Video Transcoding

Live Stream Encoder Configuration and Required Dacast Settings

By Rich Jenkins

5 Min Read

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Rich Jenkins

Director of Product at Dacast with experience in enterprise, start-ups and everything in-between. Believes coffee and kale do compete and enjoys consuming both.

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      Introduction To Live Encoding

      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 that are used for live streaming on your website (Desktop, Mobile, SmartTVs, etc.) In this article you will find:

      1. Common Settings that must be used for all live 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 Live Encoder 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
      Rate Control Constant (CBR)
      Audio Codec AAC-LC
      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 video 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

      IMPORTANT: Due to COVID19, internet companies throttle download and upload speeds at various times, and therefore a lower bitrate on the lower side of the range is recommended.

      3. Unsupported Settings

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

      • Baseline H.264 Profile
      • Interlaced Scanning

      4. Encoder Download and Stream Guide Links

      Any questions or need help/access to this feature? Please contact us. Not yet a Dacast user, and interested in trying Dacast risk-free for 30 days? Sign up today to get started.

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      Additional Resources

      1. More on Video Transcoding

      Encoding is a process used to convert the RAW video files captured by a camera into digital files suitable for live streaming over the internet. This process uses either a hardware or software encoder.

      2. More Relevant Topics:

      author avatar

      Rich Jenkins

      Director of Product at Dacast with experience in enterprise, start-ups and everything in-between. Believes coffee and kale do compete and enjoys consuming both.

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