What does the Solo Pro do that the Solo does not?

SRT and HEVC. A LiveU Solo streams RTMP only, which means no gap tolerance and H.264 alone. The Solo Pro adds SRT, which recovers from brief losses instead of ending, and HEVC, which gets more picture out of the same bitrate. If you have a Pro, using it as an RTMP unit wastes both.

Do I configure SRTLA on a Solo Pro?

No. LiveU bonds with its own LRT layer inside the unit and sends you one already-bonded SRT stream. SRTLA is a different bonding scheme for encoders that do not have one. Point the Solo Pro at the SRT endpoint, not the SRTLA one.

Which SRT latency should I use?

Start at 2500 ms. That is enough room for LiveU's own recovery plus the cellular jitter underneath it. Lower values look attractive on paper and give SRT less room to retransmit, which is the thing you are paying for.

Will HEVC work in my OBS?

Current OBS releases decode HEVC over SRT. Older builds do not, and the failure is silent — a black source rather than an error. Test HEVC before you rely on it, and keep H.264 as the fallback if your studio machine is old.

Caller or listener mode?

Caller. The Solo Pro dials out to our relay, which is what you want on a cellular connection where nothing can dial in to the unit.

How to Connect a LiveU Solo Pro to Your Relay over SRT

The combined LiveU guide covers both units and is the right starting point if you are choosing between them. This page is the Solo Pro specifically, because the two things it adds over a Solo — SRT and HEVC — both need decisions the Solo never asks you for.

SRT

not SRTLA

2500 ms

latency to start at

HEVC

more picture per megabit

First: LiveU bonds itself

This trips people up coming from a Belabox or an IRLBox. Those encoders hand the bonding problem to SRTLA and expect the relay to reassemble the pieces. LiveU does not. Its LRT layer bonds your modems inside the unit and emits one stream.

So there is no SRTLA to configure and no SRTLA endpoint to create. You want a plain SRT endpoint, and the Solo Pro will fill it with an already-bonded feed.

Step 1: create an SRT endpoint

In the dashboard, create an SRT relay endpoint in the region nearest to where the unit will be, not nearest your OBS machine. You need the hostname, the port and the stream id:

srt://srt.sfj.irl.ac:4001?streamid=live/YOUR-STREAM-KEY

Regions are sfj, fin, ord, hil and sgp, and the endpoint answers in all of them, so travelling is a hostname edit rather than a migration.

Step 2: add a custom SRT destination

In the LiveU Solo Portal, add a custom destination and choose SRT, in caller mode. Caller means the unit dials out to us — the only direction that works when the unit is on cellular and unreachable from outside.

Enter the hostname and port 4001 in their fields, and your stream id (live/YOUR-STREAM-KEY) in the stream id field. If the portal build you have offers only a single URL box, paste the full form above.

4001 is SRT, 5000 is SRTLA

The SRTLA port will not accept a plain SRT connection, and the failure looks like a network problem rather than a wrong number. If the destination refuses to connect and everything else looks correct, check the port first.

Step 3: set the latency to 2500 ms

SRT's latency setting is a buffer: it is how long the protocol is allowed to hold a packet while asking for a missing one again. Too small and there is no time to retransmit, so SRT behaves like RTMP with extra steps.

Start at 2500 ms. LiveU is already doing its own recovery underneath, and the number needs to cover both that and the cellular jitter below it. Once you have a stream that holds up on a real walk, SRT latency settings explains what you are trading if you want to bring it down.

Step 4: decide about HEVC

The Solo Pro can encode HEVC. At IRL bitrates that is a real gain — the same 6 Mbps carries visibly more detail than it does in H.264, which matters most in exactly the conditions IRL streams live in: motion, low light, and compression artefacts on faces.

The catch is the other end. Current OBS releases decode HEVC over SRT; older ones do not, and they fail silently with a black source rather than an error message. Test it at your desk before you rely on it in the field, and keep H.264 as the fallback if your studio machine is old.

Our SRT and RTMP endpoints accept both, so this is a decision about your OBS, not about the relay.

Step 5: assign, go live, and pull it into OBS

Assign the destination to your unit and start streaming. On our side there is nothing to enable.

In your own OBS, add a Media Source, uncheck Local File, and paste the playback URL from the dashboard. The buffering and the checkboxes that let a stalled feed recover are covered in the OBS setup guide.

Why not send LiveU straight to Twitch

You can, and for a single stable location it is fine. The reason to put a relay in the middle is your OBS: overlays, scene switching, and a connection to the platform that lives on a stable network at home rather than on the back of a bonded unit walking through a city.

Get an SRT endpoint

Add drop protection so NOALBS shows a BRB scene during a rough patch instead of letting the broadcast end.

FAQ

What does the Solo Pro do that the Solo does not?: SRT and HEVC. A LiveU Solo streams RTMP only, which means no gap tolerance and H.264 alone. The Solo Pro adds SRT, which recovers from brief losses instead of ending, and HEVC, which gets more picture out of the same bitrate. If you have a Pro, using it as an RTMP unit wastes both.
Do I configure SRTLA on a Solo Pro?: No. LiveU bonds with its own LRT layer inside the unit and sends you one already-bonded SRT stream. SRTLA is a different bonding scheme for encoders that do not have one. Point the Solo Pro at the SRT endpoint, not the SRTLA one.
Which SRT latency should I use?: Start at 2500 ms. That is enough room for LiveU's own recovery plus the cellular jitter underneath it. Lower values look attractive on paper and give SRT less room to retransmit, which is the thing you are paying for.
Will HEVC work in my OBS?: Current OBS releases decode HEVC over SRT. Older builds do not, and the failure is silent — a black source rather than an error. Test HEVC before you rely on it, and keep H.264 as the fallback if your studio machine is old.
Caller or listener mode?: Caller. The Solo Pro dials out to our relay, which is what you want on a cellular connection where nothing can dial in to the unit.