{"record":{"id":"b08d71945a5c65d8","repo":"Zackriya-Solutions/meetily","slug":"failed-to-probe-audio-format","errorCode":null,"errorMessage":"Failed to probe audio format: {}","messagePattern":"Failed to probe audio format: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"frontend/src-tauri/src/audio/decoder.rs","lineNumber":443,"sourceCode":"        .map_err(|e| anyhow!(\"Failed to open audio file '{}': {}\", decode_path.display(), e))?;\n\n    let mss = MediaSourceStream::new(Box::new(file), Default::default());\n\n    // Set up format hint based on file extension\n    let mut hint = Hint::new();\n    if let Some(ext) = decode_path.extension().and_then(|e| e.to_str()) {\n        hint.with_extension(ext);\n    }\n\n    // Probe the file format\n    let probed = symphonia::default::get_probe()\n        .format(\n            &hint,\n            mss,\n            &FormatOptions::default(),\n            &MetadataOptions::default(),\n        )\n        .map_err(|e| anyhow!(\"Failed to probe audio format: {}\", e))?;\n\n    let mut format = probed.format;\n\n    // Find the first audio track\n    let track = format\n        .tracks()\n        .iter()\n        .find(|t| t.codec_params.codec != CODEC_TYPE_NULL)\n        .ok_or_else(|| anyhow!(\"No audio track found in file\"))?;\n\n    let track_id = track.id;\n\n    // Get audio parameters\n    let sample_rate = track\n        .codec_params\n        .sample_rate\n        .ok_or_else(|| anyhow!(\"Unknown sample rate\"))?;\n","sourceCodeStart":425,"sourceCodeEnd":461,"githubUrl":"https://github.com/Zackriya-Solutions/meetily/blob/0281737d87d26352fb0adc78c8c0975f691b23d1/frontend/src-tauri/src/audio/decoder.rs#L425-L461","documentation":"Symphonia's probe could not identify a supported container/codec from the MediaSourceStream plus the Hint built from the file extension. The extension hint can actively mislead: a renamed file (e.g. Opus-in-Ogg named .mp3) makes the prober expect the wrong format. Other causes are truncated headers after interrupted transfers and containers outside Symphonia's compiled default feature set. Note this path is only reached for extensions Symphonia claims to handle — genuinely foreign extensions went through ffmpeg first.","triggerScenarios":"File extension doesn't match actual content (manual rename); header truncated by an interrupted copy/download; a container that requires a cargo feature not enabled in the build; empty or tiny garbage files.","commonSituations":"Files renamed for organization, re-uploaded downloads that got cut off, odd muxer outputs from niche tools.","solutions":["Verify the file's real format with `ffprobe <file>` or a player — renaming between extensions breaks the extension Hint.","Rename the file to its true extension, or convert it to .wav/.m4a with ffmpeg before importing.","Code fix: on probe failure, retry with an empty Hint (no extension) so Symphonia sniffs the actual bytes (see exampleFix).","If a specific container matters to your users, enable the corresponding symphonia cargo feature."],"exampleFix":"// before\nlet probed = symphonia::default::get_probe()\n    .format(&hint, mss, &FormatOptions::default(), &MetadataOptions::default())\n    .map_err(|e| anyhow!(\"Failed to probe audio format: {}\", e))?;\n\n// after — retry without the (possibly wrong) extension hint\nlet probed = match symphonia::default::get_probe()\n    .format(&hint, mss, &FormatOptions::default(), &MetadataOptions::default())\n{\n    Ok(p) => p,\n    Err(_) => {\n        let file = std::fs::File::open(decode_path.as_ref())?;\n        let mss2 = MediaSourceStream::new(Box::new(file), Default::default());\n        symphonia::default::get_probe()\n            .format(&Hint::new(), mss2, &FormatOptions::default(), &MetadataOptions::default())\n            .map_err(|e| anyhow!(\"Failed to probe audio format: {}\", e))?\n    }\n};","handlingStrategy":"fallback","validationCode":"// trust content, not the filename: sniff magic bytes before setting the Hint\nlet mut magic = [0u8; 12];\nlet mut f = std::fs::File::open(&decode_path)?;\nstd::io::Read::read_exact(&mut f, &mut magic)?;\n// map magic (e.g. 'OggS', 'RIFF', 'fLaC') to the extension used for the Hint","typeGuard":null,"tryCatchPattern":"// on probe failure: retry once with an empty Hint (drop the extension) so Symphonia sniffs the real container; if that also fails, offer ffmpeg conversion to WAV","preventionTips":["Never rename audio files to a different extension.","When exporting from other tools, prefer WAV/FLAC/M4A.","Treat probe failure as a routing signal to the ffmpeg path, not a dead end."],"tags":["symphonia","format-probe","bad-extension","audio-decode"],"backgroundTag":"audio-format-probe-failed","analyzedSha":"0281737d87d26352fb0adc78c8c0975f691b23d1","analyzedAt":"2026-08-16T20:57:52.567Z","schemaVersion":2},"datasetVersion":"2026-08-16T23:17:17.608Z"}