Chromecast Ultra is designed to pick the maximum refresh rate (up to 60Hz) and resolution supported by your 4K Ultra HD TV's HDMI connection. Some TVs are incapable of a 60Hz HDMI connection at 4K resolution. When connected to such a TV, the video smoothness feature will select a 1080p 60Hz connection to ensure fluid playback and prevent jerkiness or stuttering issues when viewing content. Video smoothness is on by default.
We recommend keeping video smoothness turned on. If you turn off video smoothness,
- Chromecast Ultra will prioritize playing the content at the highest resolution while lowering the frame rate to fit the constraints of the TV. So a 4K TV that doesn't support 4K 60Hz will default to 4K 30Hz.
- Your content may appear jerky or stutter.
- Even if you turn off video smoothness, streaming services may force a higher frame rate to maintain video smoothness. This happens on the partner side and can’t be overridden by Chromecast Ultra.
Turn off video smoothness
- Make sure your mobile device or tablet is linked to the same account as your Chromecast.
- Open the Google Home app
.
- Tap and hold your device's tile.
- Tap Settings
Video.
- Turn off Video smoothness
.
.
Video.Learn more about streaming 4K Ultra HD content with Chromecast Ultra.