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Thread: Key Frame Causes Pixelation on Live Feed Playback

  1. #1
    Join Date
    Jan 2011
    Posts
    18

    Default Key Frame Causes Pixelation on Live Feed Playback

    Hello,

    We are experiencing a strange problem that I thought maybe the experts here have seen before. We are live streaming using FMLE RTMP to Wowza EC2 with H.264 protocol, 2 keyframes a second, baseline 3.0. We experience pixelation during the time that the keyframe is set. The pixelation occurs on the client media player in the browser (we're using Flowplayer). So if we set the keyframe to 2 seconds in fmle, every two seconds we get pixelation on playback. If we set it to 5 seconds, we get pixelation every 5 seconds. I'm just trying to understand what may cause this issue and if anyone has seen this before.

    Thanks much,

    Greg

  2. #2
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    Greg,

    I have not heard of that before. Is it a very high bitrate? Is the encoder connected to a webcam, video card?

    Richard

  3. #3
    Join Date
    Jan 2011
    Posts
    18

    Default

    We have 4 separate instances of FMLE that all start every day at the same time, around 7 AM PST. The 4 FMLE instances all connect to a single Wowza EC2 small instance. All the video streams are 500 kbps with a webcam connected to laptop running FMLE encoder. This is an intermittent problem, it doesn't happen every day on every stream. When we restart FMLE on the streams that are pixelating on the keyframe timing sequence, it resolves the issue.

    There are a lot of variables and I don't think this is a Wowza server issue. I posted here in hopes that maybe someone else has seen/heard of the problem.

    Thanks very much for responding.

    Greg

  4. #4
    Join Date
    Dec 2007
    Posts
    21,962

    Default

    Greg,

    Interesting, thanks for the report. There is an "auto adjust" setting in FMLE, that might help.

    Richard

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