SME 211 - Video Encoder Extron - Free user manual and instructions

Product Type	H.264 Streaming Encoder
Model	SME 211
Brand	Extron
Part Number	60-1763-01
Maximum Resolution	1920x1080 (1080p)
Frame Rate	30, 50, or 60 fps
Video Bitrate	6000 kbps
Rate Control	CBR (Constant Bitrate) or VBR (Variable Bitrate)
GOP Size	30 frames
IDR Interval	2 seconds
Entropy Encoding	CAVLC
H.264 Profile	Main
Framing	I and P frames only
Streaming Protocol	RTMP (Real-Time Messaging Protocol)
Encoder Configuration	Via WebUI (Web User Interface)
Number of Encodes	2 (Encode 1 and Encode 2)
Streaming Service	Twitch (and other RTMP-compatible services)

Frequently Asked Questions - SME 211 Extron

How do I configure the SME 211 for streaming to Twitch?

Open the WebUI, navigate to Configuration > Encoding & Settings, then set resolution, framerate, bitrate, and rate control. Under RTMP settings, enter the server URL from Twitch and your stream key. Enable the RTMP encode and Main Stream Control.

What are the recommended encoding settings for Twitch?

Use 1920x1080 resolution, 6000 kbps video bitrate, CBR rate control, and a framerate of 30, 50, or 60 fps. Advanced settings include GOP 30, IDR 2, entropy CAVLC, profile Main, and framing IP.

How do I find the RTMP server URL for Twitch?

Visit https://stream.twitch.tv/ingests/. Twitch will suggest the best ingestor based on your location. Copy the server URL (e.g., rtmp://atl.contrib.live-video.net/app/{stream_key}) and paste it into the SME WebUI Server URL field after removing the stream key placeholder.

Where is the stream key located in Twitch?

Log in to your Twitch account, go to Settings > Stream. Under Primary Stream Key, click Copy. Then paste it into the SME WebUI Server Stream Key field.

What is the maximum resolution supported by the SME 211?

The SME 211 supports a maximum resolution of 1920x1080 (1080p).

Can I stream at 60 frames per second?

Yes, the SME 211 supports framerates of 30, 50, and 60 fps. Choose the appropriate setting in the encoder.

What is the purpose of the GOP size setting?

GOP (Group of Pictures) size determines how often a keyframe (I-frame) is inserted. A GOP of 30 means a keyframe every 30 frames, which balances compression efficiency and stream responsiveness.

How do I enable the Main Stream Control?

After configuring the encoder and RTMP settings, toggle the Main Stream Control to enable it. This starts the streaming output.

Do I need a Twitch account to use the SME 211?

Yes, streaming to Twitch requires an active Twitch account. The stream key is obtained from your Twitch dashboard.

What is the difference between CBR and VBR rate control?

CBR (Constant Bitrate) maintains a steady bitrate, ideal for live streaming to ensure consistent quality. VBR (Variable Bitrate) allows bitrate to vary, potentially improving quality but may cause fluctuations. The SME 211 supports both.

USER MANUAL SME 211 Extron

Using an H.264 Extron SME Encoder to Stream to Twitch

The following notes provide guidance on setting up an Extron SME Encoder for publishing live streams to Twitch, a third-party service. For more information, please call your Extron Application Engineer.

Extron Products Affected:

SME 211

60-1763-01

SPECIAL NOTES

Streaming to third party services requires a user to have an account with those services. Accounts with third party providers are the responsibility of those maintaining the stream and its content.

To configure the Encoder for RTMP Push streaming to Twitch:

1. Open the WebUI for the SME 211

2. Navigate Configuration>Encoding & Settings

3. Drop the Encoder settings field:

Resolution: 1920X1080

Framerate: 30,50,60

Video Bitrate: 6000 kbps

Rate Control: CBR/VBR

1. Open Advanced Settings:

GOP: 30

IDR: 2

Entropy: CAVLC

Profile: Main

Framing: IP

5. Note in the Capture below settings on Encode 2:

1. Close the Encoder Settings drop down.

7. Open the RTMP settings drop down:

1. Note the Encode 2 Settings in the capture above.

a. You will need to enter the Server URL using the information from Twitch at this link: https://stream.twitch.tv/ingests/

i. Twitch checks your IP and finds the best reflector for your location.

1. Copy and paste your chosen link into the server URL. In the example below remove the highlighted information.

rtmp://atl.contrib.live-video.net/app/{stream_key}

1. Log into your Twitch account and navigate to Settings>Stream
2. Where the screen shows Primary Stream Key, click "Copy" as shown:

1. Then, navigate back to the SME WebUI and paste the copied data in the Server Stream key field.

1. Ensure the RTMP Encode is enabled.
2. Enable the Main Stream Control.