Why 4K channels use HEVC
HEVC was designed to deliver similar picture quality to H.264 at a much lower bitrate. That saving is what makes 4K practical over broadband: a 4K channel in H.264 would need a much faster, steadier connection than most homes have. With HEVC, a 4K channel typically needs around 15 to 25 Mbps. See internet speed for IPTV.
HEVC also supports 10-bit colour, which HDR formats rely on, so HDR channels are usually HEVC too.
Checking your device
- Look up the specifications for your stick, box or TV and search for “HEVC” or “H.265” under video codecs or formats.
- Check for 10-bit or “Main 10” support if you want HDR.
- Test a 4K channel. Smooth playback confirms hardware decoding; a black screen or stutter suggests the device can’t cope.
Most 4K-capable streaming sticks and boxes sold in recent years decode HEVC. HD-only models, older boxes and some budget devices may not, or may decode it only at lower resolutions.
Fixing HEVC playback problems
| Symptom | Likely cause | Fix |
|---|---|---|
| Black screen with sound | No HEVC hardware decoding | Use the HD or H.264 version of the channel |
| Stutter on 4K only | Device decoding at its limit | Use HD, or a more capable device |
| Plays in one app, not another | The app uses a different decoder | Switch the app’s player engine, or use the app that works |
| HDR looks washed out | The HDR signal isn’t reaching the TV correctly | Check the HDR settings on the device and the TV’s HDMI port |
More fixes are in codec not supported and black screen.
HEVC compared
- Against H.264: better quality at the same bitrate, at the cost of heavier decoding. See H.264 vs H.265.
- Against AV1: AV1 is newer and royalty-free, with support mostly on the latest devices. For 4K IPTV today, HEVC is still the common choice.