FlowCaster RTMP Quick Start

FlowCaster SwirlFlowCaster Quick Start for RTMP.  This article explains how to setup and test the FlowCaster output with streaming services like flowcaster.live, youtube.com and twitch.tv.

FlowCaster Quick Start - RTMP

FlowCaster supports local and internet based RTMP sharing sites like flowcaster.live, youtube.com, twitch.tv and many others. This quick start will connect Avid’s Media Composer’s output to youtube.com.

Start by logging into youtube and selecting Go Live from the upper right

 1 GoLive

That will bring up the time to stream dialog

 2 When

Select Right now’s START button. That will bring up the source selection dialog.

 3 How

Select Streaming software and click GO. This will bring up the live streaming page.

4 YouTube Studio

To connect your stream, you will need two things

1. The server URL (rtmp://a.rtmp.youtube.com/live2)

2. The secret Stream Key (hidden under the dots)

To create the URL for FlowCaster, take the server URL, add a / to is and append the stream key, for something like this


To start streaming, run MediaComposer and load your project. To enable digital outputs, click on the button in the red box, so that is flashes red.

 5 Avid MediaComposer

To make sure you are transmitting using FlowCaster, left click on that same button and make sure FlowCaster is selected in the pop up menu.

 6 VideoOutputSelect

To configure FlowCaster, select the menu Tools | Video Output Tool (please note, this menu is only present with the video output is enabled with the button above).

 7 VideoOutConfigMenu

This will bring up the FlowCaster configuration dialog.

 8 FlowCasterConfig

Set the following settings:

Transmit Type: RTMP

URL: rtmp://a.rtmp.youtube.com/live2/<your secret key>

Compression: h.264/AVC1

Structure: IPPP

Bit Rate: 2500

Audio Mode: Stereo

Click Ok to close the configuration dialog, and then click


twice (off and then back on) to pick up the new configuration. After a short while, the stream should appear on youtube.

 9 YouTube Studio Live

And can be shared publicly or privately to as many people as you wish.

To transmit to Twitch.tv is similar, except they have dedicated servers for each region that you can find here:


to be combined with your secret twitch key as described above.