I have a scene where I just move the camera on a path.
It lasts 96 frames but when I try to render the animation with 100% percentage scale it stops at the first frame as it is a single image.
I've tried changing it at 50% and in that case it works and I have as output the correctly animated video.
I've also tried to render all the 96 single frames as images and then put them in the video sequence editor to create the final video, but it didn't work: it still renders just the first frame and then it stops.
This is the blender file (just the camera and the path with the cube). I don't know why but by appending camera and path in a this new file, the camera moves just a bit along the path (while if I add the entire scene it works)