A US court has barred RealNetworks from selling software that enables users to copy DVDs to computer hard drives until a full trial has been held.
US District Court Judge Marilyn Patel said RealNetworks failed to show its RealDVD software is to be used for legitimate purposes, according to Associated Press.
Several film studios including Walt Disney filed suits against RealNetworks last year, claiming the RealDVD software would promote software piracy.
RealNetworks said its product legally meets a growing consumer interest in creating copies of their DVDs for convenient storage and viewing.
The firm's lawyers argued that RealDVD is equipped with anti-piracy features that limit a consumer to making only a single copy.
But Patel said the software appears to violate federal law against digital piracy and ruled that the software should not be sold until a full trial has been held.
The Motion Picture Association of America has welcomed the temporary banning order against the sale of RealDVD software.
"This is a victory for the creators and producers of motion pictures and television shows and for the rule of law in our digital economy," it said in a statement.
No date has been set yet for the full trial in the case to begin.