buddymeet shortcode parameter to limit video resolution

I ran an 8×8 meeting last night using the [buddymeet shortcode on my website. It worked but the audio quality was very poor, probably due to limited bandwidth at participant locations. I know how to pass parameters to the shortcode but I don’t know how to limit the video resolution or frame rate as described in the JITSI API documentation.

resolution: 720,
maxFps: 10,
constraints: {
video: {
aspectRatio: 16 / 9,
frameRate: {
max: 15
},
height: {
ideal: 720,
max: 720,
min: 240
}
}
},

Any help or example shortcode would be appreciated.