LOS ANGELES  Paramount Pictures is lurching onto the Web with its “Jackass” franchise, with what it says will be the first studio-backed feature film to have its premiere online. And the studio hopes the result will be considerably more pleasurable than the old MTV show’s trademark shot to the groin  perhaps by paving the way for more profit-making Web-only material.

On Dec. 19, the studio will make “Jackass 2.5” available in connection with Blockbuster’s Movielink service. The hour-plus film has original material and previously unseen outtakes from the second “Jackass” movie in 2006. The new movie, made for less than $2 million, will stream for free but will have 15- or 30-second commercials before and after it plays.

At the same time, the studio’s fellow subsidiary of Viacom, MTV Networks, and the creators of the “Jackass” franchise are using the new film to attract traffic to jackassworld.com, now under construction.

The site is billed as an online community offering blogs, original video content and an archive of the 24 episodes of “Jackass,” which ran on MTV in 2000 and 2001, as well as its longer-running spinoff “Wildboyz.”