India itself is a continent.
South-east Asia usually means southeast of China, from Thailand and Myanmar, to the Philippinnes and Indonesia. China is not part of Southeast Asia, but rather East or Northeast Asia.
Only Malaysia's a Southeastern country among your list, but Malaysia itself has hardly any large media manufacturer though Thailand, Malaysia, and Singapore each has quite many important IT offices and factories in other areas. Most important CD and DVD lines are run by Taiwan and the Taiwanese manufacturers now own and control factories in all continents including North America, Europe, China, Southeast Asia, South Korea.
Moser Baer from India is a good source of CD and DVD media nowadays, often better quality/cost than Taiwanse.