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d4eaa655b2
The Convert Audio tool promised configurable bitrate, sample rate, and channel count, but only format and bitrate were exposed. Adds an optional sampleRate setting (8000 to 96000 Hz, omitted = preserve source) wired through the Zod schema, the FFmpeg -ar flag, the standalone settings panel, and the pipeline builder controls. Impossible combinations fail loudly instead of degrading silently: MP3 + 96000 Hz is rejected (libmp3lame caps at 48 kHz), and MP3 bitrates above the encoder ceiling at low rates (64 kbps at 8 kHz, 160 kbps at 16/22.05 kHz) are rejected rather than clamped. The UI offers only legal combinations and sanitizes stored pipeline settings on load. Docs updated in English plus all 20 localized pages with refreshed i18n_source_hash stamps; two new UI strings added to all 21 locales. Fixes #558
50 lines
1.9 KiB
Markdown
50 lines
1.9 KiB
Markdown
---
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description: Convert audio between MP3, WAV, OGG, FLAC, and M4A formats.
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---
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# Convert Audio {#convert-audio}
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Convert audio files between common formats including MP3, WAV, OGG, FLAC, and M4A, with configurable output bitrate and sample rate.
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## API Endpoint {#api-endpoint}
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`POST /api/v1/tools/audio/convert-audio`
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Accepts multipart form data with an audio file and a JSON `settings` field.
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## Parameters {#parameters}
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| Parameter | Type | Required | Default | Description |
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|-----------|------|----------|---------|-------------|
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| format | string | No | `"mp3"` | Output format: `mp3`, `wav`, `ogg`, `flac`, `m4a` |
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| bitrateKbps | integer | No | `192` | Output bitrate in kbps (32 to 320) |
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| sampleRate | integer | No | source rate | Output sample rate in Hz: `8000`, `16000`, `22050`, `32000`, `44100`, `48000`, or `96000`. Omit to keep the source rate |
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## Example Request {#example-request}
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```bash
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curl -X POST http://localhost:1349/api/v1/tools/audio/convert-audio \
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-H "Authorization: Bearer si_your-api-key" \
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-F "file=@audio.mp3" \
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-F 'settings={"format": "mp3", "bitrateKbps": 192, "sampleRate": 44100}'
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```
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## Example Response {#example-response}
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```json
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{
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"jobId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
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"downloadUrl": "/api/v1/download/a1b2c3d4-e5f6-7890-abcd-ef1234567890/audio.mp3",
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"originalSize": 4500000,
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"processedSize": 2800000
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}
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```
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## Notes {#notes}
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- Supported input formats include MP3, WAV, OGG, FLAC, AAC, M4A, WMA, AIFF, and OPUS.
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- Bitrate only applies to lossy formats (MP3, OGG, M4A). Lossless formats like WAV and FLAC ignore this setting.
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- MP3 output supports sample rates up to 48000 Hz. The 96000 Hz option applies to WAV, OGG, FLAC, and M4A only.
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- MP3 bitrate is capped by the sample rate: at most 64 kbps at 8000 Hz and 160 kbps at 16000 or 22050 Hz. Requests above the cap are rejected instead of being silently lowered.
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- The output filename keeps the original name with the new extension.
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