been using ridisc dvd-r for some time,just lately a lot of my svcd>dvd , or avi>dvd conversions are giving read errors on certain standalone players,my burner usually burns at 1x , but lately with these ridisc dvds its been burning at 4x,which it should do.the main error messgae people get are 'wrong disc' or this type of disc can not be played,there are so many factors,i was hoping it was a faulty batch of discs????-or do these players not play these conversions (my dads did,but now stopped)-any ideas??