Live Encoder Configuration and Required Dacast Settings

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Introduction

To ensure your Dacast live stream is stable and fully functional, you MUST configure your encoder to use the settings defined on this page. These settings have been chosen to ensure the maximum compatibility with the Dacast platform as well as with newer and older devices (Desktop, Mobile, SmartTVs, etc.)

In this article you will find:

  1. Common Settings that must be used for all streaming on the Dacast platform
  2. Resolution & Bitrate Settings that differ based on the desired size and quality of your stream
  3. Unsupported Settings that must not be used or you will see problems with your stream
  4. Encoder Download Links to get your hands on a software encoder

1. Required Settings

The following settings are required for live streaming with Dacast, regardless of your selected resolution and bitrate:

Video Codec H.264 (x264 may work)
Frame Rate 25 or 30
Keyframe Interval 2 secs (or 2x frame rate)
Scanning Progressive
Encoding Bitrate Constant (CBR)
Audio Codec AAC
Audio Bitrate 128 kbps
Audio Channels 2 (Stereo)
Audio Sample Rate 48 kHz (48,000 Hz)

2. Resolution & Bitrate Settings

Please select one of the following configurations and ensure your encoder is set up with these exact settings to help prevent streaming issues:

ULD LD SD HD FHD
Name Ultra-Low Definition Low Definition Standard Definition High Definition Full High Definition
Video Bitrate (kbps) 350 350 – 800 800 – 1200 1200 – 1900 1900 – 4500
Resolution Width (px) 426 640 854 1280 1920
Resolution Height (px) 240 360 480 720 1080
H.264 Profile Main Main High High High

3. Unsupported Settings

Note that the following settings are unsupported and will break your stream:

  • Baseline H.264 Profile
  • Interlaced Scanning

4. Encoder Download Links

6 thoughts on “Live Encoder Configuration and Required Dacast Settings

  1. Dusan says:

    I am using OBS Studio on Linux, and I have configured my side as specified. However, I am unable to connect. I keep getting this message: Could not access the specified channel or stream key, please double-check your stream key. If it is correct, there may be a problem connecting to the server.

    • Maciek says:

      Thank you for your interest in Dacast’s Streaming Solutions. Please contact our Customer Support team at this link and someone will be more than happy to assist you. Have a great day!

  2. Mike says:

    When I use the settings above all works fine when I’m on the 40 second latency servers but when I use the exact same settings but then use the faster low latency server, my stream starts buffering just over the 7 minute mark. The only change I make is from the 40 second delay servers to the 6 second delay server. Each time, just over 7 minutes into the live stream, the video my clients see starts to buffer. It happens on all browsers and on different internet connections and even the preview link on the Publish section of the Live Channel.
    Any ideas?

    • Harmonie Duhamel says:

      Hi Mike, one of my colleagues from support contacted you a couple of days ago. Please let us know if you need any additional information. Thank you!

  3. James says:

    I’m having the exact same issue as Mike. I created a low latency channel and 7 minutes in it starts buffering. I have tried all different sorts of settings with no luck. Please help and please fix. I’ve already had to postpone my livestream as a result. 40-60 seconds latency is not acceptable.

    • Harmonie Duhamel says:

      Hi James, I am sorry to see you are experiencing an issue. I mentioned it to the support team, and one of my colleagues contacted you yesterday. Let me know if there is anything else I can do to help you. Have a great day, Best

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