YUV420P，Y，U，V三個分量都是平面格式，分爲I420和YV12。在I420格式（即：YUV）；但YV12則是相反（即：YVU）。
YUV420SP, Y分量平面格式，UV打包格式, 即NV12。 NV12與NV21類似，U 和 V 交錯排列,不同在於UV順序。
I420: YYYYYYYY UU VV =>YUV420P
YV12: YYYYYYYY VV UU =>YUV420P
NV12: YYYYYYYY UVUV =>YUV420SP
NV21: YYYYYYYY VUVU =>YUV420SP
private void YV12toNV21(final byte[] input, final byte[] output, final int width, final int height) {
long startMs = System.currentTimeMillis();
final int frameSize = width * height;
final int qFrameSize = frameSize / 4;
final int tempFrameSize = frameSize * 5 / 4;
System.arraycopy(input, 0, output, 0, frameSize); // Y
for (int i = 0; i < qFrameSize; i++) {
output[frameSize + i * 2] = input[frameSize + i]; // Cb (U)
output[frameSize + i * 2 + 1] = input[tempFrameSize + i]; // Cr (V)
}
}
//I420 To NV21
private void I420ToNV21(final byte[] input, final byte[] output, final int width, final int height) {
//long startMs = System.currentTimeMillis();
final int frameSize = width * height;
final int qFrameSize = frameSize / 4;
final int tempFrameSize = frameSize * 5 / 4;
System.arraycopy(input, 0, output, 0, frameSize); // Y
for (int i = 0; i < qFrameSize; i++) {
output[frameSize + i * 2] = input[tempFrameSize + i]; // Cb (U)
output[frameSize + i * 2 + 1] = input[frameSize + i]; // Cr (V)
}
}