I have done it and my results were good, i think .
I've created a 61:9 project and then imported my pictures and chose interpret footage to make them 16:9 and then put them in the timeline, there's a trick so you don't have to go through all pictures put them all in a bin and then choose interpret footage for that bin and all inside of it will take take action. And then i just exported it and it were good, you can choose remove flicker it it flickers .
hope i could help you .