Larix Screencaster 4+

Stream SRT/RTMP/Zixi/WebRTC

Furtree Systems, Inc.

Designed for iPad

    • 3.1 • 15 Ratings
    • Free
    • Offers In-App Purchases



Larix Screencaster allows streaming the content of your screen via SRT/RTMP/Zixi/WebRTC/RTSP/RIST

Larix Screencaster can live stream your device' screen content.

~ RTMP/RTMPS streaming
~ SRT streaming in Caller (Push), Listener and Rendezvous modes, SRT library version 1.5.0.
~ Support WebRTC via WHIP signaling for streaming to Twitch and other protocols
~ HEVC over RTMP via Enhanced RTMP spec
~ RTSP/RTSPS support

New: ~ Zixi protocol support to deliver live streaming with full set of advanced transmission techniques, with AVC/HEVC codecs, SEI timestamps and Grove support.

~ Live H.264/AAC encoding
~ HEVC/H.265 encoding for SRT, RTMP, RIST, RTSP
~ RIST protocol streaming in Push mode: RIST Main Profile via libRIST version 0.2.7
~ Larix Grove support for easy links distribution via Grove links import.

To set up iOS screencasting please refer to these docs:
~ - Apple Support article
~ - Apple Support video
~ - our video showing in-app streaming setup

Screencaster Premium via in-app subscription is required to stream more than 5 minutes

~ ABR (adaptive bitrate) is available in 2 modes:
- Logarithmic descend - gracefully descend from max bitrate down step by step. Retries to raise back to previous step every minute. Best fit for good networks.
- Ladder ascend - first cut bitrate by 2/3 and increase it back to normal as much as possible. Retries to raise back to previous steps in 15 seconds, 1.5 and then 5 minutes. Best fit for networks with big losses.
- Variable FPS can be used as an option, it will reduce bitrate by decreasing FPS in addition to changing the bitrate value. Notice that it heavily depends on your device' capabilities and may not work on some hardware.
This feature is disabled by default. It's enabled in Video menu.

~ Streams to any media server like Nimble Streamer, Wowza Streaming Engine™, Red5, Flussonic or any other capable of RTSP, RTMP and SRT input.
~ Streams to Facebook Live, YouTube Live, Twitch and many other services capable of receiving RTMP(S).
~ Multiple simultaneous connections support - add several connections profiles and choose up to 3 connections for simultaneous streaming, E.g. stream to Nimble Streamer, YouTube and Twitch.
~ With 5G technology, multi-point publishing allows easily delivery to multiple points.
~ Limelight authentication support - publish your streams directly into Limelight CDN for further delivery.
~ Akamai / Dacast authentication support - publish streams to any Akamai-powered CDN like Dacast.
~ Support for Periscope Producer - choose correct Target type when creating connection.

You can browse full document reference for all details regarding setup, usage, streaming to popular platforms like Facebook Live, YouTube Live and other targets:

If you'd like to use our RTSP/RTMP/SRT streaming library in your own app visit our web page to get streaming library and SDK.

Larix Screencaster uses Apple’s Standard License Agreement (

What’s New

Version 1.2.1

~ The application now has a free limit of 5 minutes of streaming. You need to subscribe for Screencaster Premium in-app subscription to remove the limit.
~ Support streaming HEVC over RTMP via Enhanced RTMP spec to YouTube and other destinations with RTMP HEVC support
~ Support Zixi streaming protocol
~ Support WebRTC via WHIP signaling for streaming to Twitch and other WHIP-powered destinations

Ratings and Reviews

3.1 out of 5
15 Ratings

15 Ratings

undeRatedtv ,

No sound with SRT?

Picture looks good when I stream to castr But there is no sound. I can use RTMP on other apps and I have sound

Developer Response ,

Unfortunately iOS doesn't allow getting apps' audio, check Q23 in our FAQ

CyberneticSubnet ,

Cannot setup.

The apple video explaining how to set this up is private and cannot be viewed. The video showing the button to stream does not explain how to make that button appear and the button never shows up. Cannot start stream because of this.

Developer Response ,

Please check our docs reference here to learn more about launching screencasting under iOS

unclebill2000 ,

Doesn’t work, support videos show a different version

Apples support video has been privated. The one that the app shows has a totally different UI that allows them to start a stream. This app doesn’t have any option to start a screencast.

Developer Response ,

We'll try to update our video. Anyway, the screencasting needs to be started from iOS, not from our app.

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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