spacebox/demo/config.json

{
    "display":
    {
        "dimensions": [640, 480]
    },
    "path":
    {
        "screenshots": "local/screenshots",
        "video": "local/video"
    },
    "gamepad":
    {
    },
    "keys":
    {
        "context": " "
    },
    "recording":
    {
        "write-mp4": true
    }
}