Larix Broadcaster 4+


Furtree Systems, Inc.

    • 4.4 • 91 Ratings
    • Free
    • Offers In-App Purchases



Larix Broadcaster is SRT / WebRTC / RTMP / NDI / RTSP / RIST streaming camera app for remote contribution

Larix Broadcaster allows streaming video and audio live content from mobile device for real-time remote contribution.
~ SRT streaming in Caller (Push), Listen and Rendezvous mode, libsrt version 1.5.0
~ RTMP and RTSP streaming
~ WebRTC support via WHIP signaling
~ NDI®|HX2 support: preview stream, Discovery Server, metadata setup, handle zoom from NDI Studio Monitor
~ SSL support for RTMPS/RTSPS
~ RIST protocol streaming in Push mode: RIST Main and Simple profiles via librist version 0.2.7
Watch tutorial on connections
~ Multiple simultaneous connections support: add several connections profiles and choose any of them for parallel streaming.
~ Pause the stream: long tap on Start will pause the stream without disconnecting it, video track will contain a black screen, audio track will contain only silence.
~ Stand-by stream mode: when stream is stopped, long-tap to start a stream in pause mode with separate set of overlays.
~ Watch video tutorial on overlays, pause and stand-by:
~ Talkback for getting audio return feed via SRT, RTMP, Icecast and SLDP. Read more here:
~ UltraHD resolution support.
~ Dolby Vision HDR support (Settings / Video / HDR video menu)
~ Front and back cameras are supported with hot flip.
~ Landscape and portrait mode with live rotation.
~ Multi-camera capture with picture-in-picture and side-by-side on XR, XS and later devices.
~ Dual/Triple camera system support, including wide-angle and telephoto camera.
~ Center stage for iPads, enabled as described at
~ Audio-only capture support: disable preview, stream from background, no video in output stream. Use Audio menu in Larix settings to enable.
~ Autoexposure lock, white balance lock, manual color temperature in Quick settings.
~ Saving to MP4, making screenshots, iCloud support
~ Recording "Compatibility" option in case resulting file has black frames at preview.
~ Record with different parameters like larger resolution
~ Bluetooth audio.
~ Input audio gain control and source selection.
~ Pinch-to-zoom, all iPhone 11 cameras are used.

- H.264 encoding for all protocols including WebRTC
- HEVC/H.265 encoding for SRT, RIST, RTSP
- HEVC over RTMP is supported using Enhanced RTMP spec
- AAC audio, except for WebRTC
- Opus audio for WebRTC

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

Some of the features are available via in-app subscription:

Larix Grove can be used for easy links distribution via deep links / QR codes.

Overlays support:
~ Define image layers with external URL and local images
~ Assign layers for all mode: streaming, pause and stand-by
~ Define text and web overlays (web widgets)
~ Date/time support in overlays as defined in Unicode LDML
~ Enable layers on-the-fly
Watch video tutorial on overlays:

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:

~ Streams to any media server like Nimble Streamer, Wowza Streaming Engine, Red5, Flussonic or any other
~ Streams to vMix, OBS Studio and other desktop software
~ Streams to Facebook Live, YouTube Live, Twitch,, Dacast and other live services
~ Streams to Cloudflare Stream via SRT, WebRTC and RTMP

Join our public beta testing to get new updates among the first:

Full reference of docs regarding setup and usage:

Also, visit our website to get Larix streaming SDK.

Larix Broadcaster uses Apple’s Standard License Agreement (

What’s New

Version 1.4.2

- HEVC can now be delivered via RTMP with Enhanced RTMP spec.
Such streams can be received by YouTube, Nimble Streamer and other platforms supporting this spec.
Available via Larix Premium subscription for $9.99/m.

- Some of the professional features are also available via Larix Premium now.
See app description page for details.

Ratings and Reviews

4.4 out of 5
91 Ratings

91 Ratings

Dave Grodzki ,

Fantastic Restream Integration & Wonderful App

Every once in a great while you stumble across an app that just comes out of the gate doing everything nearly perfectly, and this is one of those apps. After live-streaming music from a full desktop setup for a few months due to quarantines I was looking for a way to take my multi-platform streaming solution back out to live gigs with the same improved audio & video quality I was able to achieve in a studio setting.

Many other apps and in-platform streaming solutions exist but provide limited functionality over video resolution, audio interface selection and encoding, etc. Larix allows me to do absolutely everything I did in the studio, including using a stereo external USB audio interface, customizing resolution and bitrate, recording locally, and streaming to multiple platforms. Literally the ONLY change is a step down to an iPhone camera from a full external DSLR, and that is absolutely incredible.

I cannot say GOOD JOB loud enough with this one, and I can’t wait to see where the team goes from here!

Thanks for making this.

Developer Response ,

Dave, thank you so much for a great review! Our team wants Larix to become full featured camera for remote production "on-field" streaming so if you have any thoughts on how we could make it better, just let us know via . Thanks!

J hillio ,

Quiet but mighty!

First for the developer: Can you add a switch to disable the iPhone’s image stabilization? I am streaming from a moving vehicle, and the smallest windshield vibration causes the stabilization to over correct resulting in jello. (It’s the phone not the app)

I don’t know what else to say about this app, but it just does what it is supposed to. No gimmicks, no problems, just runs perfectly for hours on end. I used it with an iPhone 6 for 8hrs a day over 10 days to feed live storm chase video online. Flawless.

Developer Response ,

Thank you for your feedback! We'll check the stabilization option.

Jason G Trusty ,

Audio issues with recent update

Long time user and huge fan of this excellent application. That said, with one of the recent updates, we are now experiencing audio anomalies that are not hardware related. We use Larix and Facebook live to stream our services and there is now a loud distortion/popping anomaly that occurs with increasing frequency the longer the stream runs. Not sure how to proceed in isolating the problem and was not able to locate a proper channel to reach support. Any advice would be appreciated.

Developer Response ,

Can you please report us with more details via ?

App Privacy

The developer, Furtree Systems, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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