Note: Castr has not provide direct integration in vMix at this point. So the best way to connect these programs is by using the Custom RTMP Server option.
Step 1: Open your vMix. Download the latest version here
Step 2: Select the Stream settings
Step 3: In the Destination section, select Custom RTMP Server
Step 4: Log in to your Castr account. If you don’t have an account, create a new one here.
Step 5: Open your Livestream or Multistream project. Copy the RTMP URL and Streaming Key and past onto the vMix Streaming Settings.
Step 6: Click Save and Close.
Step 7: Make sure you have your Strict CBR and Keyframe Aligned checked in your setting
All set! Now you’re connected to vMix. You’ll see the preview in your Castr dashboard.
Note: If the preview doesn’t show up, click the Stream button again to start streaming.