just select dates is easy like this
SELECT FROM_UNIXTIME( revtstmp/1000 ) FROM revinfo;
if you want the detailed data result you can do like this.
SELECT r.rev,FROM_UNIXTIME( revtstmp/1000 ),pa.* FROM revinfo r
left join picture_aud pa on pa.rev=r.rev;
well you just need to change table name up there picture to what ever is your table name is.