我正在使用ExoPlayer播放HLS文件,我正在尝试获得实际观察到的比特率(而不是指示的比特率).
我现在有onInFoListener接口,但文档很粗略,任何人都可以帮忙吗?
解决方法:
做完研究之后我想出了这个:
实际上,ExoPlayer附带了一个可用于此目的的InfoListener接口.这是我写的代码.
(在我的实现中,mVideoPlayer是保存我的ExoPlayer实例的var名称)
关于准备播放器的代码……
...
// assigns this as InfoListener for ExoPlayer
mVideoPlayer.setInfoListener(this);
...
稍后在InfoListener实现上……
private long mBytesLoaded = 0;
private long mBytesLoadedSeconds = 0;
private long mLastBytesLoadedTime = 0;
@Override
public void onl oadStarted(int sourceId, long length, int type, int trigger, Format format, int mediaStartTimeMs, int mediaEndTimeMs) {
Log.d(TAG, "onLoadStarted sourceId " + sourceId + " length " + length + " type " + type + " format " + format + " mediaStartTimeMs " + mediaStartTimeMs + " mediaEndTimeMs " + mediaEndTimeMs);
if(mLastBytesLoadedTime == 0) mLastBytesLoadedTime = System.currentTimeMillis();
}
@Override
public void onl oadCompleted(int sourceId, long bytesLoaded, int type, int trigger, Format format, int mediaStartTimeMs, int mediaEndTimeMs, long elapsedRealtimeMs, long loadDurationMs) {
Log.d(TAG, "onLoadCompleted sourceId " + sourceId + " bytesLoaded " + bytesLoaded + " type " + type + " format " + format + " mediaStartTimeMs " + mediaStartTimeMs + " mediaEndTimeMs " + mediaEndTimeMs);
// log... logBytesLoadedInSeconds
long now = System.currentTimeMillis();
float diffInSeconds = (now - mLastBytesLoadedTime) / 1000;
this.logBytesLoadedInSeconds(bytesLoaded, diffInSeconds); // helper function, explain bellow
mLastBytesLoadedTime = now;
}
这是辅助函数,它记录在几秒钟内加载了多少字节
/**
* Logs an amount of bytes loaded in an amount of seconds
*
* @param bytes amount of bytes loaded
* @param seconds time in seconds that it took to load those bytes
*/
private void logBytesLoadedInSeconds(long bytes, float seconds){
mBytesLoaded += bytes;
mBytesLoadedSeconds += seconds;
if(mBytesLoadedSeconds > 0){
double bytesPerSecond = mBytesLoaded / mBytesLoadedSeconds;
double bitsPerSecond = bytesPerSecond * 8; // (8 bits in a byte)
if(bitsPerSecond < mIndicatedBitrate){
// buffer is falling behind!
mBufferWarned = true;
}else{
if(mBufferWarned){
// buffer caught up
}
}
}
}
最后,我们可以使用所有这些信息来估算观察到的生物…
public int getObservedBitrate(){
if(mBytesLoadedSeconds != 0){
double bytesPerSecond = mBytesLoaded / mBytesLoadedSeconds;
double bitsPerSecond = bytesPerSecond * 8; // (8 bits in a byte)
Log.d(TAG," mBytesLoaded " + mBytesLoaded + " in "+mBytesLoadedSeconds+" seconds ("+(int)bitsPerSecond+" b/s indicated "+mIndicatedBitrate+" b/s) ");
return (int)bitsPerSecond;
}
return 0;
}
标签:java,android,exoplayer,hls 来源: https://codeday.me/bug/20190623/1272909.html
本站声明: 1. iCode9 技术分享网(下文简称本站)提供的所有内容,仅供技术学习、探讨和分享; 2. 关于本站的所有留言、评论、转载及引用,纯属内容发起人的个人观点,与本站观点和立场无关; 3. 关于本站的所有言论和文字,纯属内容发起人的个人观点,与本站观点和立场无关; 4. 本站文章均是网友提供,不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属;如您发现该文章侵犯了您的权益,可联系我们第一时间进行删除; 5. 本站为非盈利性的个人网站,所有内容不会用来进行牟利,也不会利用任何形式的广告来间接获益,纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。