[ https://issues.apache.org/jira/browse/FLEX-34642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14220872#comment-14220872 ] 

Justin Mclean commented on FLEX-34642:
--------------------------------------

Not tested but sounds like it's related to the OSMF version, have you tried:

OSMFSettings.enableStageVideo = false;

> Playing recorded video from Wowza in a Spark VideoDisplay shows black screen but plays sound only
> -------------------------------------------------------------------------------------------------
>
>                 Key: FLEX-34642
>                 URL: https://issues.apache.org/jira/browse/FLEX-34642
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Spark Components
>    Affects Versions: Apache Flex 4.13.0, Apache Flex 4.12.1
>         Environment: iMac (20-inch, Early 2009), 2.66 GHz Intel Core 2 Duo, 4 GB 1067 MHz DDR3, NVIDIA GeForce 9400 256 MB.
> Mac OS Yosemete, Flash Builder 4.6, AIR 14.0 / 15.0, (iOS project)
>            Reporter: Amir Guterman
>              Labels: stream, video, videodisplay
>             Fix For: Apache Flex 4.10.0
>
>
> When trying to play a stream of recorded video file using Wowza 3.6.3, displayed in a Spark VideoDisplay component, the video is being played, can hear sound, but no picture only black screen.
> This bug happens only on version 4.12.0 and after.
> The bug doesn't happen on version 4.10.0 and before.
> code for reproducing the bug:
> ---------------------------------------
> var videoSource:DynamicStreamingVideoSource = new DynamicStreamingVideoSource();
> var videoStream:Vector.<DynamicStreamingVideoItem> = new Vector.<DynamicStreamingVideoItem>();
> var videoItem:DynamicStreamingVideoItem = new DynamicStreamingVideoItem();
> videoSource.host = "rtmp://0.0.0.0/vod";
> videoSource.streamType = StreamType.RECORDED;
> videoItem.streamName = "mp4:sample.mp4";
> videoStream.push(videoItem);
> videoItem.bitrate=128000;
> videoSource.streamItems = videoStream;
> vidPlayer.source = null;
> vidPlayer.source = videoSource;
> <s:VideoDisplay id="vidPlayer" autoPlay="true" />



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