Efficient products for your streaming infrastructure

Larix mobile streaming

Apps and SDKs for capturing and streaming from mobile devices

Softvelum provides a set of tools for creating user-generated mobile media.

Larix streaming library

Mobile streaming library provides transmission from mobile.

  • The content is encoded in H.264 (AVC) and H.265 (HEVC) video with AAC audio.
  • Streams can be delivered via RTMP/RTMPS, SRT and RTSP/RTSPS. Also, HEVC over RTMP transmission is supported as a non-standard experimental feature.
  • Multiple simultaneous connections allow streaming to several destinations at the same time.
  • You can stream to services like Facebook Live, YouTube Live, Twitch, Wowza Streaming Cloud, Akamai, Dacast as well as media servers like Wowza, Nimble Streamer, Red5 and others. Check docs reference for more examples.

Adaptive video bitrate (ABR) is supported in 3 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.
You can read Q6 in SDK FAQ to learn more technical details.

Larix Broadcaster free app

Larix Broadcaster

Larix library streaming capabilities are used in free fully-functional Larix Broadcaster apps.
Larix Broadcaster uses full power of mobile devices cameras, basic features include:

  • Landscape/portrait orientation.
  • Live rotation support.
  • Front/back cameras hot switch.
  • "Always vertical" and "Always horizontal" modes support.
  • Content recording and screenshots saving support.
  • Other platform-specific features like OTG USB and background streaming are listed on Android and iOS pages.

With Larix Grove format you can easily distribute your connection and encoder settings via deep links and QR codes.

Get it on Google Play

Active Larix Broadcaster user? Check Larix SDK below.
Need custom app based on Larix Broadcaster? Larix sources are included in Larix SDK.


Larix Broadcaster usage is mentioned by a number of industry professionals.

Larix Screencaster free app


Both Android and iOS allow capturing the screen of user device, so Larix Screencaster captures it and uses streaming capabilities of Larix library to encode and stream it.
All protocols and codecs of Larix Broadcaster are available for Larix Screencaster.

Read Larix iOS page and docs reference for iOS Screencaster setup details.

Get it on Google Play

Larix Screencaster sources are included in Larix premium SDK package.

Get Larix SDKs

Larix premium SDK

For those who need to add live streaming functionality into their mobile apps, we provide Larix SDK.

Larix SDK includes:

  • Larix library
  • source code of Larix Broadcaster and Larix Screencaster
  • other code examples
Having our SDK, you can create your own mobile apps and customize our apps to your use cases.

Check Android and iOS platforms' pages to get more details about features.

If you are an active Larix Broadcaster user then you may consider using SDK as well.
We post our latest app versions into stores after proper testing, and as long as the apps are online, we get feedback from users to make it even better. Then several versions later we release a new SDK containing all new changes and fixes, so SDK subscribers get a top-quality solution.

Being SDK subscriber you can build your app based on Larix Broadcaster sources and publish it under your name and use in production. Once in a while you would get an update containing all features and improvements which you can safely apply. And even if you face any problem, you can always roll back and use older code until we fix issues. So it's a safe approach if you

Subscribe here for designated SDKs once you decide to go for it.

Documentation, FAQ and videos

Visit documentation reference page to learn more about Larix apps setup and usage.

Check Larix apps and SDK FAQ with most popular questions about mobile streaming technologies.

Watch our YouTube playlist with various video tutorials.

Get Larix SDKs