Extron electronics SMP 351 Installation and operating instructions

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Technical Application Note
January 23, 2019
Extron H.264 Media Processors and Encoders
Streaming to third parties using RTMP
The following notes provide guidance on setting up Extron Media Processors and Encoders
for publishing live streams to third party services via RTMP. For more information, please
call your Extron Application Engineer.
Extron Products Affected:
SMP 111
60-1594-01
SME 211
60-1763-01
SMP 351
60-1324-01 / 60-1324-11
SMP 351 3G-SDI
60-1324-02 / 60-1324-12
SMP 352 - 400 GB SSD
60-1634-11
SMP 352 3G-SDI - 400 GB SSD
60-1634-12
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.

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Technical Application Note
TECH NOTE
Encoders supports RTMP push streaming for publishing live video to third party services like
YouTube, Facebook Live, Wowza Cloud, Twitch, and others.
To configure the Encoder for RTMP Push streaming to a live streaming provider:
1. Ensure your Encoder is connected to the network and has access to the internet.
a. Open the web browser of the Encoder, Troubleshooting, Diagnostic Tools.
b. Ping your live service, such as [twitch.com].
i. If successful, a green checkmark is shown.
ii. If results fail, verify network and DNS settings.
2. Open a web browser of the Encoder, Configuration, Encoding & Metadata, Encoding
Presets:
3. Confirm the Encoder is in Stop Mode. If needed, press stop on the front panel.
4. Select RTMP push from the streaming method drop down list.
Note: The examples in this document show the interface of the SMP 111. The
interfaces of the SME 211 and SMP 300 series may look different, but the same
settings apply.

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Technical Application Note
5. The Server URL, Stream Name/Key and optionally the Username, and Password
information is needed:
a. Follow the links below to obtain the fields from these services. Services other
than those listed in this document will also require similar information.

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Technical Application Note
Streaming to Twitch
1. Go to www.twitch.tv and if not logged in to your account, do so at this time.
2. Select Dashboard” from the user menu in the upper right corner.
3. Under Stream Information, enter details about your stream such as title, notification,
category, tags, etc.

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Technical Application Note
4. Next, go to Settings –Channel from the left side menu.
5. Under the Primary Stream Key, select “Copy”.

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Technical Application Note
6. Go to the Encoder’s web page, Encoding and Layout tab, and paste the Stream key
into the Stream Name/Key field.
7. Next, go to https://stream.twitch.tv/ingests/ and select the closest server to your
location.
8. Copy the stream URL not including the {stream_key} part.
A. For example: rtmp://live-atl.twitch.tv/app/
9. Go back to the Encoder’s Web page, Encoding and Layout Tab, and paste the ingest
point URL into the Server URL field. Press “Apply”.
10. On the Encoder, click “Start RTMP stream” button to activate the stream.
11. After a few seconds, the button will change to red and indicate the RTMP stream is
now live.

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Technical Application Note
12. Go back to the Twitch Dashboard web page, and select Live
13. Verify your image and quality. The stream URL to share is your title, which is
searchable from Twitch.tv.
14. To stop the stream, press the Stop RTMP Stream button on the Encoder.

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Technical Application Note
Troubleshooting:
1. Ensure the Encoder is configured for RTMP Streaming format.
2. Ensure that the Encoder’s Stream is started, and that the firewall is open to port
1935.
3. Verify Server URL and Stream Name are entered correctly.
•Note: The Stream Name / Key will change if using “Basic Ingestion” profiles.
4. Twitch Recommended settings:
Audio Bitrate: 128 kbps
Audio Sample Rate: any
Resolution: Maximum 1080p
Framerate: Max 30 fps (SME 211 max 60)
GOP: SMP-series: max 20 @ 30 fps, max 10 @ 15 fps
SME 211: max 60 (ensure IDR interval ≤2 seconds)
Video Bitrate: Set for 80% of available bandwidth using speed test depending upon resolution.
1080p/60: 4600-6000 Kbps (SME 211 only)
1080p/30: 3500 –5000 Kbps
720p/30: 2500 –4000 Kbps
480p/30: 400 –1200 Kbps
Rate Control: CBR
H.264 Profile: Main/High