从视频中提取关键帧，采用贪心算法和堆排序来处理视频中的大量帧信息。-Extracted from the video key frame, the use of greedy algorithm and HEAPSORT to deal with a large number of frames of video information.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001388s ]
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:0.085873s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001190s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001940s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001172s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003913s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001014s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003284s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015076s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001351s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 295736 [ RunTime:0.001405s ]
