> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dfine.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Blackmagic SDI monitoring

> Send the dfine.io live stream to a reference monitor over SDI or HDMI, using OBS and a Blackmagic device.

Send the dfine.io live stream to a reference monitor over SDI or HDMI, using OBS and a Blackmagic device. A Review version of this guide is coming soon.

<Tabs>
  <Tab title="Streaming Classic">
    With OBS you can play the dfine.io live stream out to a reference monitor over SDI or HDMI. There are two parts: you create a monitor link in the app, and your client plays it out in OBS.

    ## Create the monitor link

    Open your stream slot and go to the **Playout** tab. Turn on **SDI / monitor playout** to create the link.

    <Frame>
      <img src="https://mintcdn.com/dfineiogmbh/G5xSKB6elOdxLHD5/images/app/monitor-link.png?fit=max&auto=format&n=G5xSKB6elOdxLHD5&q=85&s=0e7bfb9ac994ea46731750893cef44bb" alt="The Playout tab of a stream slot with the monitor playout link enabled" width="3456" height="1872" data-path="images/app/monitor-link.png" />
    </Frame>

    The playout link is a private address to watch the stream on a reference monitor or decoder, one per slot. It skips the geo and access code checks, so treat it like a stream key. Turn it off to block the link at any time without affecting your web viewers, and back on when you need it. Use **Regenerate** to replace it.

    <Note>
      The SDI playout adds about **two to three seconds** of delay. For timing-critical checks we recommend keeping the **web viewer** open alongside it — the browser stream runs at noticeably lower latency. Use the reference monitor for colour and image quality, and the web viewer when exact timing matters.
    </Note>

    Copy the link and send it to your client, or use the email field to send it straight from the app. It follows this pattern:

    ```plain theme={null}
    rtmps://ingest-de.dfine.app:8443/live?username=ID&password=SECRET/STREAMKEY
    ```

    ## Play it out in OBS

    <Steps>
      <Step title="Create a scene">
        In OBS, create a new scene and give it a name.

        <Frame>
          <img src="https://mintcdn.com/dfineiogmbh/G5xSKB6elOdxLHD5/images/guides/4gy4t-5365-3.png?fit=max&auto=format&n=G5xSKB6elOdxLHD5&q=85&s=25734103dc592689a8e4c91e3424f32d" alt="Creating a new scene in OBS" width="2060" height="1760" data-path="images/guides/4gy4t-5365-3.png" />
        </Frame>
      </Step>

      <Step title="Add a media source">
        Add a new **Media Source** and give it a name.

        <Frame>
          <img src="https://mintcdn.com/dfineiogmbh/G5xSKB6elOdxLHD5/images/guides/4gy4t-5365-4.png?fit=max&auto=format&n=G5xSKB6elOdxLHD5&q=85&s=531ae766ee4a75e868fa096a08f30d1c" alt="Adding a media source in OBS" width="2060" height="1760" data-path="images/guides/4gy4t-5365-4.png" />
        </Frame>
      </Step>

      <Step title="Paste the monitor link">
        In the window that opens, paste the monitor link into the input field and confirm with **OK**.

        <Frame>
          <img src="https://mintcdn.com/dfineiogmbh/G5xSKB6elOdxLHD5/images/guides/4gy4t-5365-5.png?fit=max&auto=format&n=G5xSKB6elOdxLHD5&q=85&s=d2d872683cc95b1d3e7250cf7386a4d5" alt="Pasting the monitor link into the media source" width="1580" height="2156" data-path="images/guides/4gy4t-5365-5.png" />
        </Frame>
      </Step>

      <Step title="Turn on the Decklink output">
        Make sure you have the latest Blackmagic capture drivers installed. Then open the **Tools** menu in OBS and choose **Decklink Output**.

        <Frame>
          <img src="https://mintcdn.com/dfineiogmbh/G5xSKB6elOdxLHD5/images/guides/4gy4t-5365-6.png?fit=max&auto=format&n=G5xSKB6elOdxLHD5&q=85&s=89a6552ee8aa6d3f44a56aaa8150bc75" alt="Enabling the Decklink output in OBS" width="1924" height="1680" data-path="images/guides/4gy4t-5365-6.png" />
        </Frame>
      </Step>

      <Step title="Set the output and start">
        In the Decklink Output window choose your **Device**, set the **Mode** to match your OBS video settings, and leave the **Keyer** disabled. Click **Start** to begin. For security, stop the Decklink output when you are done.
      </Step>
    </Steps>

    <Card title="Get the Blackmagic capture drivers" icon="external-link" href="https://www.blackmagicdesign.com/support/family/capture-and-playback">
      Latest software, manuals and support from Blackmagic Design.
    </Card>
  </Tab>
</Tabs>