Larix Broadcaster can publish over SRT, but choosing an SRT mode does not automatically connect the app to YouTube. Before entering settings, check the protocol and endpoint shown for your channel in YouTube Live Control Room; use that destination directly, or send SRT to a compatible relay that republishes to YouTube.
For a 24/7 stream, the protocol is only one part of the setup. You also need a device, power supply and network connection that can sustain the chosen video and audio profile, plus a way to notice and recover from interruptions.
SRT publishing and YouTube ingest are different things
SRT describes how one endpoint sends media to another. Larix can act as an SRT publisher, but it needs a receiver configured to accept that connection. A mode such as Push (Caller) describes the connection relationship between Larix and that receiver; it does not tell Larix that YouTube is the destination.
YouTube’s current encoder guidance lists RTMP and RTMPS. The guidance is useful for the YouTube-facing part of a stream, but it is not an SRT address or a set of SRT connection details. Softvelum’s Larix documentation directs publishers to separate YouTube instructions and says to follow YouTube’s requirements. Verify the options available for the actual channel rather than inferring a direct SRT destination from Larix’s SRT support.
That distinction matters because each leg of a relayed stream has its own receiver, protocol and settings. Larix might send SRT to a receiver that accepts it; that receiver might then publish to YouTube over RTMPS. The settings for the first leg are not automatically valid for the second.
If the channel’s Live Control Room presents RTMP or RTMPS and no SRT ingest option, treat that as the destination to use for direct publishing. Do not make up an SRT endpoint, port, stream ID, passphrase or latency value. Those details have to come from a receiver that actually accepts SRT.
For a devotional channel using a phone to send a fixed camera view, this can be an easy assumption to miss: Larix’s ability to create an SRT connection does not establish that YouTube is listening for one. If you are deciding between an app-based encoder and another publishing workflow, the options for continuous YouTube streams may help clarify which part of the path each tool handles.
What Larix’s SRT modes mean
Softvelum lists Push (Caller), Listener and Rendezvous modes. These are connection arrangements between Larix and an SRT receiver. Select the mode required by that receiver and the network topology; do not choose one merely because its name sounds suitable for YouTube.
In a common contribution setup, a phone initiates an outbound connection to a server that is waiting to receive it. Caller or Push may fit that arrangement, but only if the receiver’s instructions specify it. In Listener mode, Larix waits for the other endpoint to connect. Rendezvous is intended for a different connection arrangement. The receiver’s configuration decides which one is appropriate.
The receiver must provide the actual connection information: its address and port, and any stream ID or passphrase it requires. Enter those values exactly as supplied. A stream ID can be part of identifying the receiver’s requested stream, while a passphrase may be used where the receiver requires encryption. Treat connection credentials as secrets and share them only through an appropriate channel.
SRT latency is the recovery window used to handle packet loss on the SRT leg. It is not the viewer-latency setting in YouTube Live Control Room. A larger recovery window can allow more time for recovery when a network varies, at the cost of added delay. There is no universal value to copy: use the receiver’s requirements and test against the jitter and loss on the connection you will actually use.
Bitrate and maximum bandwidth also need to suit the path. Set a video target that the device can encode and the sustained uplink can carry with headroom. Larix’s available bitrate controls differ by platform: its documentation describes a typed bitrate value on Android and predefined values on iOS. The value entered or selected is a target, not proof that the device will sustain that rate continuously.
Larix also exposes reconnect controls. Its FAQ describes a reconnect timeout and a network-presence option, with additional no-network reconnect and idle/unsent buffer thresholds on iOS. These can influence recovery behaviour, but they cannot keep a suspended app, overheated phone or failed router online. If you are using a phone for a fixed scene, a tripod mount can keep framing steady; it does not solve power, heat or network continuity.
Check the encoder protocols listed for your channel
Start from the channel’s current Live Control Room settings, not a remembered guide or a general assumption about what YouTube might support. YouTube’s stream settings help explains managing stream settings and keys. Check the channel’s available endpoint and protocol there, and compare them with the requirements of the encoder or relay you plan to use.
If the channel offers RTMP/RTMPS, use a compatible direct publishing path or a relay that can publish to that destination. YouTube recommends RTMPS in its encoder guidance. Keep the YouTube-facing protocol settings distinct from Larix’s SRT contribution settings if you use a relay.
YouTube’s published H.264 encoder table gives bitrate guidance by frame size and frame rate. For example, it lists 5 Mbps minimum and 14 Mbps recommended for 1080p at 30 fps, 6 Mbps minimum and 17 Mbps recommended for 1080p at 60 fps, and 3 Mbps minimum and 8 Mbps recommended for 720p at 30 fps. These are YouTube’s published recommendations for the encoder feed, not a guarantee that a phone running Larix will encode or upload reliably at those rates.
| YouTube H.264 example | Minimum bitrate | Recommended bitrate |
|---|---|---|
| 720p at 30 fps | 3 Mbps | 8 Mbps |
| 1080p at 30 fps | 5 Mbps | 14 Mbps |
| 1080p at 60 fps | 6 Mbps | 17 Mbps |
Choose a profile according to what your device and sustained connection can maintain, rather than selecting the highest available resolution. YouTube’s network recommendations advise leaving about 20% bandwidth headroom. That margin is relevant to the publishing connection, not just a speed-test result taken at a quiet moment. Test at the location and time where the stream will run, particularly if other people or devices share the uplink.
The YouTube encoder guidance also covers codecs, frame rate, CBR, keyframe frequency and audio. Use the current official table when setting the YouTube-facing encoder leg. Do not assume every setting transfers unchanged to an SRT contribution leg: a relay may accept different codecs or parameters, and it may re-encode or pass through media according to its own capabilities.
For music or a devotional programme, check audio as carefully as video. Use a representative passage that includes the loudest and quietest material, and listen for clipping, silence or an unexpected channel balance in the preview. The article on low audio bitrate warnings for a Telugu devotional stream offers a focused checklist for a problem that can be missed when attention is only on the picture.
Verify the intended endpoint in Live Control Room
Open the Live Control Room for the intended channel and scheduled stream. Confirm the publishing protocol and endpoint that YouTube currently presents there. If it shows RTMP or RTMPS settings, use those for the YouTube-facing connection; do not replace them with an imagined SRT destination. If the interface offers a different option, follow its current instructions and verify that the encoder or relay explicitly supports that option.
A YouTube stream key is credential information used by an encoder to deliver a feed. Handle it as a secret: avoid including it in screenshots, public chat, or a URL shared without care. If it is exposed, use Live Control Room to manage or reset it. A YouTube key is not the same thing as an SRT receiver’s stream ID or passphrase, and copying one into the other field will not make the protocols compatible.
Check that the selected Live Control Room event, channel and stream key belong together. A technically valid connection pointed at the wrong channel or event can produce a confusing result. Before a planned broadcast, inspect the preview and stream health indicators with the intended account open, and make sure the content shown is the content you mean to send.
YouTube’s viewer latency and SRT’s recovery latency are separate controls with different effects. The former concerns how quickly viewers receive the live programme; the latter affects recovery behaviour on an SRT contribution connection. Adjusting one does not set the other, and neither replaces checking the endpoint and protocol.
If you are moving from a file-based loop or computer encoder to a phone, review how OBS looping can stop during a church stream for a reminder that a continuous programme can fail for reasons outside the connection protocol. Keep the key private while testing, and do not treat a successful preview as a permanent guarantee.
Choose direct RTMPS or an SRT relay
There are two practical paths when YouTube’s channel settings show RTMP/RTMPS. If Larix can publish directly using a protocol and settings that match YouTube’s current instructions, a direct connection has fewer components to configure. If your workflow specifically needs SRT contribution, use a compatible receiver or relay that accepts SRT and can then publish to the verified YouTube endpoint.
| Consideration | Direct publishing to YouTube | SRT to receiver, then YouTube |
|---|---|---|
| Protocol match | Encoder must match the channel’s listed ingest protocol | Receiver must accept the SRT mode and settings; onward leg must match YouTube |
| Components to monitor | Larix, device, network and YouTube preview | Those components plus receiver or relay and its onward publishing leg |
| SRT recovery controls | Not used for a direct RTMP/RTMPS path | Can be tuned for the contribution leg to match receiver requirements and network conditions |
| Troubleshooting | Fewer hand-offs, so fewer places to check | More control over the contribution leg, but more configuration and failure points |
A relay is not automatically more reliable. It adds another system and another connection to monitor, though it can be useful where SRT is required between the phone and a receiver. Confirm that the relay supports the exact SRT mode, stream parameters and media format you plan to send, and that it can publish to the protocol YouTube lists for your channel. Do not rely on a product description that does not specify those capabilities.
Direct RTMPS is often the simpler choice for a phone that has a stable internet connection and does not need an SRT contribution leg. A relay can make sense when the receiver is part of an existing production workflow or when the contribution network needs SRT’s recovery behaviour. Decide based on the actual endpoint, available support and who will monitor each component, not on the assumption that SRT is inherently a better YouTube destination.
For a small business or study channel that intends to run a pre-recorded programme around the clock, a mobile app may not be the best way to keep a phone continuously encoding. If the operational problem is leaving a computer and phone running overnight, StreamNeo can remove that particular burden by taking an uploaded video and publishing it as a YouTube live stream while your computer is switched off. It does not change YouTube’s protocol requirements or remove the need to verify the channel and content.
Test the complete publishing path
Test with the same device, power source, network and content type you plan to use. Include the audio and movement that will actually appear in the programme. A static test image can conceal encoding or bandwidth problems that become visible when the scene changes, and a quiet audio sample will not expose every level issue.
For direct publishing, check that Larix is configured for the verified YouTube destination, then watch the Live Control Room preview and stream health before relying on the stream. For an SRT relay path, test both legs: confirm that the receiver accepts Larix’s SRT connection and that its onward feed reaches the intended YouTube event. A connection indicator on the phone alone does not prove that viewers are receiving the expected programme.
Make one change at a time when diagnosing a failure. If the receiver cannot connect, check the mode, address and receiver-provided parameters before changing bitrate. If YouTube does not show the relay’s feed, verify the onward protocol, stream key and event. If the preview appears but reports a health issue, check the encoder settings and available uplink against YouTube’s guidance. Keep a short note of the last known-good settings so a hurried adjustment does not create a second problem.
Then test interruption and recovery. Observe what happens when the network briefly drops and returns, and whether the device, Larix, receiver and YouTube feed each resume as expected. Larix reconnect options may help, but they do not guarantee an unattended recovery in every operating system or network condition. A mobile device may lose connectivity, become too warm, run short of power or have its background activity restricted.
For a true 24/7 goal, plan around those limits. Use device-compatible continuous power, check the device’s behaviour during extended operation, and consider a wired or otherwise stable network where practical. Decide who will check the stream, how they will know it has stopped, and what alternate source or restart procedure is available. YouTube’s network advice encourages testing before going live; an overnight test is more informative than assuming a short successful preview proves long-run stability.
A continuous channel also needs a content plan and a recovery plan. If you are comparing a phone workflow with a dedicated loop, the guide to running a continuous FFmpeg YouTube stream with Docker covers a different operating approach. Neither approach removes the need to test the publishing path, check the current YouTube endpoint and monitor the actual stream.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
Can I send SRT directly from Larix to YouTube Live?
Do not assume so from Larix’s SRT support. YouTube’s current encoder guidance lists RTMP/RTMPS; check the protocol and endpoint shown for your channel in Live Control Room. If that is the only supported destination shown, publish directly using a compatible path or send SRT to a compatible relay that republishes to YouTube.
Which Larix SRT mode should I choose?
Choose the mode required by the SRT receiver and its network setup. Caller/Push is a common fit when the phone initiates an outbound connection to a receiver, but it is not universal. Obtain the mode and connection details from the receiver rather than guessing.
What should I set for SRT latency?
Use the receiver’s requirements and test against the loss and jitter on the contribution network. SRT latency is a recovery window on that connection, not YouTube’s viewer-latency setting. There is no single value that is right for every route.
Does Larix reconnect make a phone suitable for unattended 24/7 streaming?
Reconnect controls can help the app respond to a lost network, but they do not guarantee uninterrupted operation. Power, heat, app suspension, device behaviour and network availability remain separate concerns. Test the full path for an extended period and plan how someone will monitor or restart it.