CameraToMpegTest.java无法正常工作,以IllegalStateException结束:由于状态错误无法停止

Question

我从http://bigflake.com/mediacodec/运行CameraToMpegTest.java时遇到问题.当我从Activity开始时:

public class MyActivity extends Activity {
    private CameraToMpegTest ctmt  = new CameraToMpegTest();

    ...

    @Override
    protected void onResume() {
        super.onResume();

        try {
            ctmt.testEncodeCameraToMp4();
        } catch (Throwable throwable) {
            throwable.printStackTrace();
        }

    }

    ...      

我以这个logcat结束:

D/CameraToMpegTest? video/avc output 640x480 @6000000
D/CameraToMpegTest? Camera preview size is 640x480
I/OMXClient? Using client-side OMX mux.
E/ACodec? [OMX.Nvidia.h264.encoder] storeMetaDataInBuffers (output) failed w/ err -2147483648
I/ACodec? setupVideoEncoder succeeded
D/libEGL? loaded /system/lib/egl/libEGL_tegra.so
D/libEGL? loaded /system/lib/egl/libGLESv1_CM_tegra.so
D/libEGL? loaded /system/lib/egl/libGLESv2_tegra.so
I/CameraToMpegTest? Output file is /storage/emulated/0/test.640x480.mp4
W/System.err? java.lang.IllegalStateException: Can't stop due to wrong state.
W/System.err? at android.media.MediaMuxer.stop(MediaMuxer.java:229)
W/System.err? at CameraToMpegTest.releaseEncoder(CameraToMpegTest.java:395)
W/System.err? at CameraToMpegTest.encodeCameraToMpeg(CameraToMpegTest.java:216)
W/System.err? at CameraToMpegTest.access$000(CameraToMpegTest.java:68)
W/System.err? at CameraToMpegTest$CameraToMpegWrapper.run(CameraToMpegTest.java:128)
W/System.err? at java.lang.Thread.run(Thread.java:841)
D/OpenGLRenderer? Enabling debug mode 0

经过一些测试,我试图围绕调用mStManager.awaitNewImage(); 使用带有异常打印的try-catch块,我得到了这个:

D/CameraToMpegTest? video/avc output 640x480 @6000000
D/CameraToMpegTest? Camera preview size is 640x480
I/OMXClient? Using client-side OMX mux.
E/ACodec? [OMX.Nvidia.h264.encoder] storeMetaDataInBuffers (output) failed w/ err -2147483648
I/ACodec? setupVideoEncoder succeeded
D/libEGL? loaded /system/lib/egl/libEGL_tegra.so
D/libEGL? loaded /system/lib/egl/libGLESv1_CM_tegra.so
D/libEGL? loaded /system/lib/egl/libGLESv2_tegra.so
I/CameraToMpegTest? Output file is /storage/emulated/0/test.640x480.mp4
I/System.out? java.lang.RuntimeException: Camera frame wait timed out
I/System.out? java.lang.RuntimeException: Camera frame wait timed out
D/CameraToMpegTest? encoder output format changed: {csd-1=java.nio.ByteArrayBuffer[position=0,limit=8,capacity=8], height=480, mime=video/avc, csd-0=java.nio.ByteArrayBuffer[position=0,limit=13,capacity=13], what=1869968451, width=640}
I/MPEG4Writer? limits: 4294967295/0 bytes/us, bit rate: -1 bps and the estimated moov size 3072 bytes
I/MPEG4Writer? setStartTimestampUs: 0
I/MPEG4Writer? Earliest track starting time: 0
I/System.out? java.lang.RuntimeException: Camera frame wait timed out
W/MPEG4Writer? 0-duration samples found: 1
W/MPEG4Writer? 0-duration samples found: 2
I/MPEG4Writer? Received total/0-length (3/0) buffers and encoded 3 frames. - video
D/MPEG4Writer? Stopping Video track
D/MPEG4Writer? Stopping Video track source
D/MPEG4Writer? Video track stopped
D/MPEG4Writer? Stopping writer thread
D/MPEG4Writer? 0 chunks are written in the last batch
D/MPEG4Writer? Writer thread stopped
D/MPEG4Writer? Stopping Video track
D/OpenGLRenderer? Enabling debug mode 0
I/Choreographer? Skipped 90 frames!  The application may be doing too much work on its main thread.

它似乎是类似的问题,如在这个问题(android:SurfaceTexure,相机帧等待超时),但CameraToMpegTest.java使用单独的线程.

我的测试设备是运行4.4.4 Android的谷歌Nexus 7(2012)32GB 3G.

谢谢您的帮助.

Answer 1

该MediaMuxer班将抛出"欲罢不能"的例外,如果你已经开始,但还没有喂它任何数据.这没有多大意义,但这就是它的工作原理.

根本问题是没有数据进入,这通常是由于您发现的问题(在本回答中详细描述了SurfaceTexture的一个怪癖).您需要确保执行工作的线程没有Looper.

您可能最好使用Grafika作为示例代码."连续捕获"等活动演示了应用环境中的摄像机到MPEG路径,而不是CTS测试环境.