remotion-dev/remotion · error · Error

Failed to acquire 2D context for color parsing

Error message

Failed to acquire 2D context for color parsing

What it means

Thrown in setup() of the halftone-linear-gradient effect when a freshly created 1x1 helper canvas fails to return a 2D context via getContext('2d', {willReadFrequently: true}). The effect uses this throwaway canvas only to parse CSS color strings into RGBA pixels that it uploads as the gradient stop colors. A null 2D context on a brand-new canvas is essentially impossible in a normal browser and signals a broken canvas implementation in the rendering environment.

Source

Thrown at packages/effects/src/halftone-linear-gradient.ts:497

		const texture = gl.createTexture();
		if (!texture) {
			throw new Error('Failed to create WebGL texture');
		}

		gl.bindTexture(gl.TEXTURE_2D, texture);
		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
		gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
		gl.bindTexture(gl.TEXTURE_2D, null);

		const colorCanvas = document.createElement('canvas');
		colorCanvas.width = 1;
		colorCanvas.height = 1;
		const colorCtx = colorCanvas.getContext('2d', {willReadFrequently: true});
		if (!colorCtx) {
			throw new Error('Failed to acquire 2D context for color parsing');
		}

		return {
			gl,
			program,
			vao,
			vbo,
			texture,
			uSource: gl.getUniformLocation(program, 'uSource'),
			uResolution: gl.getUniformLocation(program, 'uResolution'),
			uFirstStopDotSize: gl.getUniformLocation(program, 'uFirstStopDotSize'),
			uSecondStopDotSize: gl.getUniformLocation(program, 'uSecondStopDotSize'),
			uFirstStopPosition: gl.getUniformLocation(program, 'uFirstStopPosition'),
			uSecondStopPosition: gl.getUniformLocation(
				program,
				'uSecondStopPosition',
			),
			uGridSize: gl.getUniformLocation(program, 'uGridSize'),

View on GitHub (pinned to 78fe4bb3fd)

Solutions

1. Do not disable 2D canvas in the render browser — remove flags like --disable-2d-canvas from the Chromium launch arguments.
2. Use the Remotion-bundled headless shell, which ships with both 2D and WebGL canvas support enabled.
3. If the environment genuinely lacks 2D canvas, render on a different host.

// Confirm the environment can produce a 2D context before relying on effects that parse colors this way.
function environmentSupports2dCanvas(): boolean {
  const c = document.createElement('canvas');
  c.width = 1; c.height = 1;
  return c.getContext('2d', { willReadFrequently: true }) !== null;
}

try {
  // ...use halftoneLinearGradient()
} catch (e) {
  if (e instanceof Error && /Failed to acquire 2D context for color parsing/.test(e.message)) {
    // the render browser has 2D canvas disabled; switch to a properly configured browser
  } else throw e;
}

When it happens

Trigger: Running in a JS environment where CanvasRenderingContext2D is unavailable (a stripped-down headless shell, a non-browser runtime pretending to be one, or a Chromium build with 2D canvas disabled via command-line flags).

Common situations: Custom headless Chromium launched with --disable-2d-canvas or similar; an exotic embedder that provides WebGL2 but not 2D canvas; a broken Chromium for Testing build.

Related errors

• Failed to acquire 2D context for color parsing
• Halftone linear gradient program link failed: ${log ?? '(no
• Failed to create WebGL vertex array
• Failed to create WebGL shader
• Failed to create WebGL shader

AI-assisted analysis of remotion-dev/remotion@78fe4bb3fd (2026-08-12). Data as JSON: /api/errors/4d3b1b12c094de9e. Report an issue: GitHub.