'SKVideoNode with color blend using SKEffectNode crashes
I need to blend a color to the video as it done with textures in SKSpriteNode. The video has transparency (HEVC), you can download it here. Doc says that a video can be color-blended and I'm writing the correct code, but it crashes.
Quote:
A video node cannot be colorized. However, it can be added as a child of a SKEffectNode to add Core Image filters for color treatments and other effects.
The code I use:
let videoEffect = SKEffectNode()
videoEffect.name = "videoEffect"
videoEffect.filter = CIFilter(name: "CIColorBlendMode")
let colorImg = CIImage(color: CIColor(color: .red))
videoEffect.filter?.setValue(colorImg, forKey: "inputBackgroundImage")
videoEffect.shouldEnableEffects = true
addChild(videoEffect)
let videoNode = SKVideoNode(fileNamed: "puppets_with_alpha_hevc.mov")
videoNode.name = "video"
videoNode.zPosition = ZPosition.aiBot - 0.5
videoEffect.addChild(videoNode)
Running on a simulator iOS 15.2, getting crash and this output:
-[MTLTextureDescriptorInternal validateWithDevice:]:1325: failed assertion `Texture Descriptor Validation MTLTextureDescriptor has width of zero. MTLTextureDescriptor has height of zero.
May be the filter setup is incorrect? Well, just comment out the filter, like this:
//videoEffect.filter = CIFilter(name: "CIColorBlendMode")
//let colorImg = CIImage(color: CIColor(color: .red))
//videoEffect.filter?.setValue(colorImg, forKey: "inputBackgroundImage")
Now we have just an Effect Node without effects. This should work. But...
-[MTLDebugRenderCommandEncoder validateCommonDrawErrors:]:5252: failed assertion `Draw Errors Validation Fragment Function(FastSingle_FragFunc): missing sampler binding at index 0 for u_texture_sampler[0].
Sources
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