Dith Pran, a photojournalist for The New York Times whose gruesome ordeal in the killing fields of Cambodia was re-created in a 1984 movie that gave him an eminence he tenaciously used to press for his people’s rights, died on Sunday at a hospital in New Brunswick, N.J. He was 65 and lived in Woodbridge, N.J.

The cause was pancreatic cancer, which had spread, said his friend Sydney H. Schanberg.

Mr. Dith saw his country descend into a living hell as he scraped and scrambled to survive the barbarous revolutionary regime of the Khmer Rouge from 1975 to 1979, when as many as two million Cambodians  a third of the population  were killed, experts estimate. Mr. Dith survived through nimbleness, guile and sheer desperation. His credo: Make no move unless there was a 50-50 chance of not being killed.

He had been a journalistic partner of Mr. Schanberg, a Times correspondent assigned to Southeast Asia. He translated, took notes and pictures, and helped Mr. Schanberg maneuver in a fast-changing milieu. With the fall of Phnom Penh in 1975, Mr. Schanberg was forced from the country, and Mr. Dith became a prisoner of the Khmer Rouge, the Cambodian Communists.

Image Mr. Dith, pictured during a reunion with his family in 1989, in Siem Reap. Credit... Steve McCurry/Magnum

Mr. Schanberg wrote about Mr. Dith in newspaper articles and in The New York Times Magazine, in a 1980 cover article titled “The Death and Life of Dith Pran.” (A book by the same title appeared in 1985.) The story became the basis of the movie “The Killing Fields.”