opencv读取摄像头并将将其显示,
cvCreateCameraCapture
初始化从摄像头中获取视频
CvCapture* cvCreateCameraCapture( int index );
index 要使用的摄像头索引。如果只有一个摄像头或者用哪个摄像头也无所谓，那使用参数-1应该便可以。
函数cvCreateCameraCapture给从摄像头的视频流分配和初始化CvCapture结构。目前在Windows下可使用两种接口：Video for Windows（VFW）和Matrox Imaging Library（MIL）； Linux下也有两种接口：V4L和FireWire（IEEE1394）。
释放这个结构，使用函数cvRele
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001930s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.088831s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002330s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001959s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002196s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003742s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002081s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003306s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014735s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002426s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 300203 [ RunTime:0.001330s ]
