An appeals court today cast serious doubt on a notorious sex-abuse conviction that was the subject of the Oscar-nominated documentary “Capturing the Friedmans.”

But the federal Second Circuit Court of Appeals in Manhattan upheld Jesse Friedman’s 1988 guilty plea on a technicality, saying he failed to meet a one-year deadline for challenging the use of hypnosis on an accuser after learning about it from the film.

The court said it hoped the Nassau County DA would conduct a “complete review” of Friedman’s claim that he was railroaded into pleading guilty through the use of questionable “recovered memories” from his accusers. Friedman, who was paroled in 2001, and his father, Arnold, admitted molesting more than a dozen boys in their Great Neck, LI, home.

A spokeswoman for the Nassau County DA’s Office said it was “reviewing the decision.”