getUserMedia() Limited to 60 FPS Despite Camera Supporting 120 FPS

[Terry Lo]

I am experiencing an issue where navigator.mediaDevices.getUserMedia() returns a video stream limited to approximately 60 FPS, despite my camera (ACER WVGA 120fps User Facing) and system supporting 120 FPS. My setup includes a 165 Hz display, and I am using Chrome (version [insert your version]) on [insert OS, e.g., Windows 11].

Steps to Reproduce:

1. Set constraints to { video: { width: 640, height: 360, frameRate: { exact: 120 } } }.
2. Use navigator.mediaDevices.getUserMedia() to access the camera.
3. Process the stream with MediaStreamTrackProcessor and measure actual frame intervals.
4. Observe that the frame rate stabilizes around 60-66 FPS (frame intervals ~15-16 ms), even though the camera reports support for 120 FPS (confirmed via a camera FPS test tool).

Please advise if this is an intended limitation or a bug. Suggestions for enabling 120 FPS or pointers to relevant documentation would be appreciated.

1. 
   
   

[Harald Alvestrand]

Before going further, can you fill in the details where the template says "Chrome (version [insert your version]) on [insert OS, e.g., Windows 11]."?

Different OSes have different limitations, the Chrome version may matter, and I don't think we've done much testing for 120hz support.

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[Philipp Hancke]

https://issues.chromium.org/issues/424506442 says "Windows"

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[Terry Lo]

The code is as attached: getUserMedia_0616.txt

Chrome version:137.0.7151.104 (Official Build) (64-bit)
OS:Windos 11 Pro

Philipp Hancke 在 2025年6月14日 星期六凌晨2:44:16 [UTC+8] 的信中寫道：

[Terry Lo]

The code is as attached: getUserMedia_0616.txt
Chrome version:137.0.7151.104 (Official Build) (64-bit)
OS:Windos 11 Pro

Philipp Hancke 在 2025年6月14日 星期六凌晨2:44:16 [UTC+8] 的信中寫道：

https://issues.chromium.org/issues/424506442 says "Windows"