Steps to Stream on X.com via RTMP:

    Access Media Studio Producer:
        Log in to your X.com account and navigate to Media Studio Producer.

    Create a Video Source:
        Click on the "Sources" tab within Media Studio Producer.
        Click "Create source" and select "RTMP" as the source type.
        Fill in the required fields, such as the source name and the region closest to your streaming origin location.
        Click "Create".

    Retrieve RTMP Details:
        After creating the source, you'll see detailed RTMP information, including the RTMP URL and Stream Key.

    Configure Streaming Software:
        Open your streaming software (e.g., vMix).
        Go to the streaming settings and input the RTMP URL in the "Server" or "URL" field.
        Input the Stream Key in the "Stream Key" field.

    Start Streaming:
        Start streaming from your software.
        Go back to Media Studio Producer on X.com and follow the instructions to create a broadcast using the source you just set up.

    Go Live:
        Once everything looks good in the preview, click "Go Live" on X.com to start your live stream.

Important Notes:

    RTMP URL and Stream Key: These are provided by X.com after you create a source. Keep these confidential.

    Security: X.com also provides an RTMPS URL for added security.

    Video Specifications:
        Video codec: H.264/AVC
        Video bitrate: 9Mbps (recommended), 12Mbps (maximum)
        Audio codec: AAC-LC
        Audio bitrate: 128kbps (maximum)
        Resolution: 1280x720 (recommended), 1920 x 1080 (maximum)
        Frame rate: 30 fps (recommended), 60 fps (maximum)

That should cover everything you need to know to stream via RTMP to X.com.