java.lang.NullPointerException 一运行就报错了，奇怪

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java.lang.NullPointerException: Attempt to invoke virtual method 'void edu.wuwang.codec.coder.CameraRecorder.feedData(byte[], long)' on a null object reference
at edu.wuwang.codec.camera.CameraActivity.onFrame(CameraActivity.java:241)
at edu.wuwang.codec.camera.CameraDrawer.frameCallback(CameraDrawer.java:251)
at edu.wuwang.codec.camera.CameraDrawer.callbackIfNeeded(CameraDrawer.java:240)
at edu.wuwang.codec.camera.CameraDrawer.onDrawFrame(CameraDrawer.java:169)
at edu.wuwang.codec.camera.CameraView.onDrawFrame(CameraView.java:124)
at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1553)
at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1253)
Application terminated.