<p>Computer animation is the obvious overlap, but there a great many jobs in the film industry that are now heavily computerized. Special effects, compositing, sound editing, etc.</p>
<p>A more salient concern is whether you can complete this particular double major. Films and CS are both known for being particularly demanding of your time outside class. You may want to consider doing CS now and doing film as an extracurricular club activity, then getting a film MFA later. </p>