Flex：使用 VideoDisplay 组件在直播流之间进行多比特率切换

发布于 2024-09-10 12:12:11 字数 449 浏览 7 评论 0原文

我将一个 DynamicStreamingVideoSource 对象传递给 VideoDisplay 组件的源属性，该对象包含 3 个不同的动态直播流项目，由以下 XML 描述，供您考虑：

src="rtmp://88.87.56.214:1935/live/fashiontv_tmo_h .stream”比特率=“19200” src =“rtmp://88.87.56.214:1935/live/fashiontv_tmo_m.stream”比特率=“9000” src="rtmp://88.87.56.214:1935/live/fashiontv_tmo_l.stream" bitrate="3600"

但是播放器随后以最低比特率运行流，这三个比特率中的最低比特率。这不是应该的吗寻找最终用户可以观看的最高比特率的流？所有 3 个流均已单独测试并且均可观看。

谢谢，利维乌

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救星 2024-09-17 12:12:11

我修好了！

我知道这个回复是 5.5 年后的事了，但这仍然可以帮助某人。我遇到了同样的问题，并且经过数小时的寻找答案后得以解决。您所需要的只是为媒体播放器中的缓冲区设置一个非零值。

示例：

使用 Spark VideoDisplay：

<s:VideoDisplay id="rtmpABRVideo" width="320" height="240" initialize="rtmpABRVideo.mx_internal::videoPlayer.bufferTime=2">
  <s:DynamicStreamingVideoSource host="rtmp://localhost:1935/live" streamType="live">
    <s:DynamicStreamingVideoItem streamName="webcam_1000" bitrate="1000" />
    <s:DynamicStreamingVideoItem streamName="webcam_500" bitrate="500" />
    <s:DynamicStreamingVideoItem streamName="webcam_150" bitrate="150" />
  </s:DynamicStreamingVideoSource> 
</s:VideoDisplay>

使用 OSMF 组件：

var dynResource:DynamicStreamingResource = new DynamicStreamingResource('rtmp://localhost/live');
dynResource.urlIncludesFMSApplicationInstance = false;
dynResource.streamItems = Vector.<DynamicStreamingItem>([
                                new DynamicStreamingItem("mp4:webcam_150", 150, 320, 240),
                                new DynamicStreamingItem("mp4:webcam_500", 500, 320, 240),
                                new DynamicStreamingItem("mp4:webcam_1000", 1000, 320, 240)
                          ]);

var videoElement:VideoElement = new VideoElement();
videoElement.resource = dynResource;

var mediaPlayerSprite:MediaPlayerSprite = new MediaPlayerSprite();
mediaPlayerSprite.width = 320;
mediaPlayerSprite.height = 240;
mediaPlayerSprite.media = videoElement;
mediaPlayerSprite.mediaPlayer.bufferTime = 2;

addChild(mediaPlayerSprite);

希望这对那里的人有帮助！

I fixed it!!!

I know this reply is 5.5 years later, but this could still help someone. I had the same problem and was able to fix it after hours and hours of searching for an answer. All you need is to have a non-zero value for the buffer in the media player.

Examples:

Using Spark VideoDisplay:

<s:VideoDisplay id="rtmpABRVideo" width="320" height="240" initialize="rtmpABRVideo.mx_internal::videoPlayer.bufferTime=2">
  <s:DynamicStreamingVideoSource host="rtmp://localhost:1935/live" streamType="live">
    <s:DynamicStreamingVideoItem streamName="webcam_1000" bitrate="1000" />
    <s:DynamicStreamingVideoItem streamName="webcam_500" bitrate="500" />
    <s:DynamicStreamingVideoItem streamName="webcam_150" bitrate="150" />
  </s:DynamicStreamingVideoSource> 
</s:VideoDisplay>

Using OSMF Components:

var dynResource:DynamicStreamingResource = new DynamicStreamingResource('rtmp://localhost/live');
dynResource.urlIncludesFMSApplicationInstance = false;
dynResource.streamItems = Vector.<DynamicStreamingItem>([
                                new DynamicStreamingItem("mp4:webcam_150", 150, 320, 240),
                                new DynamicStreamingItem("mp4:webcam_500", 500, 320, 240),
                                new DynamicStreamingItem("mp4:webcam_1000", 1000, 320, 240)
                          ]);

var videoElement:VideoElement = new VideoElement();
videoElement.resource = dynResource;

var mediaPlayerSprite:MediaPlayerSprite = new MediaPlayerSprite();
mediaPlayerSprite.width = 320;
mediaPlayerSprite.height = 240;
mediaPlayerSprite.media = videoElement;
mediaPlayerSprite.mediaPlayer.bufferTime = 2;

addChild(mediaPlayerSprite);

Hope this was helpful for someone out there!

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