I´m trying to write a screen recorder for android and i use this as base: https://github.com/commonsguy/cw-omnibus/tree/master/MediaProjection/andcorder
My problem is: If i select a resolution bigger than 720p with mp4/h264 settings, it crashes on stop.
Examples:
(Example 1) Does NOT work
Code in RecordingSession.java:
void start() {
recorder=new MediaRecorder();
recorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setVideoFrameRate(config.frameRate);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
recorder.setVideoSize(1080, 1920);
recorder.setVideoEncodingBitRate(config.bitRate);
recorder.setOutputFile(output.getAbsolutePath());
try {
recorder.prepare();
vdisplay=projection.createVirtualDisplay("andcorder",
1080, 1920, config.density,
VIRT_DISPLAY_FLAGS, recorder.getSurface(), null, null);
beeper.startTone(ToneGenerator.TONE_PROP_ACK);
recorder.start();
}
catch (IOException e) {
throw new RuntimeException("Exception preparing recorder", e);
}
}
Output on stop:
07-29 13:52:32.880 7845-7845/com.commonsware.android.andcorder E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.commonsware.android.andcorder, PID: 7845
java.lang.RuntimeException: Unable to start service com.commonsware.android.andcorder.RecorderService@61a260a with Intent { act=com.commonsware.android.andcorder.STOP flg=0x10000000 cmp=com.commonsware.android.andcorder/.RecorderService bnds=[257,1321][832,1513] }: java.lang.RuntimeException: stop failed.
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3045)
at android.app.ActivityThread.access$2200(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1454)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5525)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
Caused by: java.lang.RuntimeException: stop failed.
at android.media.MediaRecorder.native_stop(Native Method)
at android.media.MediaRecorder.stop(MediaRecorder.java:851)
at com.commonsware.android.andcorder.RecordingSession.stop(RecordingSession.java:84)
at com.commonsware.android.andcorder.RecorderService.stopRecorder(RecorderService.java:152)
at com.commonsware.android.andcorder.RecorderService.onStartCommand(RecorderService.java:72)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3028)
at android.app.ActivityThread.access$2200(ActivityThread.java:157)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1454)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5525)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
(Example 2) - works fine
Code:
void start() {
recorder=new MediaRecorder();
recorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setVideoFrameRate(config.frameRate);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
recorder.setVideoSize(720, 1280);
recorder.setVideoEncodingBitRate(config.bitRate);
recorder.setOutputFile(output.getAbsolutePath());
try {
recorder.prepare();
vdisplay=projection.createVirtualDisplay("andcorder",
720, 1280, config.density,
VIRT_DISPLAY_FLAGS, recorder.getSurface(), null, null);
beeper.startTone(ToneGenerator.TONE_PROP_ACK);
recorder.start();
}
catch (IOException e) {
throw new RuntimeException("Exception preparing recorder", e);
}
}
(Example 3) - also works fine
void start() {
recorder=new MediaRecorder();
recorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
recorder.setOutputFormat(MediaRecorder.OutputFormat.WEBM);
recorder.setVideoFrameRate(config.frameRate);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.VP8);
recorder.setVideoSize(1080, 1920);
recorder.setVideoEncodingBitRate(config.bitRate);
recorder.setOutputFile(output.getAbsolutePath());
try {
recorder.prepare();
vdisplay=projection.createVirtualDisplay("andcorder",
1080, 1920, config.density,
VIRT_DISPLAY_FLAGS, recorder.getSurface(), null, null);
beeper.startTone(ToneGenerator.TONE_PROP_ACK);
recorder.start();
}
catch (IOException e) {
throw new RuntimeException("Exception preparing recorder", e);
}
}
As you can see, i can record in 1080p (and any other resolution over 720p) using webm/vp8, but not using mp4/h264. Than you may ask: Why are you not using webm, it works! Because of this:
https://i.stack.imgur.com/6hYMG.png
Look at the red marked fields. Webm doesn´t save video´s length, frame- and bitrate. Also i got problems recording audio within webm. I would like to use mp4/h264, but it fails on resolutions higher than 720p. Any solution?
EDIT: My test-device is a LG G4 / Android 6.0
