Using webcam on Windows crashes regl about hydra HOT 7 CLOSED

@echophon how interesting. What is the very first error that appears before all the regl errors?

Do both of these examples work with your camera+screen configuration?: https://webrtc.github.io/samples/src/content/getusermedia/gum/ https://webrtc.github.io/samples/src/content/getusermedia/canvas/

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I only see a warning once, then all these errors. The warning is:

WebGL: CONTEXT_LOST_WEBGL: loseContext: context lost

If I reevaluate the code once this occurs I see this in the canvas error handling area:

Failed to execute 'shaderSource' on 'WebGLRenderingContext': parameter 1 is not of type 'WebGLShader'.

I was able to reproduce this on the 60Hz screen, so it might not be screen related after all.

I can run both of those WebRTC samples and others (great resource) for extended periods at a time. I can also run them at the same time as Hydra and they keep working if in seperate windows. They do however blank to white when this crash occurs, but as soon as I give their window focus again they start working again. Hmmm....

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@echophon any updates on this?

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@ojack Applied the latest graphic drivers from NVIDIA, but still running into this. Additionally, I tried in atom-hydra & with a different webcam. In both cases, I was able to capture a bit more of the crash data into the console. Looks like a memory leak, but I found this reference on regl regl-project/regl#430 which points to buffer allocation.

Webcam 1
WebGL: CONTEXT_LOST_WEBGL: loseContext: context lost
index.html:1 [.Offscreen-For-WebGL-0000020DD7806550]GL ERROR :GL_OUT_OF_MEMORY : BackFramebuffer::Destroy: <- error from previous GL command
C:\Users\echophon.atom\packages\atom-hydra\node_modules\regl\dist\regl.js:48 Error: (regl) context lost
at Function.raise (C:\Users\echophon.atom\packages\atom-hydra\node_modules\regl\dist\regl.js:47)
at Object.REGLCommand [as draw] (C:\Users\echophon.atom\packages\atom-hydra\node_modules\regl\dist\regl.js:9403)
at passes.forEach (C:\Users\echophon.atom\packages\atom-hydra\node_modules\hydra-synth\src\output.js:158)
at Array.forEach ()
at Output.tick (C:\Users\echophon.atom\packages\atom-hydra\node_modules\hydra-synth\src\output.js:158)
at HydraSynth.tick (C:\Users\echophon.atom\packages\atom-hydra\node_modules\hydra-synth\index.js:301)
at Engine. (main.js:216)
at emitOne (events.js:116)
at Engine.emit (events.js:211)
at Engine.tick (C:\Users\echophon.atom\packages\atom-hydra\node_modules\raf-loop\index.js:42)

Webcam 2
[.Offscreen-For-WebGL-0000021B339D9170]GL ERROR :GL_OUT_OF_MEMORY : glFramebufferTexture2D: <- error from previous GL command
index.html:1 [.Offscreen-For-WebGL-0000021B339D9170]GL ERROR :GL_OUT_OF_MEMORY : glFramebufferTexture2D:
index.html:1 WebGL: CONTEXT_LOST_WEBGL: loseContext: context lost
index.html:1 [.Offscreen-For-WebGL-0000021B339D9170]GL ERROR :GL_OUT_OF_MEMORY : BackFramebuffer::Destroy: <- error from previous GL command
C:\Users\echophon.atom\packages\atom-hydra\node_modules\regl\dist\regl.js:48 Error: (regl) context lost
at Function.raise (C:\Users\echophon.atom\packages\atom-hydra\node_modules\regl\dist\regl.js:47)
at Object.REGLCommand [as draw] (C:\Users\echophon.atom\packages\atom-hydra\node_modules\regl\dist\regl.js:9403)
at passes.forEach (C:\Users\echophon.atom\packages\atom-hydra\node_modules\hydra-synth\src\output.js:158)
at Array.forEach ()
at Output.tick (C:\Users\echophon.atom\packages\atom-hydra\node_modules\hydra-synth\src\output.js:158)
at HydraSynth.tick (C:\Users\echophon.atom\packages\atom-hydra\node_modules\hydra-synth\index.js:301)
at Engine. (main.js:216)
at emitOne (events.js:116)
at Engine.emit (events.js:211)
at Engine.tick (C:\Users\echophon.atom\packages\atom-hydra\node_modules\raf-loop\index.js:42)

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@echophon i found an error and updated hydra-synth, the browser, and atom verion....any difference?

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I think this is fixed! My initial results at hydra-editor-v1.glitch.me are looking good. I can connect multiple USB webcams, record & playback a video (vidRecorder was also crashing for me previously), and unplug webcams without an error. In this last case, they just display the last buffer received. I'll try with atom next.

I did notice that one of the example sketches (Will's Lines) throws an error "o0.scale" is not a function, so there may be a slight backwards compatibility issue. Simple enough to fix it by updating to "src(o0).scale"

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yay! i am going to close the issue then!

thats interesting because i dont think o0.scale would have ever worked ... or maybe im forgetting something

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