Every IPTV app keeps a few seconds of video in a buffer, so small hiccups in your connection never reach the screen. Buffering happens when data arrives more slowly than the app plays it and the buffer runs dry. Freezing, a picture that stops while sound carries on, or the other way round, has the same causes. The fixes below are in order from quickest to most involved.
Match your symptom to the likely cause
| What you see | Likely cause | Try first |
|---|---|---|
| Buffers every evening, fine in the day | Busy household network or peak-time congestion | Pause downloads and backups; wire the TV device |
| Freezes every few seconds on every channel | Weak or unstable Wi-Fi at the TV | 5 GHz Wi-Fi, the HDMI extender, or Ethernet |
| One channel buffers, others are fine | That channel's stream | Tell us the channel and the time |
| Picture freezes but sound carries on | The device struggling to decode the video | Switch the app's player or decoder; check 4K is going to a 4K device |
| Only buffers with a VPN switched on | VPN overhead or a distant server | Turn the VPN off and compare |
| Started after a new router or broadband switch | Wi-Fi settings or band | Reconnect the device to the 5 GHz network |
1. Find out where the problem is
- One channel or all of them? One channel buffering while others are fine points to that channel's stream. Message us which one.
- One device or all of them? If your phone plays smoothly but the TV stick doesn't, focus on that device and its connection.
- Always, or only in the evening? Peak-time buffering often means household bandwidth or Wi-Fi congestion.
Measure the speed where it matters: on the TV device itself. Open fast.com in the device's web browser, or install a speed-test app from its app store. A phone held next to the router tells you very little about the signal reaching a stick behind the TV.
2. Fix the connection
Use a cable if you can
An Ethernet cable from router to TV device removes almost all Wi-Fi problems at once. Fire TV Sticks and Chromecasts need an adapter; most boxes and TVs have a port. Any Cat 5e or Cat 6 cable will do: both carry 1 Gbps, far more than any stream needs. Powerline adapters, which send network signals through your home's wiring, are an option if the router is far away; their real speed is usually well below the figure on the box, so run a speed test once they're in.
Improve Wi-Fi
- Connect to your router's 5 GHz network rather than 2.4 GHz if the device supports it.
- Move the router into the open, off the floor and away from the TV's back panel, metal and fish tanks.
- Use the HDMI extender supplied with your stick so it sits away from the TV's back.
- In larger homes, a mesh Wi-Fi system puts a strong signal where the TV is.
- In flats, where many neighbouring networks share the air, restarting the router lets it pick a quieter channel.
Free up bandwidth
Pause large downloads, game updates and cloud backups during live TV. As a rough guide, allow around 10 Mbps for each HD stream and 25 Mbps for each 4K stream on top of everything else. So a household watching two HD screens and one 4K screen at once needs roughly 45 Mbps spare. If the household regularly runs short, consider HD Premium on some screens. If your router has a device-priority or QoS setting, give the TV device priority.
Switch off your VPN to test
A VPN adds overhead and delay. Turn it off and compare. See IPTV and VPNs.
3. Tune the app
- Buffer size: some players let you increase it. A larger buffer smooths unsteady connections at the cost of a slightly longer delay when changing channel.
- Player or decoder: try another internal player, or switch between hardware and software decoding.
- Stream format: where offered, try HLS instead of MPEG-TS, or vice versa.
- Clear the cache and update the app to the latest version.
What the buffer size setting does
The buffer is the few seconds of video the app downloads ahead of what you're watching. A small buffer starts channels quickly but has little in reserve when the connection dips. A larger one rides out short dips, but each channel takes longer to start, and it can't help if the connection is slower than the stream for minutes at a time. If a larger buffer only delays the freezing, the connection is the real problem.
4. Check the device
If menus are sluggish too, the device itself may be struggling, particularly older sticks with 4K streams or big TV guides. See Fire TV Stick lagging and Android TV box problems. Make sure 4K content is going to a 4K-capable device; our devices guide lists the requirements.
5. Check your broadband line
If every device buffers even when nothing else is running, test your broadband with a wired computer. If speeds are well below what you pay for, restart the router (off at the wall for 30 seconds) and contact your broadband provider. Check whether there's a known fault in your area too.