Both Alley and Resolume are able to play image sequences. Alley can batch convert them to DXV as well.
They will recognize a selection of images as a sequence when
1 - the images are in their own subfolder
2 - all the images are named sequentially (frame001.png, frame002.png, frame003.png).
When you have an extra file in there by accident, Resolume/Alley will think it's not a sequence after all and it won't work. As long as the files are named sequentially, you can use PNG, TIFF, JPG, pretty much any image format is fine. You can drag in multiple subfolders at the same time, Resolume/Alley will recognize them as separate sequences.