# Auto Video Quality on \`stream.attachVideo\` **URL:** \ **Category:** Web\ **Created:** [June 17, 2025, 11:12am UTC](https://devforum.zoom.us/t/auto-video-quality-on-stream-attachvideo/134098 "2025-06-17T11:12:02Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![James\_Ashok](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/james_ashok/32/69492_2.png) [@James\_Ashok](https://devforum.zoom.us/u/James_Ashok)\ **Post date:** [June 17, 2025, 11:12am UTC](https://devforum.zoom.us/t/auto-video-quality-on-stream-attachvideo/134098/1 "2025-06-17T11:12:02Z")
**Description** `stream.attachVideo` currently takes a required `videoQuality` parameter that can be one of `90P/180P/360P/720P/1080P` resolution values. In addition to these options, can we please have an `Auto` option where Zoom decides the best resolution to render the video based on network/device capabilities? This shall be similar to `ZoomVideoSDKVideoPreferenceMode_Balance` mode of the Android/iOS VideoSDK. For our custom web-app, where calls are between 2 participants, we are showing a video quality control to render the remote participant video. We provide options for `Auto, FHD-1080, HD-720, SD-360`. While, the other three resolutions are straight forward with Web VideoSDK, for `Auto` we are implementing a custom solution where we are checking network quality with `stream.getNetworkQuality()` every minute and adjusting the video resolution if network quality drops. Problem starts when `stream.getNetworkQuality()` frequently returns `downlink: -1` poor quality rating on even good networks, so our `Auto` mode decreases video quality to the lowest resolution; whereas if we select `FHD-1080`, then zoom is able to consistently render high quality FHD videos even if it still recognises our network quality as `-1` So, the request is, - can we please have an `Auto` option on the `VideoQuality` enum? where on passing this value to `stream.attachVideo`, Zoom shall adjust the rendered video resolution automatically based on network/device capabilities. - can we improve the `stream.getNetworkQuality()` implementation or make its logic more transparent? as we are consistently seeing good quality networks frequently rated as `-1` **Which Web Video SDK version?** 2.1.10 **Video SDK Code Snippets** ```auto const getAutoResolution = ({ downlink }: NetworkQuality) => { // downlink: 4, 5 let resolution = VideoQuality.Video_1080P; switch (true) { case downlink === 3: resolution = VideoQuality.Video_720P; break; case downlink === 2 || downlink === 1: resolution = VideoQuality.Video_360P; break; case downlink < 1: resolution = VideoQuality.Video_180P; break; default: break; } return resolution; }; ... setInterval(() => { getAutoResolution(stream.getNetworkQuality()); }, 60000); // 1 minute ``` ![stream.attachVideo](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/2/0/20459f83a9216972e262239fcaf9552c0f9b29a9.png) **Device (please complete the following information):** - OS: macOS and Windows - Browser: All ---
**Author:** ![ekaansh.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/ekaansh.zoom/32/55004_2.png) [@ekaansh.zoom](https://devforum.zoom.us/u/ekaansh.zoom)\ **Post date:** [June 17, 2025, 11:53am UTC](https://devforum.zoom.us/t/auto-video-quality-on-stream-attachvideo/134098/2 "2025-06-17T11:53:47Z")
Hi @James_Ashok, The `VideoQuality` enum you pass to `stream.attachVideo` is the desired/target quality for your app. Zoom will intelligently downgrade the quality in case the network deteriorates to keep the video consistent. For your use-case you can set the enum to the highest target value and leave the switching logic to us. ---
**Author:** ![James\_Ashok](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/james_ashok/32/69492_2.png) [@James\_Ashok](https://devforum.zoom.us/u/James_Ashok)\ **Post date:** [June 17, 2025, 12:03pm UTC](https://devforum.zoom.us/t/auto-video-quality-on-stream-attachvideo/134098/3 "2025-06-17T12:03:56Z")
thanks @ekaansh.zoom! 1. so, does that mean for my use-case, the `Auto` and `FHD-1080` options are one and the same? 2. when I pass the `VideoQuality` enum, I am actually setting the max quality and not the exact quality.. is that right? ---
**Author:** ![freelancer.nak](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/freelancer.nak/32/40968_2.png) [@freelancer.nak](https://devforum.zoom.us/u/freelancer.nak)\ **Post date:** [June 17, 2025, 12:12pm UTC](https://devforum.zoom.us/t/auto-video-quality-on-stream-attachvideo/134098/4 "2025-06-17T12:12:16Z")
@James_Ashok Thanks for the update and the request regarding auto video quality selection. To ensure high-quality video rendering, you should enable HD support and explicitly request Full HD in your video capture options before starting the video: ```auto const isHD = stream.isSupportHD(); // Check if HD is supported const videoCaptureOptions = { fullHd: true, // Request Full HD hd: isHD // Enable HD based on support }; await stream.startVideo(videoCaptureOptions); ``` Also, when attaching remote video, explicitly set the desired quality: ```auto stream.attachVideo(participantId, VideoQuality.Video_1080P); ``` This helps maintain consistent Full HD video rendering. Fully support the suggestion to introduce an `Auto` option in the `VideoQuality` enum for `stream.attachVideo()`, allowing the SDK to automatically adjust resolution based on network and device capabilities—similar to the `Balance` mode in the Android/iOS SDK. ---
**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\ **Post date:** [June 17, 2026, 12:12pm UTC](https://devforum.zoom.us/t/auto-video-quality-on-stream-attachvideo/134098/5 "2026-06-17T12:12:27Z")
Closed on June 17, 2026, 12:12pm UTC This topic was automatically closed 365 days after the last reply. New replies are no longer allowed.