{"record":{"id":"0ade441bcfe42414","repo":"remotion-dev/remotion","slug":"error-in-media-parser-end-of-parsing-of-src-ha","errorCode":null,"errorMessage":"Error in Media Parser: End of parsing of ${src} has been reached, but no tracks have been found ","messagePattern":"Error in Media Parser: End of parsing of (.+?) has been reached, but no tracks have been found ","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"packages/media-parser/src/state/has-tracks-section.ts","lineNumber":44,"sourceCode":"\t\t\tdoneWithTracks = true;\n\t\t},\n\t\taddTrack: (track: MediaParserTrack) => {\n\t\t\ttracks.push(track);\n\t\t},\n\t\tgetTracks: () => {\n\t\t\treturn tracks;\n\t\t},\n\t\tensureHasTracksAtEnd: (fields: Options<ParseMediaFields>) => {\n\t\t\tif (canSkipTracksState.canSkipTracks()) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif (!fields.tracks) {\n\t\t\t\treturn;\n\t\t\t}\n\n\t\t\tif (!doneWithTracks) {\n\t\t\t\tthrow new Error(\n\t\t\t\t\t'Error in Media Parser: End of parsing of ' +\n\t\t\t\t\t\tsrc +\n\t\t\t\t\t\t' has been reached, but no tracks have been found ',\n\t\t\t\t);\n\t\t\t}\n\t\t},\n\t};\n};\n\nexport type TracksState = ReturnType<typeof makeTracksSectionState>;\n","sourceCodeStart":26,"sourceCodeEnd":55,"githubUrl":"https://github.com/remotion-dev/remotion/blob/78fe4bb3fdb5a2cd68724393d63cb223db333fa7/packages/media-parser/src/state/has-tracks-section.ts#L26-L55","documentation":"Thrown by ensureHasTracksAtEnd when the parser reached end-of-file while the caller requested tracks (fields.tracks) but no tracks were ever emitted (doneWithTracks stayed false) and the canSkipTracks optimization does not apply. It signals the media was fully consumed without the parser recognizing any track boxes/atoms.","triggerScenarios":"Calling parseMedia with fields including tracks on a file that has no recognizable tracks: a non-media file, a truncated/corrupt file, a container the parser does not fully understand, or a file where the moov/trak boxes are missing or after EOF.","commonSituations":"Pointing parseMedia at a text file, image, or HTML by mistake. A partially downloaded media where the moov atom (mp4) was never fetched. Files with non-standard box layouts. Network truncation when range requests are unsupported.","solutions":["Verify the input is actually a media file in a supported container before requesting tracks.","For mp4 over a network, ensure the moov atom is fetched (faststart/moov-at-front); re-mux if needed.","Handle the error and fall back to a different source or skip the tracks field if it is optional for your use case."],"exampleFix":"// before\nawait parseMedia({ src, fields: { tracks: true } }); // throws on trackless file\n\n// after\ntry {\n  const { tracks } = await parseMedia({ src, fields: { tracks: true } });\n} catch (e) {\n  if (String(e.message).includes('no tracks have been found')) {\n    // not a usable media file; handle gracefully\n  } else throw e;\n}","handlingStrategy":"try-catch","validationCode":"import { statSync } from 'node:fs';\nfunction looksLikeMedia(src: string): boolean {\n  try { statSync(src); } catch { return false; }\n  return /\\.(mp4|mov|webm|mkv|mp3|wav|m4a|aac)$/i.test(src);\n}\nlooksLikeMedia(src);","typeGuard":"const isLikelyMedia = (s: string) => /\\.(mp4|mov|webm|mkv|mp3|wav|m4a|aac)$/i.test(s);","tryCatchPattern":"try { const { tracks } = await parseMedia({ src, fields: { tracks: true } }); } catch (e) { if (/no tracks have been found/.test(String((e as Error).message))) { /* not a usable media file - handle */ } else throw e; }","preventionTips":["Validate file type before parsing.","For network mp4, ensure the moov atom is reachable (faststart).","Handle 'no tracks' as an expected user-input error, not a crash."],"tags":["media-parser","tracks","container","corrupt-file","validation"],"backgroundTag":null,"analyzedSha":"78fe4bb3fdb5a2cd68724393d63cb223db333fa7","analyzedAt":"2026-08-12T17:18:50.444Z","schemaVersion":2},"datasetVersion":"2026-08-12T18:17:37.767Z"}