Delete a Message
antp
EDIT: I did find one way. By resizing the picture to 500x281, then saving it, then resizing it back to 720x405, with the resulting filesize lowered to 23.9 KB....but with a (very minor) loss of picture quality.
I doubt that there is only a very minor loss in that. Half of details must have been lost.
EDIT II: Oddly, when in their original size of 864x486, their filesize is only 31.40 KB...
If they become so big after, I guess that when you resize them you do not adjust the compression ratio. Did you resize them one by one or dod you use the batch conversion?