media/v4l/pixfmt-intro.rst

1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 V4L2 drivers are not limited to these formats, however. Driver-specific
16 data can still be stored and retrieved in the proprietary format. For
17 example, a device may support a proprietary compressed format.
19 format, saving much disk space, and later use a codec to convert the
20 images to the X Windows screen format when the video is to be displayed.
23 specification would not be complete without well-defined standard
29 leftmost pixel of the topmost row. Following that is the pixel
31 pixels. Following the rightmost pixel of the row there may be zero or
32 more bytes of padding to guarantee that each row of pixel data has a
34 leftmost pixel of the second row from the top, and so on. The last row
37 In V4L2 each format has an identifier which looks like ``PIX_FMT_XXX``,
40 :ref:`four character (FourCC) codes <v4l2-fourcc>` which are also
46 and are referred to as "multi-planar formats". For example, a
47 :ref:`YUV422 <V4L2-PIX-FMT-YUV422M>` frame is normally stored in one
50 in the 2-planar version or with each component in its own buffer in the
51 3-planar case. Those sub-buffers are referred to as "*planes*".