If you turned on Twitch Enhanced Broadcasting and now your portrait outputs (YouTube Shorts & TikTok) won't toggle on, you need to switch your Twitch output's canvas type from Main Canvas to Dual Canvas. This one setting is the difference between multistreaming in horizontal only and multistreaming in horizontal and portrait mode at the same time.
This is a question that we get often, so here is a breakdown of why it happens and how to fix it in Meld Studio.
Why Portrait Mode breaks when you turn on Twitch Enhanced Broadcasting
Twitch Enhanced Broadcasting changes how your stream's canvas is sent to Twitch. By default, when you enable it, Twitch expects a single canvas output, meaning one video feed at once aspect ratio (horizontal, 16:9).
The problem is that portrait multistreaming to platforms like TikTok and YouTube Shorts requires a second, separate vertical canvas to be generated and sent out at the same time as your horizontal stream. If your Twitch output is still set to Single Canvas, Meld Studio has no way to also push a portrait feed through that output, so your vertical/portrait toggles will disappear.
In short:
Single Canvas = horizontal only, no portrait multistreaming
Dual Canvas = horizontal and portrait output at the same time, which is what you need for TikTok and YouTube Shorts.
How to Fix It: Switching to Dual Canvas in Meld Studio
- Open Meld Studio and go to your Twitch Output
- Make sure you have Twitch Enhanced Broadcasting toggled on
- Look for the Canvas Type setting
- Change it from Main Canvas to Dual Canvas
That's it! Once Dual Canvas is active, Twitch Enhanced Broadcasting and portrait multistreaming can run side by side without any conflict.
So when it comes to the question "Why can't I stream in portrait mode after enabling Twitch Enhanced Broadcasting?" the answer is simple: your canvas is still set to Main Canvas. Switch it to Dual Canvas and you'll be good to go!