Use an Apple TV 4K. For HDR, use the 2nd generation (2021) or newer, as the 2017 model isn't recommended. The HD model doesn't support 10-bit video.
Hardware Requirements For Apple TV
Apple TV 4K (2nd generation, 2021 or newer, for HDR)
Power Cable
Siri or Bluetooth-connected remote
HDMI Cable
Recommended: Ethernet connected
Recommended: Ultra High-Speed HDMI Cable
Setting Up Apple TV for HDR
In the Presenter settings, set Dynamic Range to HDR. (HDR isn’t available if your Capture format is 8-bit.) Delivery Format will then only offer 10-bit options. Then set your Apple TV to HDR mode, and set the refresh rate to match the session frame rate.
Your Apple TV is set to 4K HDR (HDR 10), by default. You should change the resolution to 1080p. The refresh rate is also set to 60 (59.94Hz) or 50 depending on your region. Set it by hand to match the session frame rate (for example, 24Hz for 24fps). The ClearView Flex app doesn't change it for you.
Here is an example of how to set your Apple TV’s dynamic range to HDR and match a source frame rate of 24fps for true 24fps.
Open the Settings App from the main menu
2. In settings, click on the “Video and Audio” menu entry
3. Click the format menu entry and scroll down to the bottom. Click “Other Formats”
4. Scroll down to the bottom to select 1080p HDR 24hz
5. Click “OK” to confirm the new setting. Your screen might turn black for a few seconds depending on what it was previously configured to.
If your source sends full range video
The right Apple TV setting depends on your capture format:
10-bit 4:2:2 YUV (default): your source must send legal range. Set the Apple TV to HDR.
10-bit 4:4:4 RGB: your source sends full range. Since tvOS 17, an Apple TV in HDR mode treats this as legal range, which crushes blacks and clips highlights. Fix it one of two ways:
Recommended: ask Sohonet Support to convert your Flexbox to legal range. This applies to every HDR session on that Flexbox, for every viewer. Then set your display's range to Auto or Legal.
Set the Apple TV to Dolby Vision, with your display input set to full range. Your display must support Dolby Vision.
Setting Up Apple TV for SDR
You should consider configuring your Apple TV to be in SDR mode and for the refresh rate to match the frame rate of the source content. By default, your Apple TV will be set to 4K HDR (which is HDR10). This may cause issues where the content is tone mapped incorrectly. The refresh rate is also set to 60 (59.94Hz) which may be incorrect unless your source frame rate already matches. Here is a guide of how to set your Apple TV’s dynamic range to SDR and to match a source frame rate of 24fps.
1. Open the Settings app from the main menu
- In Settings, click on the Video and Audio menu entry
- Click the Format menu entry and scroll down to the bottom, then click Other Formats
- Scrolling again to the bottom of the new list, select 1080p SDR 24Hz
- Confirm the new setting by clicking OK (the screen will turn black for a few seconds
2. Set Chroma Subsampling to RGB High
- Back in the Video and Audio menu, select HDMI Output
- Then select RGB High (this corresponds to Legal Range)
- Confirm the new setting by clicking OK (the screen will turn black for a few seconds)
3. Set Match Content to On
- Back in the Video and Audio menu, click the Match Content entry
- Then turn Match Dynamic Range and Match Frame Rate to On
This last setting may be redundant as we have already forced the Apple TV’s dynamic range and frame rate, but it is good practice to always turn those options on.
Full video instructions below