Mix multiple audio tracks together
| Param | Type | Description |
|---|---|---|
| volumes | number[] | Volume level for each input track (e.g., [1.0, 0.3]) |
Single input URL
"https://example.com/video.mp4"
[
{
"type": "transcode",
"params": { "format": "mp4", "codec": "h264" }
}
]URL to receive job completion notification
File size hint in bytes (for plan limit validation)