Video audio with a soundtrack and soundtrack loop

Shotstack API
2

Hi Josue!

Audio can be muted by using an AudioAsset instead of Soundtrack. You can mute the AudioAsset by setting it’s volume to zero, and set it’s start, length and trim position like other assets.

Here is a JSON example showing how to start playing audio, then mute, then resume at the spot it was left off:

{
    "timeline": {
        "tracks": [
            {
                "clips": [
                    {
                        "asset": {
                            "type": "video",
                            "src": "https://shotstack-assets.s3-ap-southeast-2.amazonaws.com/footage/sparks-sd.mp4"
                        },
                        "start": 0,
                        "length": 5
                    },
                    {
                        "asset": {
                            "type": "audio",
                            "src": "https://shotstack-assets.s3-ap-southeast-2.amazonaws.com/music/unminus/palmtrees.mp3"
                        },
                        "start": 0,
                        "length": 2
                    },
                    {
                        "asset": {
                            "type": "audio",
                            "src": "https://shotstack-assets.s3-ap-southeast-2.amazonaws.com/music/unminus/palmtrees.mp3",
                            "volume": 0
                        },
                        "start": 2,
                        "length": 1
                    },
                    {
                        "asset": {
                            "type": "audio",
                            "src": "https://shotstack-assets.s3-ap-southeast-2.amazonaws.com/music/unminus/palmtrees.mp3",
                            "trim": 3
                        },
                        "start": 3,
                        "length": 2
                    }
                ]
            }
        ]
    },
    "output": {
        "format": "mp4",
        "resolution": "sd"
    }
}

The Soundtrack property doesn’t support looping, but check out this other community post Loop/repeat a sound track for some ideas.

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