Masters

Multimedia is the field related to computer-controlled integration of texts, (still or moving images) graphics, drawings, audio and animations. The information/content in the multimedia can be represented through digitally (audio, video and animation) in contrast to traditional media.
It may give many job opportunities like that of a designer, animator, lecturers, freelancers, etc.
The following are some of the postgraduate courses available in the field of multimedia:
1)Master of Arts in multimedia
2)Masters in 3D animation
3)Masters in animation filmmaking
4)Master of Arts in animation and VFX
5)Master diploma in Animation and VFX
6)MA VFX and animation
7) M. Sc in animation and visual effects
8) Master diploma in viscom
9) Post graduate program in digital design
10) Masters in animation and creative arts
11) MA graphics and multimedia design
12)M.Sc in multimedia

Yes, there are many institutes offering 1-year PG courses. Check the below link: https://www.shiksha.com/business-management-studies/colleges/executive-mba-colleges-india
While a Bachelor's degree demonstrates proficiency in an academic area, a Master's degree signifies expertise. It is employment-friendly. If you are already a member of the workforce, taking two years off for graduate school can seem like a lengthy tenure. One year, however, affords you the same opportunity for advancing your career without missing two years of working. The 1-year course is more cost-friendly than the 2-year course. Master's degree can be an invaluable differentiator in a crowded and competitive job market. While adding skills, job responsibilities and other talents add appeal to your resume, a Master's degree is more than a mere line item. Even if it was possible for a one-year Master's degree to convey as much knowledge and expertise as a two-year program, the pace will be significantly faster.