1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd"> 2<HTML 3><HEAD 4><TITLE 5>Experimental API Elements</TITLE 6><META 7NAME="GENERATOR" 8CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK 9REL="HOME" 10TITLE="Video for Linux Two API Specification" 11HREF="book1.htm"><LINK 12REL="UP" 13TITLE="Changes" 14HREF="c14595.htm"><LINK 15REL="PREVIOUS" 16TITLE="Relation of V4L2 to other Linux multimedia APIs" 17HREF="x16430.htm"><LINK 18REL="NEXT" 19TITLE="Obsolete API Elements" 20HREF="x16497.htm"></HEAD 21><BODY 22CLASS="SECTION" 23BGCOLOR="#FFFFFF" 24TEXT="#000000" 25LINK="#0000FF" 26VLINK="#840084" 27ALINK="#0000FF" 28><DIV 29CLASS="NAVHEADER" 30><TABLE 31SUMMARY="Header navigation table" 32WIDTH="100%" 33BORDER="0" 34CELLPADDING="0" 35CELLSPACING="0" 36><TR 37><TH 38COLSPAN="3" 39ALIGN="center" 40>Video for Linux Two API Specification: Revision 0.24</TH 41></TR 42><TR 43><TD 44WIDTH="10%" 45ALIGN="left" 46VALIGN="bottom" 47><A 48HREF="x16430.htm" 49ACCESSKEY="P" 50>Prev</A 51></TD 52><TD 53WIDTH="80%" 54ALIGN="center" 55VALIGN="bottom" 56>Chapter 6. Changes</TD 57><TD 58WIDTH="10%" 59ALIGN="right" 60VALIGN="bottom" 61><A 62HREF="x16497.htm" 63ACCESSKEY="N" 64>Next</A 65></TD 66></TR 67></TABLE 68><HR 69ALIGN="LEFT" 70WIDTH="100%"></DIV 71><DIV 72CLASS="SECTION" 73><H1 74CLASS="SECTION" 75><A 76NAME="EXPERIMENTAL" 77>6.4. Experimental API Elements</A 78></H1 79><P 80>The following V4L2 API elements are currently experimental 81and may change in the future.</P 82><P 83></P 84><UL 85><LI 86><P 87>Video Output Overlay (OSD) Interface, <A 88HREF="x6909.htm" 89>Section 4.4</A 90>.</P 91></LI 92><LI 93><P 94><CODE 95CLASS="CONSTANT" 96>V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY</CODE 97>, 98 enum <A 99HREF="x5953.htm#V4L2-BUF-TYPE" 100>v4l2_buf_type</A 101>, <A 102HREF="x5953.htm#V4L2-BUF-TYPE" 103>Table 3-2</A 104>.</P 105></LI 106><LI 107><P 108><CODE 109CLASS="CONSTANT" 110>V4L2_CAP_VIDEO_OUTPUT_OVERLAY</CODE 111>, 112<A 113HREF="r13105.htm" 114><CODE 115CLASS="CONSTANT" 116>VIDIOC_QUERYCAP</CODE 117></A 118> ioctl, <A 119HREF="r13105.htm#DEVICE-CAPABILITIES" 120>Table 2</A 121>.</P 122></LI 123><LI 124><P 125><A 126HREF="r8494.htm" 127><CODE 128CLASS="CONSTANT" 129>VIDIOC_ENUM_FRAMESIZES</CODE 130></A 131> and 132<A 133HREF="r8724.htm" 134><CODE 135CLASS="CONSTANT" 136>VIDIOC_ENUM_FRAMEINTERVALS</CODE 137></A 138> ioctls.</P 139></LI 140><LI 141><P 142><A 143HREF="r10211.htm" 144><CODE 145CLASS="CONSTANT" 146>VIDIOC_G_ENC_INDEX</CODE 147></A 148> ioctl.</P 149></LI 150><LI 151><P 152><A 153HREF="r8087.htm" 154><CODE 155CLASS="CONSTANT" 156>VIDIOC_ENCODER_CMD</CODE 157></A 158> and <A 159HREF="r8087.htm" 160><CODE 161CLASS="CONSTANT" 162>VIDIOC_TRY_ENCODER_CMD</CODE 163></A 164> 165ioctls.</P 166></LI 167><LI 168><P 169><A 170HREF="r7900.htm" 171><CODE 172CLASS="CONSTANT" 173>VIDIOC_DBG_G_REGISTER</CODE 174></A 175> and <A 176HREF="r7900.htm" 177><CODE 178CLASS="CONSTANT" 179>VIDIOC_DBG_S_REGISTER</CODE 180></A 181> 182ioctls.</P 183></LI 184><LI 185><P 186><A 187HREF="r9804.htm" 188><CODE 189CLASS="CONSTANT" 190>VIDIOC_G_CHIP_IDENT</CODE 191></A 192> ioctl.</P 193></LI 194></UL 195></DIV 196><DIV 197CLASS="NAVFOOTER" 198><HR 199ALIGN="LEFT" 200WIDTH="100%"><TABLE 201SUMMARY="Footer navigation table" 202WIDTH="100%" 203BORDER="0" 204CELLPADDING="0" 205CELLSPACING="0" 206><TR 207><TD 208WIDTH="33%" 209ALIGN="left" 210VALIGN="top" 211><A 212HREF="x16430.htm" 213ACCESSKEY="P" 214>Prev</A 215></TD 216><TD 217WIDTH="34%" 218ALIGN="center" 219VALIGN="top" 220><A 221HREF="book1.htm" 222ACCESSKEY="H" 223>Home</A 224></TD 225><TD 226WIDTH="33%" 227ALIGN="right" 228VALIGN="top" 229><A 230HREF="x16497.htm" 231ACCESSKEY="N" 232>Next</A 233></TD 234></TR 235><TR 236><TD 237WIDTH="33%" 238ALIGN="left" 239VALIGN="top" 240>Relation of V4L2 to other Linux multimedia APIs</TD 241><TD 242WIDTH="34%" 243ALIGN="center" 244VALIGN="top" 245><A 246HREF="c14595.htm" 247ACCESSKEY="U" 248>Up</A 249></TD 250><TD 251WIDTH="33%" 252ALIGN="right" 253VALIGN="top" 254>Obsolete API Elements</TD 255></TR 256></TABLE 257></DIV 258></BODY 259></HTML 260> 261