MediaCodec and Camera: colorspaces don't match

Question

I have been trying to get H264 encoding to work with input captured by the camera on an Android tablet using the new low-level MediaCodec. I have gone through some difficulties with this, since the MediaCodecAPI is poorly documented, but I've gotten something to work at last. I'm setting up the camera as follows: ``` Camera.Parameters parameters = mCamera.getParameters(); parameters.setPreviewFormat(ImageFormat.YV12); // <1> parameters.setPreviewFpsRange(4000,60000); parameters.setPreviewSize(640, 480); mCamera.setParameters(parameters); ``` For the encoding part, I'm instantiating the MediaCodec object as follows: ``` mediaCodec = MediaCodec.createEncoderByType("video/avc"); MediaFormat mediaFormat = MediaFormat.createVideoFormat("video/avc", 640, 480); mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 500000); mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 15); mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar); // <2>…

Accepted Answer

I solved it by swapping the byteplanes myself on Android level, using a simple function:

```
public byte[] swapYV12toI420(byte[] yv12bytes, int width, int height) {
    byte[] i420bytes = new byte[yv12bytes.length];
    for (int i = 0; i < width*height; i++)
        i420bytes[i] = yv12bytes[i];
    for (int i = width*height; i < width*height + (width/2*height/2); i++)
        i420bytes[i] = yv12bytes[i + (width/2*height/2)];
    for (int i = width*height + (width/2*height/2); i < width*height + 2*(width/2*height/2); i++)
        i420bytes[i] = yv12bytes[i - (width/2*height/2)];
    return i420bytes;
}
```

MediaCodec and Camera: colorspaces don't match

Solution

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