Prepare two clips
Use one programme with obvious camera movement and a second item in a different documented format. Keep the Apple TV, receiver and television on the same input path. Write down what the display reports before you open the first clip. If you can read the app’s source format, note it separately.
The Match Dynamic Range and Match Frame Rate options live under Video and Audio on supported Apple TV models. Turning on frame-rate matching can help with cadence when the source and fixed output differ. Turning on dynamic-range matching can change the format sent over HDMI when the source starts. Test each setting on its own before enabling both.
Read the transition
A short blank as the equipment changes format can happen at the beginning or end of playback. Some combinations of equipment support quicker transitions in some modes. If you get a long blank or have to change input to recover, switch back to the known working mode and test again.
| Symptom | First comparison |
|---|---|
| A second or two of black between menu and video | Record the old and new formats and whether the picture returns. |
| Picture stays black on one format | Use a known working output and test the direct TV connection. |
| The programme plays with steady judder | Compare the app’s source frame rate and the output setting. |
| Only one app shows the issue | Use a second known item or app before changing every device setting. |
Remove the middle device for one run
If a receiver or switch is on the path, test a direct connection from Apple TV to a supported TV input when practical. Keep the same programme and output setting. A direct picture that works gives you a concrete change to investigate in the receiver or switching path. Put the normal wiring back after the test and keep a note of both runs.
Write down the format that failed
The useful details are Apple TV model, app version, TV model, receiver if present, current input, and the format before and after the black screen. If you only know the TV input signal, say that. The result helps another reader separate an app’s rendition from an HDMI mode or display setting.