# Insert images ![](https://i.imgur.com/t71952C.png) ![](https://i.imgur.com/iYssEhr.png)
Last changed by  
 
dk00
35

Read more

Derek Shih

Staff Software Engineer LinkedIn GitHub StackOverflow Skills Web Frontend: JavaScript/TypeScript, React, Redux, HTML, CSS Web Video Playback: In-depth knowledge of corss device/OS compatibility, DASH, HLS Work Experience

12/1/2022
Using Phone Cameras with `getUserMedia`

Multi camera cases Even cheap phones can have multiple cameras, but the default camera for getUserMedia is probably not the "primary", and may lack focus feature, which is important for scanning barcodes. const changeCamera = (video, {index} = {}) => { const devices = (await navigator.mediaDevices.enumerateDevices()).filter( device => device.deviceId && device.kind === 'videoinput' ) if (video.srcObject && devices.length === 1) { return

1/23/2022
Read more from dk00
Published on HackMD