YUV

Planar

YUV 4:2:0 (I420/YV12)

I420

In I420, you have luma "luminance" planes Y and chroma planes U, V.

In I420, chroma planes (blue and red projections) are subsampled in both the horizontal and vertical dimensions by a factor of 2.

For a 2x2 group of pixels, you have 4 Y samples and 1 U and 1 V sample.

YV12

YV12 is exactly like I420, but with U and V order reversed.

NV12/NV21

NV12

Related to I420, in NV12, you have one luma "luminance" planes Y and one plane with U and V data interleaved. NV12 is considered as semiplanar.

In NV12, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2.

For a 2x2 group of pixels, you have 4 Y samples and 1 U and 1 V sample.

NV21

NV21 is like NV12, but with U and V order reversed: it starts with V

YUV 4:2:2

I422

In I422, like in I420, you have luma "luminance" planes Y and chroma planes U, V.

However, in I422, chroma planes (blue and red projections) are subsampled just in the horizontal dimension by a factor of 2. There is the same amount of lines than in the luma.

For a 2x2 group of pixels, you have 4 Y samples and 2 U and 2 V sample.

Packed

In packed formats, you only have one plane, with all the luma and chroma interleaved.

UYVY

Know as UYVY, Y422, UYNV

YUY2

Know as YUY2, YUYV, V422, YUNV

YVYU

YVYU is just like YUY2, but with U and V order reversed.

This page is part of official VLC media player Documentation (User Guide • Streaming HowTo • Hacker Guide • Modules)
Please read the Documentation Editing Guidelines before you edit the documentation

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.