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All 181 docs markdown files translated into 20 languages (apps/docs/<locale>/**). Companion to the i18n code PR; admin-merged because the file count exceeds GitHub's per-PR CI trigger limit. Validated by pnpm i18n:check (all surfaces, 0 stale/missing) and a clean all-locale docs build.
49 lines
1.5 KiB
Markdown
49 lines
1.5 KiB
Markdown
---
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description: "從影片中取出音訊軌。"
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i18n_source_hash: f5b8330a5f89
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i18n_provenance: human
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i18n_output_hash: 83f38576dff2
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---
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# Extract Audio {#extract-audio}
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從影片檔案中擷取音訊軌，並儲存為 MP3、WAV、M4A 或 OGG。
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## API Endpoint {#api-endpoint}
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`POST /api/v1/tools/video/extract-audio`
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接受包含一個影片檔案和一個 JSON `settings` 欄位的 multipart form data。
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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"` | 輸出音訊格式：`mp3`、`wav`、`m4a`、`ogg` |
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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/video/extract-audio \
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-H "Authorization: Bearer si_your-api-key" \
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-F "file=@clip.mp4" \
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-F 'settings={"format": "mp3"}'
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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/clip.mp3",
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"originalSize": 12500000,
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"processedSize": 3200000
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}
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```
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## Notes {#notes}
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- 若影片沒有音訊軌，請求會回傳 400 錯誤。
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- MP3 是有損格式但相容性廣泛。WAV 是無損格式但檔案較大。M4A（AAC）在品質和大小之間取得良好的平衡。OGG 可用於開放編解碼器工作流程。
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- 當來源音訊已是 AAC 且輸出格式為 M4A 時，音訊串流會直接複製而不重新編碼。
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