Yes. For Blitzz video calls, media should be sent over UDP instead of TCP whenever possible. UDP handles packet loss better in real-time communication.
Why UDP is better for video calls
- TCP automatically resends every dropped packet. That's ideal for file transfers, where every packet matters.
- UDP does not resend lost packets. In a live video call, a resent packet arrives too late to be useful and can cause lip-sync problems.
That's why real-time streaming apps use UDP. They can handle some packet loss or out-of-order packets without hurting the call.
Frequently asked questions
Will Blitzz work if UDP is blocked?
Calls can fall back to TCP, but quality is best when UDP is allowed. See the Blitzz network requirements for the ports to open.