Can I use a screenshot or photo of a ticket?

No

In a word.

Please only use the Fixr website or App to transfer tickets. Once it has gone past 9pm you will not be able to transfer that ticket. The ticket can be transferred a maximum of 3 times. 

Screenshots will scramble the barcode and make it unable to be scanned. Anyone attempting this method will simply be denied entry.

For more info on reselling tickets check out this article