# Processing

**URL:** https://discourse.processing.org/c/processing/6.md?no_subcategories=false&page=10

[Latest](https://discourse.processing.org/latest.md) · [Categories](https://discourse.processing.org/categories.md) · [Tags](https://discourse.processing.org/tags.md)

**Page:** 11

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## [Beginner help -- zoom and pan -- drawing tool](https://discourse.processing.org/t/beginner-help-zoom-and-pan-drawing-tool/46302)

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**Author:** [@marlss7](https://discourse.processing.org/u/marlss7)\
**Replies:** 3\
**Last updated:** [April 30, 2025, 8:00pm UTC](https://discourse.processing.org/t/beginner-help-zoom-and-pan-drawing-tool/46302 "2025-04-30T20:00:17Z")

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hello, i am new to processing and have a somewhat basic question. i want this incredibly simple drawing tool where you can toggle a pixel on or off by pressing. HOWEVER, since the pixels are then so small, i want to have…

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## [Trouble in downloading the Geomerative library — Processing](https://discourse.processing.org/t/trouble-in-downloading-the-geomerative-library-processing/46287)

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**Author:** [@halleyscomet](https://discourse.processing.org/u/halleyscomet)\
**Replies:** 4\
**Last updated:** [April 28, 2025, 5:49pm UTC](https://discourse.processing.org/t/trouble-in-downloading-the-geomerative-library-processing/46287 "2025-04-28T17:49:12Z")

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Hello, I’m new to Processing, and I have to use the Geomerative library for a project using SVG and a plotter. However, I can’t find the Geomerative library in the “add libraries” window of Processing. I also tried to a…

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## [Issue with resizing image](https://discourse.processing.org/t/issue-with-resizing-image/46271)

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**Author:** [@IRIGIMA](https://discourse.processing.org/u/IRIGIMA)\
**Replies:** 12\
**Last updated:** [April 28, 2025, 7:33am UTC](https://discourse.processing.org/t/issue-with-resizing-image/46271 "2025-04-28T07:33:18Z")

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Require urgent help! What am I doing wrong?? Maths is correct, but… Overview: To display a source image (example 15000 X 5000 PX) on 1920 X 1080 destination output. (keeping the correct aspect for destination) Due to…

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## [How do I make a button class call a function from inside or outside class](https://discourse.processing.org/t/how-do-i-make-a-button-class-call-a-function-from-inside-or-outside-class/46268)

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**Author:** [@ggomez](https://discourse.processing.org/u/ggomez)\
**Replies:** 2\
**Last updated:** [April 24, 2025, 5:53am UTC](https://discourse.processing.org/t/how-do-i-make-a-button-class-call-a-function-from-inside-or-outside-class/46268 "2025-04-24T05:53:53Z")

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So I think my question is very simple but I lack the vocabulary to google it myself effectively, thing is, I’m creating a custom Button class and I need to call custom code when instantiating it. I tried using mehod() bu…

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## [How to use swing components with Processing (3.3.6)](https://discourse.processing.org/t/how-to-use-swing-components-with-processing-3-3-6/36219)

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**Author:** [@NumericPrime](https://discourse.processing.org/u/NumericPrime)\
**Replies:** 8\
**Last updated:** [April 23, 2025, 9:00am UTC](https://discourse.processing.org/t/how-to-use-swing-components-with-processing-3-3-6/36219 "2025-04-23T09:00:28Z")

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I tried to add swing components to my projects for a long time as you can easily construct user interfaces with swing and use them to manipulate my program. After a long time I managed to combine the two. Here is a examp…

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## [OBJ: Disabling MTL and Applying Custom Colors](https://discourse.processing.org/t/obj-disabling-mtl-and-applying-custom-colors/46265)

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**Author:** [@Chrisir](https://discourse.processing.org/u/Chrisir)\
**Replies:** 12\
**Last updated:** [April 21, 2025, 9:08am UTC](https://discourse.processing.org/t/obj-disabling-mtl-and-applying-custom-colors/46265 "2025-04-21T09:08:45Z")

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I have a similar problem, mtl looks like this: # Blender MTL File: 'Aa.blend' # Material Count: 1 newmtl Material.001 Ns 225.000000 Ka 0.680556 0.680556 0.680556 Kd 0.800000 0.046634 0.034524 Ks 0.527778 0.527778 0.527…

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## [Load a mlt and obj](https://discourse.processing.org/t/load-a-mlt-and-obj/5222)

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**Author:** [@MarsatAE](https://discourse.processing.org/u/MarsatAE)\
**Replies:** 9\
**Last updated:** [November 29, 2018, 9:57am UTC](https://discourse.processing.org/t/load-a-mlt-and-obj/5222 "2018-11-29T09:57:46Z")

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Hi My name is Vincent and i’m trying to build a software that can simply display a 3D that i make with Cinema4D. The problem i have is: i cannot load the Mtl with my obj. Here is the code : import java.io.FileOutput…

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## [Processing 4.4.1 install options](https://discourse.processing.org/t/processing-4-4-1-install-options/46247)

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**Author:** [@glv](https://discourse.processing.org/u/glv)\
**Replies:** 0\
**Last updated:** [April 19, 2025, 3:51pm UTC](https://discourse.processing.org/t/processing-4-4-1-install-options/46247 "2025-04-19T15:51:08Z")

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Hello folks! I recently downloaded Processing 4.4.1 for Windows and installing in a W10 environment. The default on the website is an msi file: processing-4.4.1-windows-x64.msi I tried this but was not able to instal…

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## [Processing 4.4 and Linux](https://discourse.processing.org/t/processing-4-4-and-linux/46238)

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**Author:** [@Jean-no](https://discourse.processing.org/u/Jean-no)\
**Replies:** 3\
**Last updated:** [April 18, 2025, 4:26pm UTC](https://discourse.processing.org/t/processing-4-4-and-linux/46238 "2025-04-18T16:26:21Z")

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Hi everyone. Processing can now be installed through snap on linux. It works well, at first glance, but there seem to be a “sandbox” problem (the command snap connect processing:removable-media answers snap "processing…

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## [Use numbers at the beginning of the project name](https://discourse.processing.org/t/use-numbers-at-the-beginning-of-the-project-name/46228)

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**Author:** [@scuy](https://discourse.processing.org/u/scuy)\
**Replies:** 2\
**Last updated:** [April 16, 2025, 12:27pm UTC](https://discourse.processing.org/t/use-numbers-at-the-beginning-of-the-project-name/46228 "2025-04-16T12:27:11Z")

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When I use a number at the beginning of the project name, “sketch\_” is automatically added to the beginning of the saved name. Is this by design? Is there a setting to avoid this?

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## [The error "Could not load movie file Fish.mp4" occurs](https://discourse.processing.org/t/the-error-could-not-load-movie-file-fish-mp4-occurs/46169)

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**Author:** [@Morphine](https://discourse.processing.org/u/Morphine)\
**Replies:** 5\
**Last updated:** [April 15, 2025, 5:59pm UTC](https://discourse.processing.org/t/the-error-could-not-load-movie-file-fish-mp4-occurs/46169 "2025-04-15T17:59:56Z")

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The error “Could not load movie file Fish.mp4” occurs. The “Fish.mp4” file is played in other video players, this file is located in the same folder as the sketch.

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## [GPU parallel processing with APARAPI](https://discourse.processing.org/t/gpu-parallel-processing-with-aparapi/46223)

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**Author:** [@williamfraser](https://discourse.processing.org/u/williamfraser)\
**Replies:** 0\
**Last updated:** [April 15, 2025, 3:48pm UTC](https://discourse.processing.org/t/gpu-parallel-processing-with-aparapi/46223 "2025-04-15T15:48:18Z")

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Good day all. I have written a particle simulator and would like to try improving speed using parallel processing on a GPU. APARAPI is something used to run Java on GPU, but will it work with Processing? I have no exp…

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## [Video library DLLs not found in Windows 10](https://discourse.processing.org/t/video-library-dlls-not-found-in-windows-10/46213)

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**Author:** [@nixiebunny](https://discourse.processing.org/u/nixiebunny)\
**Replies:** 0\
**Last updated:** [April 14, 2025, 1:33am UTC](https://discourse.processing.org/t/video-library-dlls-not-found-in-windows-10/46213 "2025-04-14T01:33:16Z")

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I have just installed Processing 4.3.4 x86-64 on my Windows 10 i7 laptop. It is installed at \\Users\\David\\Processing4.3.4\\processing.exe I installed the Video library for Processing 4 from the Manage Libraries dialog. …

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## [Can I use Processing to separately control 3 videos on 3 monitors?](https://discourse.processing.org/t/can-i-use-processing-to-separately-control-3-videos-on-3-monitors/46210)

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**Author:** [@Flustered](https://discourse.processing.org/u/Flustered)\
**Replies:** 1\
**Last updated:** [April 14, 2025, 1:05am UTC](https://discourse.processing.org/t/can-i-use-processing-to-separately-control-3-videos-on-3-monitors/46210 "2025-04-14T01:05:11Z")

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Hi.. I have been waiting for an excuse to use Processing for AGES!!! We need to have 3 separate videos playing on 3 separate monitors with the videos stopping and starting by code.. I know you can play video in a sket…

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## [Output to multiple displays](https://discourse.processing.org/t/output-to-multiple-displays/43852)

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**Author:** [@jstarbell](https://discourse.processing.org/u/jstarbell)\
**Replies:** 3\
**Last updated:** [April 14, 2025, 1:00am UTC](https://discourse.processing.org/t/output-to-multiple-displays/43852 "2025-04-14T01:00:29Z")

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Hi, first post in a decade! I would like to send differing output to two different displays, each in fullScreen mode. I’m running Processing 4.2 For example, on a Windows computer with a monitor and a projector as disp…

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## [Tried deleting a file in the Processing app, and it ended up deleting all my files in the downloads folder. Is there anything I can do?](https://discourse.processing.org/t/tried-deleting-a-file-in-the-processing-app-and-it-ended-up-deleting-all-my-files-in-the-downloads-folder-is-there-anything-i-can-do/46196)

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**Author:** [@grumpycatjwj](https://discourse.processing.org/u/grumpycatjwj)\
**Replies:** 1\
**Last updated:** [April 11, 2025, 1:04pm UTC](https://discourse.processing.org/t/tried-deleting-a-file-in-the-processing-app-and-it-ended-up-deleting-all-my-files-in-the-downloads-folder-is-there-anything-i-can-do/46196 "2025-04-11T13:04:40Z")

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I asked a friend who had this happen to them, and they said that the files should show in my trash folder, however nothing is there either. Is there anyway to get my files back?

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## [Processing runs slow on Linux](https://discourse.processing.org/t/processing-runs-slow-on-linux/46187)

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**Author:** [@Yonatan](https://discourse.processing.org/u/Yonatan)\
**Replies:** 3\
**Last updated:** [April 11, 2025, 12:58pm UTC](https://discourse.processing.org/t/processing-runs-slow-on-linux/46187 "2025-04-11T12:58:13Z")

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I am using processing to make a game and I used the same laptop to run the game and on windows when I run the code it runs smoothly with no problems but when I use fedora or debian Linux it runs about 4 times slower Lap…

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## [\[SOLVED\] Minim library FFT help](https://discourse.processing.org/t/solved-minim-library-fft-help/46184)

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**Author:** [@esc746](https://discourse.processing.org/u/esc746)\
**Replies:** 0\
**Last updated:** [April 9, 2025, 4:34pm UTC](https://discourse.processing.org/t/solved-minim-library-fft-help/46184 "2025-04-09T16:34:39Z")

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I am using Minim to display the spectrum of the total output of my sketch. The example sketch Minim \> Analysis \> SoundSpectrum has this core algorithm: AudioPlayer sound = minim.loadFile("sound.mp3", 1024); FFT fft = ne…

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## [Flocking simulation is erratic and choppy](https://discourse.processing.org/t/flocking-simulation-is-erratic-and-choppy/45958)

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**Author:** [@David1](https://discourse.processing.org/u/David1)\
**Replies:** 8\
**Last updated:** [March 27, 2025, 3:26pm UTC](https://discourse.processing.org/t/flocking-simulation-is-erratic-and-choppy/45958 "2025-03-27T15:26:40Z")

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Hi all, I appreciate your time in reading this question. I’m fairly new to Processing and have finally made it into the world of vectors. It’s been funs so far, but I’m having trouble implementing the vectors in a 3D fl…

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## [Issue rendering video/how to render video on processing](https://discourse.processing.org/t/issue-rendering-video-how-to-render-video-on-processing/6667)

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**Author:** [@ra0000mona94](https://discourse.processing.org/u/ra0000mona94)\
**Replies:** 2\
**Last updated:** [December 18, 2018, 9:14pm UTC](https://discourse.processing.org/t/issue-rendering-video-how-to-render-video-on-processing/6667 "2018-12-18T21:14:27Z")

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I’m extremely new to this and have made a design using a tutorial. My code runs smoothly until I enter: saveFrame(“output/frames\_####.png”); when I enter this, my video does not run, instead there is a blank screen. ple…

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## ["Video for Processing 4" - Video is flickering, possible causes?](https://discourse.processing.org/t/video-for-processing-4-video-is-flickering-possible-causes/42703)

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**Author:** [@olliebown](https://discourse.processing.org/u/olliebown)\
**Replies:** 8\
**Last updated:** [September 19, 2023, 11:21am UTC](https://discourse.processing.org/t/video-for-processing-4-video-is-flickering-possible-causes/42703 "2023-09-19T11:21:37Z")

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Are there any experts on the “Video for Processing 4” library who might be able to explain possible causes of undesirable flickering and freezing behaviour? (Processing 4, Mac OS 13\*). At present I can’t provide a clean …

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## [When I render this code, it gives me 2 second video. but it have to give 6 secs](https://discourse.processing.org/t/when-i-render-this-code-it-gives-me-2-second-video-but-it-have-to-give-6-secs/21773)

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**Author:** [@yhlaskerimov](https://discourse.processing.org/u/yhlaskerimov)\
**Replies:** 8\
**Last updated:** [April 4, 2025, 3:19pm UTC](https://discourse.processing.org/t/when-i-render-this-code-it-gives-me-2-second-video-but-it-have-to-give-6-secs/21773 "2025-04-04T15:19:00Z")

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import processing.video.\*; import com.hamoid.\*; VideoExport videoExport; int cellSize = 20; int cols, rows; PShape asuda\[\] = new PShape\[5\]; Movie movie; void setup() { frameRate(60); size(1920, 1080); cols = wid…

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## [Pyllotaxis algorythm masking. Brand identity dynamic logo](https://discourse.processing.org/t/pyllotaxis-algorythm-masking-brand-identity-dynamic-logo/46149)

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**Author:** [@maumanto16](https://discourse.processing.org/u/maumanto16)\
**Replies:** 1\
**Last updated:** [April 4, 2025, 6:02am UTC](https://discourse.processing.org/t/pyllotaxis-algorythm-masking-brand-identity-dynamic-logo/46149 "2025-04-04T06:02:23Z")

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Hello everybody. I am a designer and i am working on a brand identity using processing. I created a pyllotaxis algorythm distributing small ellipses and used it as the main pattern of the system. I’d like to be able to m…

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## [Help With Video Code Crashing (ram build up?)](https://discourse.processing.org/t/help-with-video-code-crashing-ram-build-up/9688)

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**Author:** [@EvanA](https://discourse.processing.org/u/EvanA)\
**Replies:** 8\
**Last updated:** [March 27, 2019, 7:26pm UTC](https://discourse.processing.org/t/help-with-video-code-crashing-ram-build-up/9688 "2019-03-27T19:26:59Z")

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Hello, I’m pretty new to processing and am making this code for a creative project. Basically the code picks a random spot in a video file and plays for ten seconds. After the ten seconds it picks a new random video fil…

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## [Video loop() choppy](https://discourse.processing.org/t/video-loop-choppy/45971)

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**Author:** [@esc746](https://discourse.processing.org/u/esc746)\
**Replies:** 6\
**Last updated:** [April 3, 2025, 6:30pm UTC](https://discourse.processing.org/t/video-loop-choppy/45971 "2025-04-03T18:30:10Z")

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I am using standard code from the example page to loop a video file (720p30 AVC). The initial buffering is quite long. Worse yet, the looping is far from smooth, with pauses up to two seconds (!) at the transition. The …

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## [Processing takes a while to open files](https://discourse.processing.org/t/processing-takes-a-while-to-open-files/45530)

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**Author:** [@ripolas](https://discourse.processing.org/u/ripolas)\
**Replies:** 5\
**Last updated:** [April 2, 2025, 3:27pm UTC](https://discourse.processing.org/t/processing-takes-a-while-to-open-files/45530 "2025-04-02T15:27:05Z")

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When i open processing and then open a file Processing freezes for about 1 min. This happens every time i want to open a file with Processing. It has gotten really annoying. Does anyone know a fix? I’m using processing 4…

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## [Running Processing in Headless Mode (On a Mac)](https://discourse.processing.org/t/running-processing-in-headless-mode-on-a-mac/3457)

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**Author:** [@rsomani95](https://discourse.processing.org/u/rsomani95)\
**Replies:** 9\
**Last updated:** [March 31, 2025, 6:03am UTC](https://discourse.processing.org/t/running-processing-in-headless-mode-on-a-mac/3457 "2025-03-31T06:03:39Z")

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I want to run Processing sketches from the terminal, and not have a display window show up. Currently, I can run processing from the terminal using the processing-java command and save my files where I’d like to. Howev…

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## [Error message with Syphon lib](https://discourse.processing.org/t/error-message-with-syphon-lib/46056)

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**Author:** [@vj\_dobermann](https://discourse.processing.org/u/vj_dobermann)\
**Replies:** 6\
**Last updated:** [March 30, 2025, 4:55am UTC](https://discourse.processing.org/t/error-message-with-syphon-lib/46056 "2025-03-30T04:55:28Z")

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Hello everybody, I’m beginner on Processing, I juste need it for a specific animation that will be use for an event. When the code is executed, this error message occurs : Syphon 4.0 by Andres Colubri, Tom Butterworth…

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## [Youtube livestream help](https://discourse.processing.org/t/youtube-livestream-help/46041)

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**Author:** [@jetjaguar](https://discourse.processing.org/u/jetjaguar)\
**Replies:** 7\
**Last updated:** [March 29, 2025, 4:06pm UTC](https://discourse.processing.org/t/youtube-livestream-help/46041 "2025-03-29T16:06:08Z")

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Hello everyone! I didn’t think this would be possible at all, but it works, for a few seconds… I would like to play a youtube livestream within processing. I’ve installed the vlcjvideo library, as well as VideoLAN. The…

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## [Processing + Mac ARM + Syphon library](https://discourse.processing.org/t/processing-mac-arm-syphon-library/45987)

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**Author:** [@yaniki](https://discourse.processing.org/u/yaniki)\
**Replies:** 0\
**Last updated:** [March 13, 2025, 8:33pm UTC](https://discourse.processing.org/t/processing-mac-arm-syphon-library/45987 "2025-03-13T20:33:39Z")

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Dear Friends Do we currently have any version of Syphon that works on Macs with ARM processors (I mean native work, without running Processing in Rosetta mode, etc.). Thank you in advance for all your comments and info…

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