这是我用来以MP4格式记录来自
Android设备的视频的代码.正在创建文件,但大小为0字节.我似乎不明白出了什么问题.任何帮助将不胜感激.
if(mCamera == null) {
mCamera = Camera.open();
mCamera.unlock();
}
if(mediaRecorder == null)
mediaRecorder = new MediaRecorder();
mediaRecorder.setCamera(mCamera);
mediaRecorder.setCamera(mCamera);
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
mediaRecorder.setoutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mediaRecorder.setMaxDuration(maxDurationInMs);
mediaRecorder.setoutputFile("/sdcard/1.mp4");
mediaRecorder.setVideoFrameRate(videoFramesPerSecond);
mediaRecorder.setVideoSize(176,144);
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
mediaRecorder.setPreviewdisplay(surface);
mediaRecorder.setMaxFileSize(maxFileSizeInBytes);
mediaRecorder.prepare();
try {
mediaRecorder.prepare();
} catch (IllegalStateException e) {
// This is thrown if the prevIoUs calls are not called with the
// proper order
e.printstacktrace();
}
mediaRecorder.start();
解决方法
这种行为的原因是你完成录音后可能(95％肯定)再次调用recorder.setoutputFile()(也许是在recorder.stop()之后).因此旧文件正被新的空文件重写.