<refentry id="V4L2-PIX-FMT-Y41P">
<refmeta>
<refentrytitle>V4L2_PIX_FMT_Y41P ('Y41P')</refentrytitle>
&manvol;
</refmeta>
<refnamediv>
<refname><constant>V4L2_PIX_FMT_Y41P</constant></refname>
<refpurpose>Format with ¼ horizontal chroma
resolution, also known as YUV 4:1:1</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<para>In this format each 12 bytes is eight pixels. In the
twelve bytes are two CbCr pairs and eight Y's. The first CbCr pair
goes with the first four Y's, and the second CbCr pair goes with the
other four Y's. The Cb and Cr components have one fourth the
horizontal resolution of the Y component.</para>
<para>Do not confuse this format with <link
linkend="V4L2-PIX-FMT-YUV411P"><constant>V4L2_PIX_FMT_YUV411P</constant></link>.
Y41P is derived from "YUV 4:1:1 <emphasis>packed</emphasis>", while
YUV411P stands for "YUV 4:1:1 <emphasis>planar</emphasis>".</para>
<example>
<title><constant>V4L2_PIX_FMT_Y41P</constant> 8 × 4
pixel image</title>
<formalpara>
<title>Byte Order</title>
<para>Each cell is one byte.
<informaltable frame="none">
<tgroup cols="13" align="center">
<colspec align="left" colwidth="2*" />
<tbody valign="top">
<row>
<entry>start + 0:</entry>
<entry>Cb<subscript>00</subscript></entry>
<entry>Y'<subscript>00</subscript></entry>
<entry>Cr<subscript>00</subscript></entry>
<entry>Y'<subscript>01</subscript></entry>
<entry>Cb<subscript>01</subscript></entry>
<entry>Y'<subscript>02</subscript></entry>
<entry>Cr<subscript>01</subscript></entry>
<entry>Y'<subscript>03</subscript></entry>
<entry>Y'<subscript>04</subscript></entry>
<entry>Y'<subscript>05</subscript></entry>
<entry>Y'<subscript>06</subscript></entry>
<entry>Y'<subscript>07</subscript></entry>
</row>
<row>
<entry>start + 12:</entry>
<entry>Cb<subscript>10</subscript></entry>
<entry>Y'<subscript>10</subscript></entry>
<entry>Cr<subscript>10</subscript></entry>
<entry>Y'<subscript>11</subscript></entry>
<entry>Cb<subscript>11</subscript></entry>
<entry>Y'<subscript>12</subscript></entry>
<entry>Cr<subscript>11</subscript></entry>
<entry>Y'<subscript>13</subscript></entry>
<entry>Y'<subscript>14</subscript></entry>
<entry>Y'<subscript>15</subscript></entry>
<entry>Y'<subscript>16</subscript></entry>
<entry>Y'<subscript>17</subscript></entry>
</row>
<row>
<entry>start + 24:</entry>
<entry>Cb<subscript>20</subscript></entry>
<entry>Y'<subscript>20</subscript></entry>
<entry>Cr<subscript>20</subscript></entry>
<entry>Y'<subscript>21</subscript></entry>
<entry>Cb<subscript>21</subscript></entry>
<entry>Y'<subscript>22</subscript></entry>
<entry>Cr<subscript>21</subscript></entry>
<entry>Y'<subscript>23</subscript></entry>
<entry>Y'<subscript>24</subscript></entry>
<entry>Y'<subscript>25</subscript></entry>
<entry>Y'<subscript>26</subscript></entry>
<entry>Y'<subscript>27</subscript></entry>
</row>
<row>
<entry>start + 36:</entry>
<entry>Cb<subscript>30</subscript></entry>
<entry>Y'<subscript>30</subscript></entry>
<entry>Cr<subscript>30</subscript></entry>
<entry>Y'<subscript>31</subscript></entry>
<entry>Cb<subscript>31</subscript></entry>
<entry>Y'<subscript>32</subscript></entry>
<entry>Cr<subscript>31</subscript></entry>
<entry>Y'<subscript>33</subscript></entry>
<entry>Y'<subscript>34</subscript></entry>
<entry>Y'<subscript>35</subscript></entry>
<entry>Y'<subscript>36</subscript></entry>
<entry>Y'<subscript>37</subscript></entry>
</row>
</tbody>
</tgroup>
</informaltable></para>
</formalpara>
<formalpara>
<title>Color Sample Location.</title>
<para>
<informaltable frame="none">
<tgroup cols="15" align="center">
<tbody valign="top">
<row>
<entry></entry>
<entry>0</entry><entry></entry><entry>1</entry><entry></entry>
<entry>2</entry><entry></entry><entry>3</entry><entry></entry>
<entry>4</entry><entry></entry><entry>5</entry><entry></entry>
<entry>6</entry><entry></entry><entry>7</entry>
</row>
<row>
<entry>0</entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
<entry>Y</entry><entry></entry><entry>Y</entry>
</row>
<row>
<entry>1</entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
<entry>Y</entry><entry></entry><entry>Y</entry>
</row>
<row>
<entry>2</entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
<entry>Y</entry><entry></entry><entry>Y</entry>
</row>
<row>
<entry>3</entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry></entry>
<entry>Y</entry><entry></entry><entry>Y</entry><entry>C</entry>
<entry>Y</entry><entry></entry><entry>Y</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</formalpara>
</example>
</refsect1>
</refentry>