navigator.mediaDevices.getUserMedia視頻質量和麪對模式約束

Question

我無法指定視頻質量和相機面臨約束在一起。 有沒有辦法將下面的約束結合起來？

{ 
    audio: true, 
    video: { width: 1280, height: 720 } 
} 

{ audio: true, video: { facingMode: "user" } } 

Answer 1

navigator.mediaDevices.getUserMedia({audio:true,video:getConstraints(1280,720)}) 

function getConstraints(videowidth, videoheight) { 
constraints = { 
       facingMode: { exact: "environment" }, 
       width: { min: videowidth, ideal: videowidth, max: videowidth},  
       height: { min: videoheight, ideal: videoheight, max: 
       frameRate : {min: 5, max: 8 } 
       }; 

return constraints; 
}