Larix Broadcaster and FFmpeg can both be part of a YouTube Live workflow, but they do different jobs. Larix publishes a live feed from your phone; FFmpeg reads supported inputs, can pace or encode them, and sends output to a destination.
There is no single Larix-to-FFmpeg connection that applies to every setup. Before combining them, decide where Larix sends its feed and how FFmpeg will receive it; then plan separately for looping, process recovery, network drops and the YouTube live session.
Start with the two jobs
Larix is a mobile contribution encoder: it captures video and audio on a phone and publishes them over a supported streaming connection. You might use it to show a temple event, a local market, a school programme or a small business opening. In that arrangement, the phone is the live source, and the YouTube encoder endpoint is where that source is delivered.
FFmpeg is a media tool that can read supported inputs, encode or remux them, and send an output to a streaming destination. A file-based FFmpeg workflow can pace prerecorded media in real time and repeat it if that is the intended programme. A live feed is different: FFmpeg must be able to reach the feed through an explicitly configured ingest path before it can process it.
Those descriptions do not, by themselves, establish a built-in hand-off from Larix to FFmpeg. Softvelum's Larix documentation and connection examples describe Larix publishing configurations, while FFmpeg's documentation explains its supported inputs and processing options. They do not specify one universal Larix-to-FFmpeg recipe. Treat the connection between the two as a design choice you need to document and test, not a default feature.
It also helps to define “continuous” before choosing a command. A loop can repeat a file; a supervisor can restart a stopped process; a client or output configuration may retry after a network break; and YouTube controls the live session itself. These are separate concerns, and a setting that addresses one does not resolve all the others.
Choose the ingest topology first
For a straightforward phone broadcast, Larix can publish directly to the server URL and stream key YouTube provides. FFmpeg is not required in that path unless you have a specific processing job it needs to do. This topology is easier to explain and troubleshoot because the phone is the publisher and YouTube is the destination.
If FFmpeg must process the phone feed, first identify an ingest endpoint reachable by both sides. Larix publishes to that receiver; FFmpeg reads the feed from it and publishes a separate output to YouTube. The receiver could be a properly configured contribution service or another supported ingest arrangement, but neither Larix nor FFmpeg automatically supplies a universal receiving URL merely because both applications are in the workflow. You need to verify the protocol, network reachability, credentials and input format for the actual receiver.
Draw the path before configuring anything:
| Topology | Source and route | What to verify |
|---|---|---|
| Direct mobile live | Phone with Larix → YouTube Live | Larix connection, video plus audio, phone network and YouTube health |
| Processed mobile live | Phone with Larix → configured ingest → FFmpeg → YouTube Live | How the ingest receives the phone feed, how FFmpeg reads it, and how the output recovers |
| Prerecorded loop | Media file → FFmpeg → YouTube Live | File readability, real-time pacing, loop behaviour and output reconnection |
The processed-live option adds control over the media path, but also adds another point where a feed can be lost or misconfigured. The direct path is simpler when all you need is a phone camera on YouTube. A prerecorded loop is a distinct use case: it does not require Larix unless a live phone contribution is also part of the programme.
Write down which device or service owns each connection, where the feed is received, and which component is meant to reconnect. Avoid an undocumented address such as a guessed local RTMP URL; it will not work unless a receiver is actually configured there. For a file-based channel, a separate guide to recurring streams from prerecorded videos can help you think through the programme and scheduling side, though scheduling does not itself provide recovery for a failed encoder.
Configure Larix as a mobile publisher
In YouTube Studio, create or select the live stream and copy its server URL and stream key. YouTube's guide to creating a live stream with an encoder explains where those values belong. Treat the key as a publishing credential: do not put it in a public document, screenshot or message, and replace it if it is exposed.
In Larix, create a connection for the chosen destination using the server URL and key in the fields required by the app. Softvelum's documentation gives a combined RTMP example in the form rtmp://a.rtmp.youtube.com/live2/{stream-key}. Use the secure RTMPS endpoint when YouTube provides it and the selected connection mode supports it. Do not assume the example string is the right endpoint for every event or account; use the values displayed for your stream in YouTube Studio.
Set the contribution to include both video and audio for this YouTube configuration. Softvelum notes that YouTube cannot take a video-only or audio-only stream in its example. Check that the correct camera, microphone and orientation are selected. A phone may appear to be connected while producing a silent feed, or the microphone may pick up handling noise instead of the speaker. Do a short private or otherwise appropriate test before relying on it for an event.
The phone's network is part of the production path. A stable Wi-Fi connection may work in one venue, while another location may require mobile data; either can fluctuate with congestion or coverage. If you are streaming a devotional programme from a phone, place it on a mount, power it appropriately, and check heat and battery behaviour during a representative rehearsal. These are operational checks, not guarantees that a connection will remain available.
Larix has reconnect controls, but do not infer their behaviour from their names. Softvelum's FAQ says the default does not retry when the network is offline; it also describes advanced connection behaviour and iOS reconnect timing. The exact controls and behaviour can depend on app version and device. Review the current settings on the phone and test them by interrupting the network in a rehearsal, then record what the viewer sees and how the connection returns.
Make the feed available to FFmpeg
This is the step that needs the most explicit topology. If Larix is publishing to an FFmpeg host, explain what on that host accepts the phone's contribution and how FFmpeg addresses that input. The receiving component must be configured and reachable; a command that assumes an unspecified rtmp://localhost/... input is not a working universal bridge. The sources reviewed for this workflow document Larix publishing and FFmpeg input handling separately, not a standard receiver that joins them automatically.
Before the event, confirm that the receiver is listening on the expected protocol and port, that any authentication is correct, and that firewalls or venue networks permit the route. Keep contribution credentials private. Then verify that FFmpeg can read the actual feed, including its audio and video streams, before adding output encoding or sending anything to YouTube. If you cannot establish this ingest leg and test it end to end, use a direct Larix-to-YouTube topology instead of relying on an unverified combined workflow.
A live input should be treated as live input. FFmpeg's -re option, also described as input pacing equivalent to -readrate 1, is for reading file input at real-time speed. It is not an output retry switch or a universal reconnect feature. FFmpeg warns that using low read rates on a true live or capture input can cause packet loss. Do not add -re to a live contribution simply because a prerecorded-file example uses it.
For prerecorded media, a loop option can repeat a file, while pacing prevents FFmpeg from consuming the whole file as quickly as possible. Those options solve source playback behaviour only. They do not ensure the process stays alive, reconnects to YouTube after an interruption, or keeps a YouTube event open. If your channel depends on a repeated programme, see the practical discussion of avoiding gaps between songs; playback continuity and transport recovery still need separate attention.
Send FFmpeg output to YouTube Live
When FFmpeg is the publisher to YouTube, copy the server URL and key from the selected live stream in YouTube Studio and supply them as the output destination in the format supported by your FFmpeg build. Keep the key private, including when saving a command or a service configuration. If you need to share logs for troubleshooting, remove secrets first.
Choose the output profile based on the actual input and the YouTube encoder guidance, not on a remembered tutorial command. YouTube recommends RTMPS and specifies video settings including CBR, a two-second keyframe interval (not over four seconds), and up to 60 fps. Audio should be AAC or MP3. Its current encoder settings and bitrate table varies recommendations by codec, resolution and frame rate. For example, its H.264 recommendations list 5–14 Mbps for 1080p30, 3–8 Mbps for 720p30 and 6–17 Mbps for 1080p60. These are recommendations for those formats, not a single bitrate to use for every stream.
H.264 is a practical choice when broad encoder support matters. YouTube also lists H.265 and AV1 for supported ingestion cases, but support depends on the encoder and workflow. Do not assume a phone supports a codec merely because YouTube accepts it in some circumstances; Softvelum describes HEVC over RTMP as a Larix Premium capability. Check the current app and encoder documentation before choosing a less widely supported profile.
Resolution and frame rate affect both picture detail and the required bitrate. A 1080p60 feed has different guidance from 720p30, and sending a higher rate than your actual connection can sustain may make the stream unstable. Select a profile appropriate to the source, test with movement and sound, and use YouTube's table for that exact profile. If an FFmpeg process is restreaming a file, confirm that its timestamps and audio remain in sync through a full representative section.
For an India-based channel, include the uplink and local network in the test rather than judging only by a speed test taken earlier. A shared Wi-Fi network may behave differently when other people are using it. The more relevant test is the actual route from the source through any receiver and FFmpeg output to YouTube. The guide to running an FFmpeg stream on JioFiber is useful for planning a connection-specific test, but do not treat any connection type as a substitute for checking the live route.
Plan for continuity as separate failure modes
A continuous stream is a set of behaviours you have to plan, not a command-line flag. For each failure, decide what detects it, what action follows, and whether the viewer sees a pause, slate, or ended stream. Write down who will notice an alert if the channel is unattended.
| Failure or requirement | What addresses it | What it does not address by itself |
|---|---|---|
| Repeating a prerecorded programme | File-loop handling in the playback workflow | A stopped FFmpeg process or broken output connection |
| Reading a file at broadcast pace | Real-time input pacing such as -re |
Reconnecting after a network or destination failure |
| Larix losing mobile connectivity | Tested Larix reconnect settings and a usable network | FFmpeg input recovery or YouTube session state |
| FFmpeg exiting or becoming stuck | Process supervision, alerting and a defined restart procedure | Correct input, key or YouTube configuration after restart |
| YouTube output interruption | Tested output reconnection and health monitoring | Infinite session duration or uninterrupted viewer playback |
| Live event ending | A planned YouTube session and operator procedure | Automatic continuation just because the source loops |
A supervisor can restart a process, but restarting blindly can produce repeated failures if the key, input, disk file or network is still wrong. Decide where logs go, who checks alerts, and what to do if FFmpeg repeatedly exits. For a computer-based channel, the Windows restart and resume guide offers a useful comparison for the supervision problem; its OBS-specific steps are not an FFmpeg recipe.
YouTube's setup guide says stopping content from the encoder ends a stream and notes that streams under 12 hours are automatically archived. That archive note is not a promise of infinite session duration, recovery after a dropped connection, or automatic re-opening of a live event. For a long-running channel, decide how often an operator checks the event, how the next session is started if needed, and what viewers will see during a gap. Avoid describing any setup as guaranteed to stay live.
Test the complete path and monitor health
Test the exact topology you intend to use. If the phone sends through FFmpeg, test from Larix to the configured receiver, from that receiver into FFmpeg, and from FFmpeg to YouTube. A successful Larix preview does not prove that FFmpeg can read the feed; a successful FFmpeg process start does not prove YouTube is receiving a healthy stream.
Use representative content. For a live camera, test motion, changes in lighting, microphone levels and the actual network location. For prerecorded media, test the loop boundary, audio transition and a long enough portion to expose timestamp or sync problems. YouTube explicitly advises: “Make sure to test before you start your live stream.” Monitor the stream health indicator in YouTube Studio during the test and compare it with what a viewer sees.
Test recovery deliberately, one fault at a time. Briefly interrupt the phone network, then separately test the FFmpeg input or output recovery procedure if your topology includes those legs. Confirm whether the publisher retries, whether FFmpeg continues or exits, what YouTube reports, and what action restores the picture. Do not leave a key or a live event unattended during a test that could publish unintended material.
Keep a short runbook beside the channel: topology diagram, current stream selection, where credentials are stored, how to restart each process, who receives alerts, and how to verify the stream after recovery. Do not put the key itself in the runbook. StreamNeo may remove the need to keep a personal computer running when the job is a prerecorded file turned into a YouTube stream; that is a different workflow from routing a live Larix phone feed through FFmpeg, so choose it only when that distinction fits your programme.
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FAQ
Can Larix send directly to YouTube without FFmpeg?
Yes. Larix can publish a mobile feed to the server URL and stream key for your YouTube live stream, with video and audio configured. FFmpeg is only needed if you have a specific supported input-processing or output job for it to perform.
Is there one Larix-to-FFmpeg command I can use?
No universal command is established by the reviewed sources. You first need a configured receiver for Larix's contribution and a verified way for FFmpeg to read that receiver's feed; the address and protocol depend on your topology.
Do -stream_loop -1 and -re make FFmpeg continuous?
No. A loop can repeat prerecorded input, and -re paces file input at real-time speed. Neither alone keeps FFmpeg alive, reconnects a failed output, or keeps a YouTube live event open.
What should I check if YouTube says the stream health is poor?
Compare the actual codec, resolution, frame rate, bitrate, keyframe interval and audio format with YouTube's current encoder guidance. Then check the complete route for packet loss, feed interruptions or an overloaded connection, and repeat a representative test after changing one setting at a time.