Larix Broadcaster

Furtree Systems, Inc.

About this app

Larix Broadcaster is freeware, simple and powerful app for remote video and audio contribution.
It allows streaming live content from your mobile device in real-time over WiFi, 3G, LTE, 5G via SRT/WebRTC/RTMP/RTSP/RIST.

~ SRT streaming: Caller (Push), Listen, Rendezvous modes, libsrt version 1.5.0
~ RTMP/RTSP streaming
~ RTMPS/RTSPS streaming over SSL
~ RIST protocol: Push mode with RIST Main and Simple profiles, librist version 0.2.7
~ NEW: WebRTC support with WHIP signaling.
~ Multiple simultaneous output connections
~ Talkback: get audio return feed via SRT/RTMP/Icecast/SLDP https://softvelum.com/larix/talkback/
~ Pause streaming: long tap on Start pauses the stream without disconnect; video is black screen, audio is silence
~ Stand-by stream mode: when stream is stopped, long-tap to start a stream in pause mode with separate set of overlays
~ Audio-only mode: no video capture, works in background; use Setting -> Audio menu
~ AVC/H.264 and HEVC/H.265 encoding with AAC audio
~ HEVC over RTMP as a non-standard feature
~ Landscape and portrait, live rotation, "always horizontal" and "always vertical" modes
~ Front and back cameras hot switch
~ Multi-camera support on supporting Android 10+ devices
~ Concurrent cameras support for Android 11+: side-by-side and picture-in-picture streaming from front & rear cameras simultaneously. Requires devices which support concurrent camera usage, like Google Pixel 5
~ Audio gain control and audio source selection
~ Larix Grove: easy links distribution via deep links and QR codes https://softvelum.com/larix/grove/
~ Saving to MP4, splitting videos into sections, making screenshots
~ White balance, exposure, anti-flicker, video encoder profiles, FPS selection
~ Video stabilization on supporting devices
~ Input audio gain control
~ Background option: keep streaming with display turned off or while not in focus. Enable it in Settings / Advanced options / Background streaming.
~ 60FPS support: most devices with 60FPS cameras don't provide this capability to third-party apps. So if your device has that support, we do not guarantee Larix to provide it.

Insert SEI metadata for time sync up, along with specifying NTP server. Enabled in Advanced menu.

WebRTC is support with WHIP signaling.
~ H.264/VP8 video with Opus audio content is generated.
~ Tested with Nimble Streamer, Cloudflare Stream and Dolby.io.

Adaptive bitrate (ABR) is available with logarithmic descend, ladder ascend, hybrid approach for SRT and variable FPS. It's disabled by default, check Video menu to use. Learn more in Q11 here: https://softvelum.com/larix/android/#qabr

Overlays and widgets support:
~ Image layers
~ Web widgets
~ HTML layers and custom CSS
~ Text and date/time layers.
~ Assign layers for all mode: streaming, pause and stand-by
~ Enable layers on-the-fly

JOIN BETA program to get new features first!

~ Streams to any media server like Nimble Streamer, Wowza Streaming Engine, Red5, Flussonic or any other.
~ Streams to vMix, OBS Studio and ortther desktop software.
~ Streams to Facebook Live, YouTube Live, Twitch, Restream.io, Limelight CDN, Akamai, Dacast and other services via supported protocols.

Supports UVC via USB OTG
1. Enabled in Advanced settings / USB Camera
2. Enable the feature
3. Tap ON/OFF button first to initialize USB camera
Learn more: https://softvelum.com/larix/usb/

Check more docs, tutorials and videos:
~ https://softvelum.com/larix/android/
~ https://softvelum.com/larix/docs/
~ https://softvelum.com/larix/faq/
~ https://www.youtube.com/playlist?list=PLRDQWjeuSAkMro2V0BPXuw1tz8bu7MpUH

Want to create your own app based on Larix Broadcaster? Buy Larix SDK: https://softvelum.com/larix/android_sdk/

Ratings and reviews

Best Superuser Broadcasting app! I have been trying to come up with solutions for my client to live stream multiple cameras from Android phones to an rtmp relay server, and this app has been the most stable, intuitive, and easy to setup on multiple devices. Runs for hours without crashing. I'm so impressed with all the features a free application can provide. Thank you!

I've used this now for a few weeks to stream our church service and have gotten positive feedback from people who have tuned in to the livestream. The only thing I would like to see is some indication of whether it is using the external mic or the built-in mic. I am feeding the sound to my phone from an aux port on our sound board and my Pixel 3a does not always detect the line plugged into the headphone jack as a microphone. So, the only way to tell is by monitoring the livestream on a separate device to see what it sounds like. It would be nice if there was some way to indicate which mic was being used for the audio. Or, a setting that forced it to use ONLY the external mic (rather than use external mic if available). Then, if I am not getting any sound level indication on the screen, I would know that it is not detecting the external mic. Thanks for the great app!

By far the best way to stream out video and audio from the phone via RTMP or any other transport. I have only one wish... I wish it could detect and use my USB HDMI interface. Giving this app the ability to switch between all my cameras including the USB would make it quite possibly the best camera app on the market... Also giving it screen capture abilities would be nice but not as high a priority for me.

What's new

~ WebRTC support with WHIP signaling.
~ H.264/VP8 video with Opus audio content is generated.
~ Tested with Nimble Streamer, Cloudflare Stream and Dolby.io.
~ Read SRT params from imported URL's query
~ Fix recording start