V4L2(Video for Linux 2)的测试程序，出自官方网站。并附带一份V4L2的规范文档。运行环境是Ｘ-window，对内核没有特殊要求。-V4L2 (Video for Linux 2) of the test program came from the official website. And accompanied by a V4L2 specification document. Operating environment is the X-window, and there are no special requirements on the kernel.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001244s ]
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:0.099520s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001458s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001988s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001614s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005367s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001233s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006967s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.023815s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001651s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 179867 [ RunTime:0.016964s ]
