If your video is already saved on an Android phone, the documented Larix route is to play it on the screen and send that screen with Larix Screencaster. Larix Broadcaster is documented for live camera capture; its documentation does not establish direct playback of a local file as an input.
That distinction matters most on a low-end phone. Screen capture adds work while the phone plays, encodes and uploads the clip, and the playback app may not allow its audio to be captured. Check picture, sound, upload stability and heat on your exact device before relying on 720p for a long stream.
A local file is not the same as a camera source
Larix Broadcaster is designed to capture live media and send it to a streaming destination. Softvelum’s documentation describes camera capture, audio modes and RTMP output; it does not document selecting a prerecorded local video as Broadcaster’s direct input. The supported workflow described for an existing clip on Android is screen capture using Larix Screencaster, with the clip playing in another app.
This is not merely a naming difference. With camera capture, the app takes a live image from the camera. With screen capture, Android supplies what is being displayed, and the capture app sends that as the stream. The playback app, Android version and handset all affect whether the picture and its internal audio are available to the capturing app.
Do not assume that seeing the clip on your phone means viewers will hear it. Softvelum says Android 10 can capture audio from apps that support external recording. That is a compatibility condition, not a promise that every playback app or phone allows it. You need to inspect the YouTube preview with sound on your own setup before treating this method as ready.
If you need repeatable playback for a longer channel rather than a phone-based test, the phone route may not fit. For context on a different file-based approach, see how FFmpeg can loop prerecorded videos to YouTube Live. That is a separate workflow, not a claim that you need to use it or that every computer-based setup is simpler.
Check the phone before you configure the stream
Start by checking the Android version and the device’s practical condition. Softvelum lists Android 7.0 or later as the minimum for Larix Broadcaster, but meeting an app minimum does not prove that the processor, memory, graphics and hardware encoder can sustain a 720p screen capture while another app plays video. The phone may be compatible with the app and still struggle under this combined workload.
Make a short local check before opening YouTube Studio. Play the same file you intend to stream at its intended resolution. Look for dropped frames, stuttering, audio glitches and heat. If the phone becomes hot or playback falters before streaming begins, adding capture and upload will not improve matters. Close unnecessary apps and disable interruptions that might cover the video or take focus away from playback.
Think about the screen as part of the source. Set a consistent orientation and keep the player controls, notification bar and any overlays out of the picture if possible. A notification can interrupt a clip or appear to viewers. Set a screen timeout that will not switch off the display during your test, but remember that keeping the display and encoder active uses battery and may warm the phone. Test with the phone positioned and powered as you expect to use it; do not assume a brief desk test predicts an overnight run.
Check available upload bandwidth on the network you will actually use. YouTube says the available upload bandwidth needs to accommodate the stream bitrate and recommends testing speed. A strong download result is not enough: you need a stable upload path. If Wi-Fi varies from room to room, try the intended location rather than measuring beside the router and then streaming elsewhere. A mobile connection can also change with coverage and congestion.
For a phone-based channel in India, this can matter when a household connection is shared or mobile coverage changes indoors. Do not plan around a single speed-test result; the YouTube stream-health display during a test is a more relevant check of the actual feed. If your goal is an always-on archive or radio station rather than a single clip, the trade-offs differ from a phone session; this guide to starting an always-on YouTube channel with prerecorded videos in India covers that broader operating question.
Create or schedule the YouTube Live stream
In YouTube Studio, create or schedule an encoder-based live stream, then open Live Control Room. YouTube provides a server URL and stream key for the encoder connection. Choose the intended stream settings and make a note of the URL and key without sharing them publicly. Treat the key like a password: anyone who obtains it may be able to send a broadcast to your stream.
YouTube’s encoder settings guidance recommends RTMPS, an encrypted extension of RTMP. Use the RTMPS server URL when YouTube provides it and the Larix app you are using accepts it. If the connection does not work, verify the selected protocol and URL in both places rather than repeatedly changing unrelated video settings.
Decide whether you are scheduling an event for a particular time or setting up a stream to start manually. The exact Live Control Room prompts can depend on the stream type and account. Keep the control room open during the test so you can see whether YouTube receives the encoder feed, whether the preview appears and whether a separate step is needed to start the public broadcast.
A stream key is not the same as the public watch link. The key belongs in the encoder connection, not in a public description or message. If you paste it somewhere unintended, replace it in YouTube Studio before using the stream. Keep the watch page separate so you can check the result as a viewer without exposing encoder credentials.
Enter the stream details in Larix
In the Larix app that will send the feed, create an RTMP or RTMPS connection. Enter YouTube’s server URL and the stream key in the fields Larix provides. Softvelum describes the conventional RTMP address as the server or application URL followed by the stream name or key; follow the format shown in the current YouTube and Larix screens rather than improvising separators or pasting the key into the wrong field.
For this prerecorded screen-capture route, the relevant capture app is Larix Screencaster. Broadcaster’s camera workflow and Screencaster’s display-capture workflow are different inputs, even if connection details look similar. Check Softvelum’s Larix documentation for the current app instructions, and confirm you have created the connection in the app that is actually transmitting the screen.
Set the video output conservatively for the phone test. H.264/AVC is the straightforward baseline in Larix on Android, according to Softvelum’s Android information. YouTube’s current H.264 guidance for 720p lists 3–8 Mbps at both 30 and 60 frames per second. Softvelum’s FAQ gives 2,000 kbps as a resolution-matched 720p setting. These numbers have different purposes: the Larix figure is an app setting, while YouTube’s range is its platform recommendation. Neither proves that a particular low-end handset or network can sustain the stream.
| Choice | What the cited guidance says | What to weigh on a low-end phone |
|---|---|---|
| 720p at 30 fps | YouTube recommends 3–8 Mbps for H.264; Softvelum lists 2,000 kbps as a 720p matched setting | Lower motion demand than 60 fps, but the upload still needs to carry the chosen bitrate steadily |
| 720p at 60 fps | YouTube also recommends 3–8 Mbps for H.264 | More frames to capture and encode; test whether the phone stays smooth and cool |
| Lower resolution or frame rate | Reduces detail or motion smoothness | A sensible fallback if the preview stutters, the phone heats up or stream health degrades |
The figures above are current page values checked on 3 October 2026, not a claim about when either recommendation was first published. YouTube also recommends a two-second keyframe interval, with a maximum of four seconds, and constant bitrate encoding. Use those settings if Larix exposes them. Softvelum notes that Android devices commonly use variable bitrate and may rise above the configured value during motion; the selected number may not behave as a strict cap. If a tight ceiling is essential, a device encoder with CBR support may be needed.
Set up Screencaster to send the phone display
Open Larix Screencaster and select its screen-capture mode, granting the Android permissions it requests. Android may show a system prompt explaining that the screen will be captured. Confirm only when you are ready to transmit the intended display. Start the YouTube connection using the saved RTMP or RTMPS details and check the Live Control Room for an incoming preview.
The arrangement is usually: Screencaster sends the display, while a separate player app plays the local clip. Before the real stream, confirm that switching to the player does not stop Screencaster or disconnect the broadcast. Some Android devices restrict background activity aggressively. If the capture stops when you change apps, check the handset’s battery optimisation settings and the current Larix guidance, then repeat the test. Do not rely on a setting you have not verified in practice.
Prepare the clip and player before starting capture. Seek to the intended opening point, set repeat if you are intentionally looping, and check that the player will not show controls or pause prompts. If you are streaming one clip rather than making a loop, confirm what appears when it reaches the end. A black screen, next-video suggestion or pause screen may be what viewers see if the player stops. Plan for that transition instead of assuming a prerecorded file repeats by itself.
If a repeat channel is the objective, the choice of playback method shapes the rest of the setup. A continuous speedrun archive workflow is another example of planning around a catalogue and uninterrupted playback rather than simply starting one phone clip. Here, keep the scope narrow: verify the particular file, player, Android device and Larix Screencaster combination you intend to use.
Play the clip and prove that audio is captured
Start with a segment that contains clear speech or music as well as visible movement. Start capture, begin playback and watch the incoming preview in Live Control Room. Confirm that the picture moves, that it is framed correctly and that sound is present. If the YouTube preview is silent, do not infer that the public stream will somehow restore the audio later.
Audio is the most important device-specific check in this workflow. Android’s internal audio capture depends on Android version and whether the playback app permits external recording. The player may have sound locally while the capture feed contains none. This is why a preview check with the exact app and handset is necessary; the general availability of screen capture does not settle this question.
Keep the first test simple. Use the intended volume level, avoid Bluetooth routing unless you have a reason to use it, and listen on a separate device or through the control room preview if available. Confirm that music or speech is not clipped, muted or badly out of sync with the picture. If the sound is missing, check the playback app’s capture compatibility, Larix audio settings and Android permissions. If internal audio remains unavailable, this screen-capture method may not meet your needs; consider a different playout and encoder workflow rather than promising that another Larix setting will fix it.
Softvelum’s Android product information describes its Android app capabilities and the relevant platform considerations. Use it alongside the actual test, not instead of one. A product page can explain what an app supports in general, but your device and player determine what reaches this particular stream.
Run a short test before relying on 720p
Make a private or unlisted test stream and include the parts of the clip that represent normal use: motion, quieter passages, music or speech, and any intended loop point. Use the same phone position, network, power arrangement, player and capture settings planned for the real stream. YouTube recommends testing before an event and monitoring stream health. Watch the preview long enough to notice interruptions, audio loss and changes in connection quality.
Check stream health in Live Control Room while the test is running. If the feed drops, stutters or reports a problem, do not treat one successful start as proof of an all-night setup. Repeat the test after adjusting one thing at a time: reduce frame rate, try a lower resolution, change to a more stable network location or remove competing load from the phone. Note what changed so you can tell whether the result improved.
A lower setting is often the more useful result. YouTube’s recommended 720p range is guidance for an encoder stream, not a guarantee for a constrained phone and uplink. YouTube’s streaming troubleshooting guidance is useful when the feed has connection or health warnings. If 720p is unreliable, use the highest setting that remains stable in repeated tests, even if that means less detail or smoother motion being traded for dependable playback.
Finally, plan for the physical session. Keep the phone out of direct heat, ensure it can remain powered safely, and check that it does not dim, lock or show interruptions during the test. There is no universal battery accessory or temperature threshold that makes a low-end phone suitable; the useful evidence is whether your exact device continues playing and sending the clip without trouble. For a continuous channel, a person monitoring a phone indefinitely may be an impractical operating plan. StreamNeo removes the need to keep that phone running by turning an uploaded video into a YouTube live stream, with your computer off; that addresses the specific burden of leaving a handset awake and attended, but it does not change YouTube’s content or account requirements.
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 Larix Broadcaster open a video saved on my phone?
The available Softvelum documentation describes Broadcaster as a live capture and streaming app, not as a verified direct local-file player. For an existing clip on Android, the documented route is screen capture with Larix Screencaster while another app plays the file. Test the actual combination before relying on it.
Will Screencaster always capture the clip’s sound?
No. Android version, device behaviour and the playback app’s support for external recording affect internal audio capture. Check the YouTube preview on the phone you intend to use; seeing the video arrive is not evidence that its sound arrived too.
Is 720p guaranteed on a low-end phone?
No. YouTube’s H.264 recommendation for 720p is 3–8 Mbps at either 30 or 60 fps, while Softvelum lists 2,000 kbps as a matched Larix 720p setting. The phone’s encoder, heat and upload connection still need to be tested, and a lower resolution or frame rate may be more reliable.
Should I use RTMP or RTMPS?
YouTube recommends RTMPS for an encrypted connection. Use the RTMPS server URL if it is offered for your stream and accepted by the Larix app, and keep the stream key private. If connection setup fails, verify the URL and key fields against the current app and Live Control Room instructions.