android webrtc stream black screen

Discussion in 'Web Call Server 5' started by SLM, Nov 3, 2017.

  1. SLM

    SLM Member

    Repeatedly we get reports that streams to an android phone are not working (not displaying). No discernible error can be found or is reported.

    I've sent the logfiles to logs@flashphoner for one of those sessions, which in this case started Nov 3rd at 12:59:11 hours local Amsterdam time.

    Also included are the javascript console files with local debug info for the session. The console log from the Android phone is _client_console_log.txt and the other one is the publisher's.

    As you can see, a recent OS (Android 7.0 Lollipop) and Chrome browser is used (Chrome 61.0.3163.98) on the caller's side. The stream is said to be playing locally (video element event) but the caller doesn't see the stream.

    Apparently the caller first refreshed his browser before the publisher could request a console log from the caller so this client log displays his second attempt at viewing the stream.

    Could you look into this and advise?

    WebSDK version is

    Server version is FlashphonerWebCallServer-5.0.2519

    Here is some additional info as to what exactly happens / has been triggered in the client console log:
  2. Max

    Max Administrator Staff Member

    This is known Chrome 61 issue reproduced with Android 6 and 7.
    Try to add such code line to your css file and make sure it is applied to the video element. It should fix the issue.
    video {border-radius: 1px;}
  3. SLM

    SLM Member

  4. SLM

    SLM Member

    Could be a coincidence but after applying this fix, we get reports of video stuttering on Chrome 61. At least the video showed but stuttering without a bandwidth problem is also not very good.
  5. Max

    Max Administrator Staff Member

    On our tests it worked well without any stuttering.
    Could you please test with our latest demo server at 2542

    For your installation, we need to play your stream and see server-side logs to reproduce the issue.
    1. Provide ssh access to server to monitor logs and settings.
    2. Dashboard access at https://host:8888
    Then we will be able to play a stream on your server, check logs and reproduce the issue on Android 7 + Chrome 61.
    You can send details to
  6. SLM

    SLM Member

    Can you PM me your ip address so that I can grant access on the firewall?
  7. Max

    Max Administrator Staff Member

    For ssh, please add our wcs5-eu server IP to the white-list

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