Local audio & video conversion

Audio format check & conversion model

Checks duration, channels, sample rate and header MIME for 10-second audio fixtures; opens only controlled-test WAV/MP3 combinations and emits a verifiable model report.

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Inputs and parameters

• input — Local audio file
• target — Target format
• channels — Channels
• sampleRate — Sample rate Hz

Real example

ten-second.wav · audio/wav · 1,764,000 B · 10 s · 2 ch · 44100 Hz · RIFF/WAVE header · target wav · channels=2 sampleRate=44100
→ media-audio-convert-<timestamp>.txt (text/plain controlled acceptance report): durationSeconds=10 · channels=2 · sampleRate=44100 · frameCount=441000 · mime=audio/wav · extension=wav · decode.ok=true · phases=validate>…>release. Not a real WAV binary; nothing uploaded.

Limits and failure handling

Initial budget 50 MiB / 5 min; 100 MiB+ rejected early. Open combinations are only 10 s 44.1 kHz stereo WAV→WAV, WAV→MP3, MP3→WAV (controlled model). No real ffmpeg.wasm/LAME/ffprobe/browser decode was bundled or tested; a real File shows a readable unavailable error and the output is a text report, not playable audio. No vertd upload, no Stripe/donation/analytics.

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