14

我正在尝试将 PNG 文件转换为单片视频剪辑，因此只是为了启动一个项目。

我有实现它的代码是：-

private boolean MediaConversion()
    {
        MediaCodec codec = MediaCodec.createEncoderByType(MIMETYPE);
        MediaFormat mediaFormat = null;
        if(CamcorderProfile.hasProfile(CamcorderProfile.QUALITY_720P)){
            mediaFormat = MediaFormat.createVideoFormat(MIMETYPE, 1280 , 720);
        } else {
            mediaFormat = MediaFormat.createVideoFormat(MIMETYPE, 720, 480);
        }

        mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 700000);
        mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 10);
        mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar);
        mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);
        codec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);

        codec.start();

        ByteBuffer[] inputBuffers = codec.getInputBuffers();
        ByteBuffer[] outputBuffers = codec.getOutputBuffers();
        boolean sawInputEOS = false;
        int inputBufferIndex= -1, outputBufferIndex= -1;
        BufferInfo info=null;        

        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        Bitmap bitmap = null;
        try {
        bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.image);                    
            Log.e("Uploaded", "Bitmap:" + bitmap.getWidth() + "X" + bitmap.getHeight());
        } catch (Exception e) {
            e.printStackTrace();
        }
        bitmap = Bitmap.createScaledBitmap(bitmap, WIDTH, HEIGHT, false);
        bitmap.compress(Bitmap.CompressFormat.PNG, 100,
                byteArrayOutputStream);

        byte[] dat = byteArrayOutputStream.toByteArray();
        info = new BufferInfo();

         **// Exception occurred on this below line in Emulator, LINE No. 182//**
        inputBufferIndex = codec.dequeueInputBuffer(WAITTIME);
            if(dat.length<=0)
                sawInputEOS=true;

            if(inputBufferIndex >= 0){
                if(!sawInputEOS){
                    int samplesiz= dat.length;
                    inputBuffers[inputBufferIndex].put(dat);
                    codec.queueInputBuffer(inputBufferIndex, 0, samplesiz, presentationTime, 0);
                    presentationTime += 100;

               **// Exception occurred on this below line in DEVICE, LINE No. 193 //**
                    outputBufferIndex = codec.dequeueOutputBuffer(info, WAITTIME);
                    Log.i("BATA", "outputBufferIndex="+outputBufferIndex);
                    if(outputBufferIndex >= 0){
                        byte[] array = new byte[info.size];
                        outputBuffers[outputBufferIndex].get(array);

                        if(array != null){
                            dos = array;
                        }

                        codec.releaseOutputBuffer(outputBufferIndex, false);
                        inputBuffers[inputBufferIndex].clear();
                        outputBuffers[outputBufferIndex].clear();

                    }
                }else{
                    codec.queueInputBuffer(inputBufferIndex, 0, 0, presentationTime, MediaCodec.BUFFER_FLAG_END_OF_STREAM);

                    outputBufferIndex = codec.dequeueOutputBuffer(info, WAITTIME);
                    Log.i("CHAK", "outputBufferIndex="+outputBufferIndex);

                    if(outputBufferIndex >= 0){
                        byte[] array = new byte[info.size];
                        outputBuffers[outputBufferIndex].get(array);

                        if(array != null){
                            dos = array;
                        }

                        codec.releaseOutputBuffer(outputBufferIndex, false);
                        inputBuffers[inputBufferIndex].clear();
                        outputBuffers[outputBufferIndex].clear();
                    }
                }
            }       


        codec.stop();
        codec.release();
        codec = null;

        return true;
    }

这是异常日志：-

当试图运行 Emulator Api Level 19 时：

12-02 23:58:58.214: E/SoftAVCEncoder(1193): internalSetParameter: StoreMetadataInBuffersParams.nPortIndex not zero!
12-02 23:58:58.214: E/OMXNodeInstance(1193): OMX_SetParameter() failed for StoreMetaDataInBuffers: 0x80001001
12-02 23:58:58.224: E/ACodec(1193): [OMX.google.h264.encoder] storeMetaDataInBuffers (output) failed w/ err -2147483648
12-02 23:58:58.224: I/ACodec(1193): setupVideoEncoder succeeded
12-02 23:58:58.254: E/SoftAVCEncoder(1193): Failed to initialize the encoder: -8
12-02 23:58:58.254: E/ACodec(1193): [OMX.google.h264.encoder] ERROR(0x80001001)
12-02 23:58:58.254: E/MediaCodec(1193): Codec reported an error. (omx error 0x80001001, internalError -2147483648)



12-02 23:59:00.424: E/AndroidRuntime(1193): FATAL EXCEPTION: main
12-02 23:59:00.424: E/AndroidRuntime(1193): Process: com.antech.kefilm, PID: 1193
12-02 23:59:00.424: E/AndroidRuntime(1193): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.antech.kefilm/com.antech.kefilm.NewClass}: java.lang.IllegalStateException
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2176)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.app.ActivityThread.access$700(ActivityThread.java:135)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.os.Handler.dispatchMessage(Handler.java:102)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.os.Looper.loop(Looper.java:137)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.app.ActivityThread.main(ActivityThread.java:4998)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at java.lang.reflect.Method.invokeNative(Native Method)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at java.lang.reflect.Method.invoke(Method.java:515)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at dalvik.system.NativeStart.main(Native Method)
12-02 23:59:00.424: E/AndroidRuntime(1193): Caused by: java.lang.IllegalStateException
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.media.MediaCodec.dequeueInputBuffer(Native Method)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at com.antech.kefilm.NewClass.MediaConversion(NewClass.java:182)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at com.antech.kefilm.NewClass.onCreate(NewClass.java:83)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.app.Activity.performCreate(Activity.java:5243)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
12-02 23:59:00.424: E/AndroidRuntime(1193):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2140)
12-02 23:59:00.424: E/AndroidRuntime(1193):     ... 11 more

但是，在 Galaxy Tab 3（设备）上运行时：

12-03 05:32:09.670: E/ACodec(3096): [OMX.MARVELL.VIDEO.HW.CODA7542ENCODER] ERROR(0x80001005)
12-03 05:32:09.670: E/MediaCodec(3096): Codec reported an error. (omx error 0x80001005, internalError -2147483648)

12-03 05:32:09.670: E/AndroidRuntime(3096): Caused by: java.lang.IllegalStateException
12-03 05:32:09.670: E/AndroidRuntime(3096):     at android.media.MediaCodec.dequeueOutputBuffer(Native Method)
12-03 05:32:09.670: E/AndroidRuntime(3096):     at com.antech.kefilm.NewClass.MediaConversion(NewClass.java:193)
12-03 05:32:09.670: E/AndroidRuntime(3096):     at com.antech.kefilm.NewClass.onCreate(NewClass.java:83)

参考资料，据我开始这个项目： -

提前致谢。

4

1 回答 1

8

首先，我不希望模拟器编解码器能够正常工作。如果他们确实有效，我会感到惊喜。这种前景帮助我避免失望。

其次，我的猜测是传递到编码器的帧大小是错误的。您正在获取从位图解码的 RGBA 帧并将其填充到 YUV 420 缓冲区中。这行不通。对于 YUV420，您传入的数据量应该正好是 width * height * 1.5 字节（其中 stride==width 并且平面被打包在一起）。在 Android 4.3+ 设备上，此行为通过CTS EncodeDecodeTest得到确认；不保证旧设备可以正常工作。

此外，您将格式设置为COLOR_FormatYUV420SemiPlanar; 一般来说，你不能假设。您需要查询编解码器以获取支持的格式列表，确定输入需要是平面还是半平面，然后相应地格式化缓冲区输入。EncodeDecodeTest 中的缓冲区到缓冲区和缓冲区到表面测试演示了如何执行此操作。

或者，在 Android 4.3 及更高版本上，您可以将位图上传到纹理，为 Surface 输入配置编解码器，并使用 GLES 渲染纹理（如果位图大小与您的视频大小）。不过，这需要更多的代码。

说了这么多，MediaCodec诊断通常是没用的，所以这都是猜测。

于 2013-12-03T15:48:10.547 回答