Question

用C语言怎样才能将普通摄像头获得的视频变成可以处理的数据啊？？？

就是说 怎样可以从usb等接口获得视频数据（一帧一帧的图像也可以），然后转换成种语言数组点阵数据，然后可以接受C语言的任意处理，如何才能实现呢，是不是需要什么函数啊？
呵呵 我还是初学者 谢谢你及时提供了宝贵的参考 我先研究研究哈

Answer 1

从数据库读出的JPG文件的字符流，转换成图片显示在页面上的相关代码
转图片的到有，那个的话是转换成视频流
public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
ServletOutputStream out = res.getOutputStream();
Statement dispStmt = null, setStmt = null;
try {
dispStmt = Con.createStatement();
setStmt = Con.createStatement();
setStmt.executeUpdate("set textsize 2048000");
} catch (Exception e) {
out.println("Create Statement error:" + e.toString() + "<br>");
}

String ls_sql = null;
ls_sql = req.getParameter("ImageSQL");
if (ls_sql == null)
ls_sql = "";
ls_sql = ls_sql.trim();
if (!ls_sql.equals("")) {
ResultSet rs = null;
try {
rs = dispStmt.executeQuery(ls_sql);
} catch (Exception e) {
System.out.println(
"Unable to Exec Statment" + e.toString() + "<br>");
}
try {
while (rs.next()) {
try {
res.setContentType("image/jpeg");
InputStream is = rs.getBinaryStream(1);
int size = is.available();
byte[] bzp = new byte[size];
is.read(bzp);
out.write(bzp);
} catch (Exception e) {
System.out.println("Wirte image error: " + e.toString());
}
}
rs.close();
} catch (Exception e) {
System.out.println("Unable to Close Statment" + e.toString());
}
}
try {
dispStmt.close();
} catch (Exception e) {
System.out.println("Close Statement Error: " + e.toString());
}
out.close();
}

--------------------------------------------------------------------------------

再附一个：

从库中读图片显示到页面上的主要源码
<%@ page contentType="text/html;charset=iso8859_1"%>
<%@ page import="java.sql.ResultSet"%>
<jsp:useBean id="query" class="pub.MakeDB"/>
<%
String sql = "select * from images";
ResultSet rs = query.executeQuery(sql);
rs.next();
InputStream in = rs.getBinaryStream("image");
ServletOutputStream sos = response.getOutputStream();
int len = 0;
byte[] b = new byte[1024];
response.reset();
response.setContentType("image/gif");
while((len = in.read(b)) > 0)
sos.write(b,0,len);
in.close();
sos.close();
query.cls();
%>
如果是写到文件只要把sos
定义为DataOutputStream sos = new DataOutputStream(new BufferedOutputStream(new FileOutputStream("/a.gif")));