Do you support circle cropping videos?
I wasn’t able to see what formats are supported for upload
Yeah you can. You’ll have to use the luma matte feature.
If you check the JSON below you can see the mask is just a black and white jpg image of a circle. The white area becomes transparent and the circle remains visible.
{
"timeline": {
"soundtrack": {
"src": "https://shotstack-assets.s3-ap-southeast-2.amazonaws.com/music/unminus/palmtrees.mp3",
"effect": "fadeOut"
},
"background": "#000000",
"tracks": [
{
"clips": [
{
"asset": {
"type": "luma",
"src": "https://shotstack-assets.s3-ap-southeast-2.amazonaws.com/luma-mattes/static/circle-sd.jpg"
},
"start": 0,
"length": 10
},
{
"asset": {
"type": "video",
"src": "https://s3-ap-southeast-2.amazonaws.com/shotstack-assets/footage/cat.hd.mp4"
},
"start": 0,
"length": 10
}
]
},
{
"clips": [
{
"asset": {
"type": "video",
"src": "https://shotstack-assets.s3-ap-southeast-2.amazonaws.com/footage/night-sky.mp4"
},
"start": 0,
"length": 10
}
]
}
]
},
"output": {
"format": "mp4",
"resolution": "hd"
}
}
The only caveat with this technique is that the mask image must match the size and shape of the video it is masking otherwise it will stretch to the wrong shape.
There’s also a tutorial on how to create luma matte transitions which is very similar to the effect you are trying to achieve.