在 Android 中的 MediaRecorder 中包含音频

发布于 2024-11-24 20:25:26 字数 543 浏览 2 评论 0原文

我在我的 Android 应用程序中集成了相机，可以通过移动相机录制视频并保存在 SD 卡中。它工作正常，但保存的 3gpp 文件没有附加音频。如果我添加音频配置，则相机无法打开，只会看到黑屏。这是我的代码：

if(camera == null) {
      camera = Camera.open();
  camera.unlock();
}
recorder.setCamera(camera);
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
recorder.setOutputFile("/sdcard/adtvworld.3gpp");
recorder.setPreviewDisplay(holder.getSurface());
recorder.prepare();

原文

I have integrated camera in my android app to record a video thr mobile camera and save in sdcard. it works fine, but the saved 3gpp file has no audio attached. If i add the configurations for audio the the camera does'nt open, just a black screen is seen. This is my code:

if(camera == null) {
      camera = Camera.open();
  camera.unlock();
}
recorder.setCamera(camera);
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
recorder.setOutputFile("/sdcard/adtvworld.3gpp");
recorder.setPreviewDisplay(holder.getSurface());
recorder.prepare();

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云朵有点甜 2024-12-01 20:25:26

您需要按正确的顺序设置音频源和编码器。您收到的异常是 java.lang.IllegalStateException。尝试以下操作：

if(camera == null) {
    camera = Camera.open();
    camera.unlock();
}
recorder.setCamera(camera);
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
recorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
recorder.setOutputFile("/sdcard/adtvworld.3gpp");
recorder.setPreviewDisplay(holder.getSurface());
recorder.prepare();

这段代码应该适合您。请随意将 AudioEncoder 更改为 AAC 以外的其他内容，尽管它对于低 kbps 来说是最有效的。

You need to set up audio source and encoder in a correct order. The exception you are getting is java.lang.IllegalStateException. Try following:

if(camera == null) {
    camera = Camera.open();
    camera.unlock();
}
recorder.setCamera(camera);
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
recorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
recorder.setOutputFile("/sdcard/adtvworld.3gpp");
recorder.setPreviewDisplay(holder.getSurface());
recorder.prepare();

This piece of code should be working well for you. Feel free to change the AudioEncoder to something else than AAC, although it is the most efficient for low kbps.

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