Display Stream Duration
FrameNinja allows you to create a countdown and use in different places.
Display time on stream
To display stream duration on the broadcast you can create autorun with Stream Duration variable. Open Autoruns section and click on the Plus Button.
Click on the Plus Button next to the "Variables" to create a new one and select Stream Duration type.
Then, create Set Text command with this variable
Now it will be displayed in Stream Duration text source.
Chat command with stream duration
Since you can use variables anywhere, you can create chat command, as well. Go to Events section and create On Chat Message event.
Create Send Chat Message command with our variable
Then, switch to Conditions tab. We want time to be shown only if someone writes a command !time. So, we have Message is condition for this.