SRT vs RTMP: Which Protocol Should You Use for IRL Streaming?

Short answer: SRT is generally the better choice for IRL streaming because it handles packet loss and unstable networks far better than RTMP. RTMP still works fine on wired or strong Wi-Fi connections, but on cellular data — which is what most IRL streamers rely on — SRT is the more reliable option.

Let's break down what these protocols actually do, how they differ in practice, and how to decide which one fits your setup.

What is RTMP

RTMP (Real-Time Messaging Protocol) is one of the oldest streaming protocols still in wide use. It was originally built for Flash video and later adopted as the standard way to send video to platforms like Twitch and YouTube. It's simple, well supported by almost every encoder and app, and works great over a stable connection — think home Wi-Fi or ethernet.

The catch: RTMP was never designed for unreliable networks. It doesn't have built-in mechanisms to recover from packet loss. If your connection drops even briefly, the video can freeze, glitch, or disconnect entirely.

What is SRT

SRT (Secure Reliable Transport) is a newer, open-source protocol built specifically to handle the kind of network conditions IRL streamers deal with every day: cellular data, public Wi-Fi, moving between coverage areas. SRT actively detects packet loss and retransmits lost data in real time, and it adapts to changing network conditions instead of just failing when the connection gets rough.

There's also SRTLA (SRT with Link Aggregation), which takes this a step further by bonding multiple connections — for example, two SIM cards plus Wi-Fi — into a single, more stable stream. This is the technology behind most modern bonded encoders and apps used for IRL, like Moblin and IRL Pro.

Practical comparison

RTMP SRT Latency Low on stable networks Low, with added error correction Stability on mobile networks Weak — no packet loss recovery Strong — retransmits lost packets App/device compatibility Universal (OBS, most cameras, drones) Growing fast (Moblin, IRL Pro, most modern encoders) Best use case Wired connections, OBS Studio, simple setups Cellular streaming, bonded connections, unpredictable networks Bonding support None Yes, via SRTLA

How this applies to IRL streaming

If you're streaming from a fixed location with strong Wi-Fi — say, a studio setup — RTMP will usually get the job done without issues. But the moment you're walking, driving, or relying on cellular data, the difference becomes obvious. RTMP has no way to recover from a dropped packet; SRT does, and that's the difference between a brief hiccup and your stream falling apart on screen.

This is exactly why most IRL-specific apps (Moblin on iPhone, IRL Pro on Android) default to SRT or SRTLA rather than RTMP — the people building these tools designed them around real-world mobile conditions, not studio setups.

How REESE Live handles this

REESE Live accepts both RTMP and SRT as ingest protocols, so you're not locked into one workflow. If you're streaming from OBS Studio on a stable connection, RTMP works without any extra configuration. If you're streaming from your phone or a bonded encoder in the field, SRT (or SRTLA, depending on your device) gives you the stability you need before your signal even reaches our servers — where drop protection then takes over for anything that still slips through.

Conclusion and recommendation

If you're just getting started with a simple, wired setup, RTMP is fine and easier to configure. But if you're doing any kind of mobile or IRL streaming — walking around, driving, using cellular data — switch to SRT or SRTLA as soon as your app or encoder supports it. The stability gain is significant, and it's the single biggest factor in avoiding dropped streams and split VODs.

Frequently asked questions

Does SRT increase latency compared to RTMP? Not meaningfully. SRT adds a small buffer for error correction, but the difference is usually a fraction of a second — negligible compared to the stability it provides.

Can I switch between RTMP and SRT without changing my whole setup? Yes. Most modern encoders and apps let you choose the protocol in settings, and services like REESE Live accept both, so you can switch based on your connection without reconfiguring your destinations.

Is SRTLA the same as SRT? No — SRTLA is an extension of SRT that adds connection bonding, combining multiple network sources (like two SIMs or Wi-Fi and cellular) into one more stable stream. Regular SRT works over a single connection.

Which one do most professional IRL streamers use? Most serious IRL setups today use SRT or SRTLA for the field connection, precisely because of how it performs on cellular networks.

Want a server that handles both RTMP and SRT reliably, with drop protection built in? Create your REESE Live account and set up your stream in minutes.