To make a series of images of today.jpg, suitable for animation, try this: First roll the today image, wrapping left edge of rectangle around onto right, like:
convert -roll +0+0 today.jpg today.rolled0.jpg
convert -roll +50+0 today.jpg today.rolled50.jpg
convert -roll +100+0 today.jpg today.rolled100.jpg
convert -roll +150+0 today.jpg today.rolled150.jpg
etc.
The roll amounts are pixels, not degrees!
Then use Fred Weinhaus' spherize script (according to his usage req's), like:
spherize.sh -b none -s today.rolled0.jpg today.rolled0.sphere.jpg
spherize.sh -b none -s today.rolled50.jpg today.rolled50.sphere.jpg
spherize.sh -b none -s today.rolled100.jpg today.rolled100.sphere.jpg
spherize.sh -b none -s today.rolled150.jpg today.rolled150.sphere.jpg
etc.
You can make images like these:
All 30 images, each one has been wrapped using ImageMagick, as above.