LOS ANGELES, Jan. 9 (UPI) -- Since the Writers Guild of America strike began Nov. 5, feature film production in Los Angeles is up 52 percent compared to the same period last year.

Most movie studios stockpiled projects in anticipation of the strike.

TV production, however, is at a virtual standstill with all but one scripted series shut down because of the strike, creating a direct economic impact of $160 million per week, Variety.com reported Wednesday.

Warner Bros. has notified more than 1,000 employees in its studio facilities operations that an unspecified number of people will soon be let go.

"It now appears that the WGA's strike will continue for the foreseeable future and we must begin to scale back our operations due to the decline in production activity," Warner Senior Vice President Joann Black said in a letter.

While representatives for Disney, Sony, DreamWorks and 20th Century Fox told Variety.com no film-related layoffs are in the works the Anschutz Film Group production companies Walden Media and Bristol Bay have closed most of their creative departments and laid off much of its physical production staff, the trade paper said.

Walden is, however, expected to retain the key players on its "Chronicles of Narnia" team.