Convert NV12 & NV21 to YUV420P

Simple and easy-understand C++ codes for converting NV12 & NV21 to YUV420P

Basic understanding of these format

These three format all have NxM Y plane followed by (N/2)x(M/2) V and U planes.

For example N = 6 & M = 4 the YUV420P

the NV12

and the difference between NV12 and NV21 is that the position of U and V is opposite

References

• http://blog.csdn.net/fanbird2008/article/details/8232673
• http://www.fourcc.org/yuv.php