Footage from at least one camera in the hallway outside the cell where authorities say Jeffrey Epstein hanged himself is unusable by investigators probing his death — although other captures nearby are clearer, according to a new report.

Three people familiar with the investigation by the FBI and the Justice Department’s inspector general told the Washington Post that it wasn’t immediately known why some of the footage from outside the disgraced financier’s cell is too flawed to review — or what precisely can be seen in portions that are usable.

It’s unclear whether the flaw in the footage affected only a small segment of what was recorded, or whether it’s a persistent problem at the Metropolitan Correctional Center, where Epstein was housed, the paper reported.

A Bureau of Prisons spokesperson declined to comment to the outlet, as did FBI spokespeople, the Justice Department and the US Attorney’s Office in Manhattan.

Those who did speak to the paper about the footage wanted to remain anonymous because of the continuing investigation.

Epstein was found unconscious in his cell Aug. 10 when staff members in the jail’s special housing unit delivered breakfast. Before that, the last time they’d checked on him was several hours earlier, according to the report.

Now, investigators are probing whether logs were falsified to indicate someone had checked on Epstein when they had not, a source told the paper.

The convicted pedophile was supposed to have a roommate at the time of his death, but did not, according to the report.

Following an incident late last month when he was found on the floor of his cell with marks on his neck, he was placed on suicide watch for about a week. Authorities believed he had attempted suicide, but Epstein argued that he’d been attacked.

His roommate at the time was hulking former Westchester County cop Nicholas Tartaglione, who faces a death-penalty trial in four drug-related slayings upstate.

When Epstein was taken off suicide watch, he was placed back in the special housing unit, with a different roommate.

But that person was transferred a day before the money manager’s death — even though at least eight staffers were directed not to leave him alone in his cell.

Epstein had been ordered held without bail at the detention center since his July 6 arrest at Teterboro Airport in New Jersey.

Prosecutors said that between 2002 and 2005, he ran a sex trafficking ring in which he abused dozens of underage girls in his mansion on East 71st Street in Manhattan and his waterfront compound in Palm Beach, Fla.