WebRTC broadcast: change video bitrate/quality

Discussion in 'Web Call Server 4' started by roland.buerkel, Mar 18, 2016.

  1. roland.buerkel

    roland.buerkel New Member

    We are planning to use the WebCallServer5 for WebRTC video broadcast to 10-12 peers. The max. resolution will be 720p30.
    The video sender (publish stream) is a HTML5 WebRTC application in Firefox.
    The video quality at client side (play stream in Firefox) is rather poor (specially when there is much movement in the video).
    Is it possible to change the video bitrate/quality which is used by the WebCallServer for WebRTC video broadcast?
  2. Max

    Max Administrator Staff Member

    Make sure you have a good bandwidth to the server.
    Try to add these lines to the flashphoner.xml config or edit:
    Code:
    <video_width>1280</video_width>
    <video_height>720</video_height>
    <force_resolution>true</force_resolution>
    Please checkout the screenshot below.
    webrtc-1270-720p-force_resolution_config.jpg
  3. roland.buerkel

    roland.buerkel New Member

    I have already changed the settings you mentioned (width, height, force_resolution).
    The broadcasted 720p video has rather good quality as long as there is no movement in the video.
    But when there is much movement, the picture quality is rather bad. Looks like the bitrate is too low.
    I think I have to force a minimum bitrate in the sdp message of the sending firefox.
    What is your opinion?
  4. Max

    Max Administrator Staff Member

    We will check it from our end. I will inform you about our results.

Share This Page