StreamLive ProStream from an ATEM Mini to several networks at once
Stream from an ATEM Mini to several networks at once: as a USB webcam into the browser studio, or straight over Ethernet with a custom streaming service.
An ATEM Mini can feed StreamLive Pro in two ways. Every ATEM Mini model works as a USB webcam, so you can pick it as a camera in the Browser Studio and go live to all your channels from there. The ATEM Mini Pro and Extreme models can also stream by themselves over Ethernet; to reach StreamLive Pro that way you add a custom streaming service to the switcher and paste the address and key from the Encoder card. Either way the ATEM sends one stream, and our servers send it on to each network.
The general rules for any RTMP device are in Connect Streamlabs, Larix or a hardware encoder by RTMP. This page covers what is specific to the ATEM, with every switcher fact taken from Blackmagic's own manual (ATEM Mini Operation Manual, June 2026 edition, checked 5 November 2026).
Which way to choose
| Feature | USB webcam into the browser studio | Direct streaming over Ethernet |
|---|---|---|
| ATEM models | Every ATEM Mini | ATEM Mini Pro and Extreme models |
| StreamLive Pro plan | Any plan, including the 7-day trial | A paid plan (encoder ingest) |
| What you need on the computer | A browser with the studio open | Only ATEM Software Control for the setup |
| Graphics, guests, lower thirds from StreamLive Pro | Yes, on top of the ATEM picture | No, the ATEM program goes out as it is |
| Computer can be switched off during the show | No | Yes, after the setup |
If you want StreamLive Pro's lower thirds, remote guests or a second camera next to the ATEM, use the webcam way. If you want the switcher to stream with no computer in the chain, use Ethernet.
Before you start
- Channels connected. Connect YouTube, a Facebook Page and the rest under Connections. Instagram and TikTok need a fresh key before every live (Live on Instagram and TikTok with a stream key).
- For Ethernet: a paid plan. In the 7-day trial the Encoder card shows that RTMP and OBS are on paid plans, and the trial streams from the browser studio only. See the pricing page.
- ATEM Software Control installed and the switcher updated, from Blackmagic's support site.
Steps
- Pick your way. For the webcam way, connect the ATEM's USB-C port to the computer; Blackmagic's manual says the switcher then appears to the computer as a webcam named Blackmagic Design. For Ethernet, connect the switcher to your router with a network cable.
- Webcam way: open the studio. Click New stream and choose Browser Studio. Add a camera input and pick Blackmagic Design from the list, together with its audio if your sound comes through the switcher. Tick your channels and go live from the studio. Multi-camera tips are in How to live stream with several cameras.
- Ethernet way: open the Encoder card. Click New stream and choose Stream from software like OBS (RTMP / SRT). Open the RTMP tab and copy the address and the stream key with their copy buttons.
- Add StreamLive Pro as a streaming service. The ATEM's Platform menu lists only the services in its streaming settings file. Blackmagic's manual describes an XML file with additional settings that lets knowledgeable users add other streaming services, and a "load streaming settings" command in ATEM Software Control's Stream menu that adds a service from such a file to the Platform menu. Put the RTMP address from step 3 in the service's server entry, leave the key out of the file, and load it.
- Select the service and paste the key. In ATEM Software Control, open the Output palette, then Live Stream. Choose your new service in Platform and paste the key from the Encoder card into Key. The switcher stores these settings, so they survive a power cycle.
- Choose the quality. Streaming High, Medium or Low. The manual gives 6 to 9, 4.5 to 7 and 3 to 4.5 Mb/s; the lower number applies at 24, 25 and 30 fps, the higher at 50 and 60 fps. All three sit inside the 2 to 14 Mbps that our ingest accepts (Cloudflare Stream: Start a live stream). Pick one your upload holds with room to spare.
- Tick your channels and press On Air. In StreamLive Pro switch on the destinations in the Channels list and keep the page open. Then press On Air in ATEM Software Control or on the switcher. Within about ten to thirty seconds StreamLive Pro shows that the stream was detected and sends it to the ticked channels.
- End from StreamLive Pro. Press Stop stream to end the live on every network, then press Off on the switcher.
What we have not checked
We have not tested a specific ATEM firmware against StreamLive Pro, and Blackmagic's manual does not state the keyframe interval the switcher uses or whether its custom services accept rtmps:// addresses. Use the RTMP tab, and before an important show run a test with color bars or a standby graphic, as the manual suggests, and watch for the detection message in StreamLive Pro.
What can go wrong
| Symptom | Fix |
|---|---|
| Your service is not in the Platform menu | The settings file was not loaded, or ATEM Software Control needs a restart after loading it |
| On Air, but StreamLive Pro never detects the stream | The key is from another broadcast, or the address has a typo. Copy both again from the card you have open |
| Works at the office, not at the venue | Port 1935 is blocked there. Use the webcam way through the browser, which needs no extra port |
| Detected, but the picture stutters on every network | Choose a lower Streaming quality |
| The webcam is missing in the studio | Another app (Zoom, OBS) holds it, or the browser has no camera permission. Close the other app and allow the camera |
More checks: My encoder says it is streaming, but there is no picture.
Frequently asked questions
Can the ATEM Mini stream to YouTube and Facebook at the same time?
Not by itself; it streams to one service at a time. Send that one stream to StreamLive Pro and our servers deliver it to every channel you ticked.
Does the basic ATEM Mini work with StreamLive Pro?
Yes, as a USB webcam in the browser studio. Direct streaming over Ethernet is on the Pro and Extreme models only, according to Blackmagic's manual.
Can I use the ATEM during the 7-day trial?
Yes, as a webcam in the browser studio. Sending from the switcher straight to the Encoder address needs a paid plan.
Which StreamLive Pro tab do I use for the ATEM?
The RTMP tab. Copy the address into the service's server entry and the key into Key in ATEM Software Control.
Do I need to enter the key again for every show?
The switcher keeps the key it was given. If you start a different broadcast in StreamLive Pro, compare the key on its Encoder card with the one stored in the switcher and paste the new one if they differ.
Keep reading
Send Wirecast's program to StreamLive Pro through an RTMP Server output and reach YouTube, Facebook Pages and more with one upload: Address, Stream, settings and fixes.
Connect Ecamm Live to StreamLive Pro over RTMPSAdd StreamLive Pro as an RTMP destination in Ecamm Live on the Mac and send one stream to YouTube, a Facebook Page, Twitch and more: fields, settings, fixes.
Live stream checklist: before, during and afterA printable live stream checklist: test broadcasts, stream keys, sound check, backup internet, what to do if the stream drops, and the work after it ends.
Upload speed and bitrate for multistreamingYouTube's bitrate table for 720p to 4K, the upload you need to multistream from OBS vs a relay, CBR and 2-second keyframes, and how to test your connection.
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