该代码完成了复制-粘贴操作后视频的真实性检测。代码简单、易懂，对深入学习视频篡改取证具有一定的指导意义。该代码对应的参考文献：A passive approach for effective detection and localization of region-level video forgery with spatio-temporal coherenceanalysis
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002060s ]
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:0.089761s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002294s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001964s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002496s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003744s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001987s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003432s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015411s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002717s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 30709 [ RunTime:0.001786s ]
