layer-modes-legacy.html) For example, for the “Multiply” blend we have two different formulas, even though the manual says that the CinGG formula is the same as the Gimp formula: Gimp E = 1/255*(M*I) where “M” (foreground), if I understand correctly, corresponds to our “D” and “I” (background) corresponds to our “S” so it could be written: E = 1/255*(D*S) Instead, CinGG's formula is: [(Sa+Da-Sa*Da), Sc*(1-Da)+Dc*(1-Sa)+Sc*Dc] I cannot compare the two formulas, there is one too many Sc*(1-Da) and one too many Dc*(1-Sa), and a 1/255 is missing. Note: The presence of the parentheses like (1-Sa) is what makes me suspect that CinGG's formulas are “pre-multiplied” (https://en.wikipedia.org/wiki/Alpha_compositing#Straight_versus_premultipli….) There are three types of blends whose formulas differ (and which I wanted to implement via Blend Algebra): (Normal); Addition; Subtract and Divide. Then there are Gimp blends that CinGG doesn't have, but they don't seem interesting to me. PS: I tried to look for the formulas used by CinCV but I don't know where to find them; do they exist anywhere?

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Attempt at fixing screencapture under NetBSD
by Andrew Randrianasulu 21 Mar '25

21 Mar '25

Tried to record desktop, found out screencapture does not work :( It seems even ffmpeg fall back to non-shm capture (slower) under NetBSD, so I tried to to change logic in guicast/bccapture.C so if compiled on netBSD it hard disable shm for capture (playback is fine) Please try on Linux and other systems ... Pay attention to screencapture slowdowns!

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First screencapture under NetBSD!
by Andrew Randrianasulu 17 Mar '25

17 Mar '25

https://cloud.mail.ru/public/DQkK/kpDhJiyY3 9 Mbytes Testing experimental audio support fro qemu-system-ppc (running NetBSD/macppc) under NetBSD/amd64 and of course cinlerra-gg! (with my screencapture fixes) Sadly aiomixer a bit hard to get right on first try, so sound level is LOW. Captured using OSS support via /dev/audio1

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Strange effects with zooming
by Stefan de Konink 14 Mar '25

14 Mar '25

With the recent git version. Did anyone observe strange artifacts on the wave forms when zooming and scrolling too? Like the offset of the wave form moves up or down? -- Stefan

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Blend Algebra and Program icons
by Igor BEGHETTO 04 Mar '25

04 Mar '25

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Blend Algebra and Program icons
by Igor BEGHETTO 03 Mar '25

03 Mar '25

If you want, I created the icons for the new BlendAlgebra/Progam plugins. If Georgy think they are good,... I put them here to use in Cinelerra-GG. In the compressed file there are ALL of them (square and circle). I put here the two square icons as preview. Thank you. IgorBeg blendalgebra.png blendprogram.png

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New AppImages with major new Blend plugins ready
by Phyllis Smith 01 Mar '25

01 Mar '25

Newest AppImages at: https://cinelerra-gg.org/download/images/ with Andrey's packages up to date at: https://github.com/einhander/cin-gg-packages/releases Exciting new Blend Algebra and Blend Program plugins for the blending enthusiasts by Georgy are now available to all - with Georgy's Alt-h easy access from inside CinGG to read the associated document. And examples, README, and related files at: https://cinelerra-gg.org/download/testing/BlendPluginExamples/ You will definitely have to read the documentation to figure out usage but you can get started by looking at the examples. ************************ New in the releasenotes.pdf are below GIT for Cinelerra-GG has the following changes from 01/01/2025-02/28/2025 A Major Enhancement has been developed by Georgy (sge) to provide usage versatility in the blending features. There are 2 new plugins – BlendAlgebra and BlendProgram which he has documented and Andrea has “latexed” for the Manual. For examples and details on how to adjust blending to your specific requirements, download the files at: https://cinelerra-gg.org/download/testing/BlendPluginExamples/ or refer to the PDF or HTML manual Blend Algebra and Blend Program section. Andrea discovered that AppImages no longer work on the latest version of Arch. Cause is glibc-2.4.1 which had a security flaw fixed and will eventually be in the other latest O/S versions updates. Andrew-R generated a fix to add noexecstack to configuration of the Plugins. Updated year date from 2024 to 2025 (cinelerra/versioninfo.h). Added comment to 28 hardware encoding/render formats to indicate the requirement of specific GPU hardware encoding capability as well as software implementation. Flac has been updated from 1.4.3 to 1.5.0.

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New BlendAlgebra plugin install fail on Termux.
by Andrew Randrianasulu 28 Feb '25

28 Feb '25

So,I moved to compile git of cinelerra-gg as promised and run into this: BlendAlgebraStart:10:10: fatal error: 'values.h' file not found and few more error lines like this on make install for shared libs termux build (blds/termux_dyn.bld). For what exactly values.h is used? ;)

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noexecstack for plugins
by Andrew Randrianasulu 28 Feb '25

28 Feb '25

Does this patch fix Appimage startup in glibc 2.41 Arch ? For testing apply patch, build cingg appimage on usual system, try to load on Arch ? ref: https://www.cinelerra-gg.org/bugtracker/view.php?id=670#c5765

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