With the available bandwidth for the Voyager probes, it didn't make sense to use film. It would have taken very long to get a single high resolution picture transmitted, instead of many smaller with different lenses and from different viewpoints. https://physics.stackexchange.com/questions/25005/cameras-in-voyager-probes
The recently recovered and digitally processed Lunar Orbiter images from 66 shows the far greater resolution and dynamics possible with a film scanning scheme from ten years before Voyager. https://pds-imaging.jpl.nasa.gov/volumes/loirp.html
Truly awe-inspiring achievement.
Voyager had a wide field camera and a narrow field camera. Each camera has a selection of colored filters for scientific research including lyman alpha for extreme ultra violet imaging reach. The Jupiter Red Spot and Jupiter approach movies were made from multiple exposures made with several filters put together with in a matrix.