如何在android设备中录制内部音频[根/无根]
我使用并尝试了MediaRecorder.AudioSource.REMOTE_SUBMIX,在录制屏幕表面时,由于权限问题,该应用程序崩溃,在HTC 10中进行了测试[root withsuperSu 虽然它适用于以下输入:如何在android设备中录制内部音频[根/无根],android,audio-recording,mediarecorder,screen-recording,rooted-device,Android,Audio Recording,Mediarecorder,Screen Recording,Rooted Device,我使用并尝试了MediaRecorder.AudioSource.REMOTE_SUBMIX,在录制屏幕表面时,由于权限问题,该应用程序崩溃,在HTC 10中进行了测试[root withsuperSu 虽然它适用于以下输入: mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT); 我想在不使用麦
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
我想在不使用麦克风的情况下录制系统的内部/输出音频。
要求:
我需要记录屏幕的活动和音频(不使用麦克风),
当屏幕录制器打开时,如果播放youtube,我需要将其音频与屏幕活动一起录制(不使用麦克风)。我面临的挑战仅限于音频部分,请建议
private void initRecorder() {
try {
mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.REMOTE_SUBMIX);
mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mMediaRecorder.setOutputFile(Environment
.getExternalStoragePublicDirectory(Environment
.DIRECTORY_DOWNLOADS) + "/video.mp4");
mMediaRecorder.setVideoSize(DISPLAY_WIDTH, DISPLAY_HEIGHT);
mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mMediaRecorder.setVideoEncodingBitRate(512 * 1000);
mMediaRecorder.setVideoFrameRate(30);
int rotation = getWindowManager().getDefaultDisplay().getRotation();
int orientation = ORIENTATIONS.get(rotation + 90);
mMediaRecorder.setOrientationHint(orientation);
mMediaRecorder.prepare();
} catch (IOException e) {
e.printStackTrace();
}
}
开始录制弹出一个权限对话框,同时创建以下Logcat条目
2020-01-27 12:38:19.463 3958-3958/com.truiton.screencapture E/MediaRecorder: prepare failed: -2147483648
单击立即启动(用户权限)会使应用程序崩溃,并出现以下日志输出
2020-01-27 12:55:09.174 12787-12787/com.truiton.screencapture E/MediaRecorder: start called in an invalid state: 0
2020-01-27 12:55:09.178 12787-12787/com.truiton.screencapture E/MediaRecorder: Failed to start recording
java.lang.IllegalStateException
at android.media.MediaRecorder._start(Native Method)
at android.media.MediaRecorder.start(MediaRecorder.java:1063)
at com.truiton.screencapture.MainActivity.onActivityResult(MainActivity.java:122)
at android.app.Activity.dispatchActivityResult(Activity.java:7246)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4577)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4631)
at android.app.ActivityThread.-wrap19(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1699)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:180)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:835)
2020-01-27 12:55:09.183 12787-12787/com.truiton.screencapture E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.truiton.screencapture, PID: 12787
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1000, result=-1, data=Intent { (has extras) }} to activity {com.truiton.screencapture/com.truiton.screencapture.MainActivity}: java.lang.IllegalStateException
at android.app.ActivityThread.deliverResults(ActivityThread.java:4581)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4631)
at android.app.ActivityThread.-wrap19(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1699)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:180)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:835)
Caused by: java.lang.IllegalStateException
at android.media.MediaRecorder._start(Native Method)
at android.media.MediaRecorder.start(MediaRecorder.java:1063)
at com.truiton.screencapture.MainActivity.onActivityResult(MainActivity.java:122)
at android.app.Activity.dispatchActivityResult(Activity.java:7246)
at android.app.ActivityThread.deliverResults(ActivityThread.java:4577)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:4631)
at android.app.ActivityThread.-wrap19(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1699)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:180)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:835)
是否添加权限:
android.Manifest.permission.CAPTURE\u音频_