{"record":{"id":"4baa8ca40e01f0d5","repo":"remotion-dev/remotion","slug":"progressive-pixelate-shader-compile-failed-log","errorCode":null,"errorMessage":"Progressive pixelate shader compile failed: ${log ?? '(no log)'}","messagePattern":"Progressive pixelate shader compile failed: (.+?)","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/effects/src/progressive-pixelate-runtime.ts","lineNumber":135,"sourceCode":"}\n`;\n\nconst compileShader = (\n\tgl: WebGL2RenderingContext,\n\ttype: number,\n\tsource: string,\n): WebGLShader => {\n\tconst shader = gl.createShader(type);\n\tif (!shader) {\n\t\tthrow new Error('Failed to create WebGL shader');\n\t}\n\n\tgl.shaderSource(shader, source);\n\tgl.compileShader(shader);\n\tif (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {\n\t\tconst log = gl.getShaderInfoLog(shader);\n\t\tgl.deleteShader(shader);\n\t\tthrow new Error(\n\t\t\t`Progressive pixelate shader compile failed: ${log ?? '(no log)'}`,\n\t\t);\n\t}\n\n\treturn shader;\n};\n\nconst linkProgram = (\n\tgl: WebGL2RenderingContext,\n\tvs: WebGLShader,\n\tfs: WebGLShader,\n): WebGLProgram => {\n\tconst program = gl.createProgram();\n\tif (!program) {\n\t\tthrow new Error('Failed to create WebGL program');\n\t}\n\n\tgl.attachShader(program, vs);","sourceCodeStart":117,"sourceCodeEnd":153,"githubUrl":"https://github.com/remotion-dev/remotion/blob/78fe4bb3fdb5a2cd68724393d63cb223db333fa7/packages/effects/src/progressive-pixelate-runtime.ts#L117-L153","documentation":"Thrown by compileShader in progressive-pixelate-runtime.ts when gl.getShaderParameter(shader, gl.COMPILE_STATUS) is false. The progressive-pixelate fragment shader is more complex (log2/exp2/mix/multi-function), so it is more sensitive to driver GLSL quirks than the simple pixelate shader. The driver info log is interpolated into the message.","triggerScenarios":"setupProgressivePixelate compiles the vertex or fragment shader; COMPILE_STATUS is false; the captured info log is appended to the error.","commonSituations":"A driver that supports GLSL ES 3.00 only partially (the shader uses `mix`, `log2`, `exp2`, `fract`, `floor`, `max`, `texture`); a stripped or buggy Chrome for Testing build; very rarely a library regression in the shader source.","solutions":["Read the interpolated info log — it identifies the failing GLSL line and the driver complaint.","Reproduce on stable desktop Chrome; success there means the render environment is the cause.","On Lambda use the bundled Chrome for Testing layer rather than a custom Chromium.","Update or roll back the GPU driver.","If the log shows a genuine GLSL error, file a Remotion issue with the log and version."],"exampleFix":"// before\nsetupProgressivePixelate(canvas); // throws 'Progressive pixelate shader compile failed: ...'\n\n// after — capture the log and renderer for triage\ntry {\n  setupProgressivePixelate(canvas);\n} catch (err) {\n  const gl = canvas.getContext('webgl2');\n  const dbg = gl?.getExtension('WEBGL_debug_renderer_info');\n  console.error((err as Error).message, 'renderer:', dbg && gl?.getParameter(dbg.UNMASKED_RENDERER_WEBGL));\n}","handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"try {\n  setupProgressivePixelate(canvas);\n} catch (err) {\n  const msg = (err as Error).message;\n  if (msg.startsWith('Progressive pixelate shader compile failed')) {\n    const gl = canvas.getContext('webgl2');\n    const dbg = gl?.getExtension('WEBGL_debug_renderer_info');\n    console.error(msg, 'renderer:', dbg && gl?.getParameter(dbg.UNMASKED_RENDERER_WEBGL));\n  }\n  throw err;\n}","preventionTips":["Always capture the interpolated info log for diagnosis.","Reproduce on stable desktop Chrome; success means the render environment is at fault.","Use the bundled Remotion Lambda Chrome layer; avoid custom Chromium.","Keep GPU drivers current; roll back if a recent update broke compilation.","Report genuine GLSL errors to Remotion with the log and version."],"tags":["webgl","glsl","progressive-pixelate","shader","driver","diagnostics"],"backgroundTag":null,"analyzedSha":"78fe4bb3fdb5a2cd68724393d63cb223db333fa7","analyzedAt":"2026-08-12T17:18:50.444Z","schemaVersion":2},"datasetVersion":"2026-08-12T23:17:12.415Z"}