remotion-dev/remotion · critical · Error

Glow program link failed: ${log ?? '(no log)'}

Error message

Glow program link failed: ${log ?? '(no log)'}

What it means

Thrown when gl.linkProgram fails for a glow program, with the GPU info log appended. Means the compiled vertex/fragment pair are individually valid but incompatible (varying in/out mismatch, undeclared uniforms, qualifier conflict), pointing at a bug in the shipped glow shader pair.

Source

Thrown at packages/effects/src/glow/glow-runtime.ts:87

};

const linkProgram = (
	gl: WebGL2RenderingContext,
	vs: WebGLShader,
	fs: WebGLShader,
): WebGLProgram => {
	const program = gl.createProgram();
	if (!program) {
		throw new Error('Failed to create WebGL program');
	}

	gl.attachShader(program, vs);
	gl.attachShader(program, fs);
	gl.linkProgram(program);
	if (!gl.getProgramParameter(program, gl.LINK_STATUS)) {
		const log = gl.getProgramInfoLog(program);
		gl.deleteProgram(program);
		throw new Error(`Glow program link failed: ${log ?? '(no log)'}`);
	}

	return program;
};

const createProgram = (
	gl: WebGL2RenderingContext,
	vertexSource: string,
	fragmentSource: string,
): WebGLProgram => {
	const vs = compileShader(gl, gl.VERTEX_SHADER, vertexSource);
	const fs = compileShader(gl, gl.FRAGMENT_SHADER, fragmentSource);
	const program = linkProgram(gl, vs, fs);
	gl.deleteShader(vs);
	gl.deleteShader(fs);
	return program;
};

View on GitHub (pinned to 78fe4bb3fd)

Solutions

1. Inspect the appended info log for the mismatched symbol.
2. Restore the shipped shader sources from a clean checkout.
3. File a Remotion bug with the log and environment details.

try {
  effect = glow(params);
} catch (err) {
  if (/program link failed/i.test(String(err))) {
    console.error('Glow link failure; info log:', String(err));
  }
  throw err;
}

When it happens

Trigger: Editing GLOW_VS or a GLOW_*_FS and forgetting to mirror an in/out declaration; tampered shader source; driver rejecting a qualifier at link time.

Common situations: Local shader development; partial GLSL ES 300 driver support.

Related errors

• Flannel program link failed: ${log ?? '(no log)'}
• Glow shader compile failed: ${log ?? '(no log)'}
• Program link failed: ${log ?? '(no log)'}
• Burlap program link failed: ${log ?? '(no log)'}
• Failed to create WebGL shader

AI-assisted analysis of remotion-dev/remotion@78fe4bb3fd (2026-08-12). Data as JSON: /api/errors/6143ab9ca185dbd6. Report an issue: GitHub.