创建一个ExoPlayer的简单实例 [英] Creating a simple instance of ExoPlayer
问题描述
我目前正在寻找一个通过Android中的ExoPlayer利用Dash的应用程序.
I am currently looking to develop an application that utilises Dash through the ExoPlayer in Android.
首先,我要进行演示项目,但是即使创建一个简单的ExoPlayer工作实例也可以流mp3或类似内容时,却遇到了麻烦.
To begin with I am going through the demo project however am having trouble with even creating a simple working instance of ExoPlayer that can stream mp3 or similar.
非常感谢任何人提供的与获得非常简单的exoplayer实例有关的帮助,我可以根据这些实例进行改编和构建,或者如果有人有任何线索可以得到更多参考或指南,我可以遵循,因为似乎很少可用的文档.
Would really appreciate any help anyone can give relating to getting a very simple exoplayer instance working from which i can adapt and build upon or if anyone has any leads for more references or guides which I can follow as there seems to be very little documentation available.
非常感谢所有帮助!
推荐答案
首先,使用以下代码行实例化您的ExoPlayer:
First of all instantiate your ExoPlayer with this line:
exoPlayer = ExoPlayer.Factory.newInstance(RENDERER_COUNT, minBufferMs, minRebufferMs);
如果您只想播放音频,则可以使用以下值:
If you want to play audio only you can use these values:
RENDERER_COUNT = 1 //since you want to render simple audio
minBufferMs = 1000
minRebufferMs = 5000
两个缓冲区的值都可以根据您的要求进行调整
Both buffer values can be tweaked according to your requirements
现在,您必须创建一个数据源.当您要流mp3时,可以使用DefaultUriDataSource.您必须传递上下文和UserAgent.为了简单起见,请播放一个本地文件,并以userAgent的形式传递null:
Now you have to create a DataSource. When you want to stream mp3 you can use the DefaultUriDataSource. You have to pass the Context and a UserAgent. To keep it simple play a local file and pass null as userAgent:
DataSource dataSource = new DefaultUriDataSource(context, null);
然后创建sampleSource:
Then create the sampleSource:
ExtractorSampleSource sampleSource = new ExtractorSampleSource(
uri, dataSource, new Mp3Extractor(), RENDERER_COUNT, requestedBufferSize);
uri指向您的文件,如果要播放mp3,则作为提取器,您可以使用简单的默认Mp3Extractor.可以根据您的要求再次调整requestedBufferSize.例如使用5000.
uri points to your file, as an Extractor you can use a simple default Mp3Extractor if you want to play mp3. requestedBufferSize can be tweaked again according to your requirements. Use 5000 for example.
现在,您可以使用示例源创建音频轨道渲染器,如下所示:
Now you can create your audio track renderer using the sample source as follows:
MediaCodecAudioTrackRenderer audioRenderer = new MediaCodecAudioTrackRenderer(sampleSource);
最后在exoPlayer实例上调用准备":
Finally call prepare on your exoPlayer instance:
exoPlayer.prepare(audioRenderer);
开始播放通话:
exoPlayer.setPlayWhenReady(true);
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