我希望能够直接使用ffmpeg将音频（opus编解码）流式传输到安卓设备。
在电脑上，我开始了流媒体的传输：
./ffmpeg -re -stream_loop -1 -i akgld-c8mxm.opus -acodec libopus -ac 1 -ab 96k -vn -f rtp rtp://192.168.0.100:6000
192.168.0.100是我的手机的本地WiFi地址。
在Android设备上，我尝试播放流媒体：
public void tryPlayStream() {
String ip = Utils.wifiIpAddress(this);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitNetwork().build();
StrictMode.setThreadPolicy(policy);
AudioManager audio = (AudioManager) getSystemService(AUDIO_SERVICE);
audio.setMode(AudioManager.MODE_IN_COMMUNICATION);
audioGroup = new AudioGroup();
audioGroup.setMode(AudioGroup.MODE_ECHO_SUPPRESSION);
InetAddress inetAddress;
try {
inetAddress = InetAddress.getByName(ip);
audioStream = new AudioStream(inetAddress);
audioStream.setCodec(AudioCodec.PCMA);
audioStream.setMode(RtpStream.MODE_RECEIVE_ONLY);
InetAddress inetAddressRemote = InetAddress.getByName(ip);
audioStream.associate(inetAddressRemote, 6000);
audioStream.join(audioGroup);
} catch (Exception e) {
e.printStackTrace();
}
}
在logcat中我看到下面的行：
E/AudioRecord: AudioFlinger could not create record track, status: -1
E/AudioGroup: cannot initialize audio device
我做错了什么？谢谢任何帮助。