A group of Queensland filmmakers have taken the story of a mystery hero, who stood up for a bus driver during a racial argument on a inner-city bus, to the big screen.

Based on a true story, The Bus Knight follows events which occurred on a Brisbane bus travelling through Fortitude Valley in 2012.

When the incident initially took place, a commuter posted the experience on social media sending the story viral.

The filmmakers have raised more than $4,000 through crowdfunding to create the 6-minute short film.

"My friend saw it happen when he was on a bus through The Valley and a Russian bus driver was driving," director Tony Walsh told 612 ABC Brisbane's Spencer Howson.

"Two fare evaders started racially abusing the bus driver until a stranger stood up to them.

"The two people turned on him and started being physically confronting until the hero called their bluff."

Walsh said the mystery stranger led the fare-evaders off the bus away from the driver.

"When they got off, the bus driver shut the door and the bus drove off - all the passengers cheered," he said.

"Our one-line synopsis is 'a mysterious stranger saves an inner-city bus ride from the tyranny of racist fare dodgers'."

Taking the story to film

Creators have described the film as a stylistic comedy "like a Kurosawa film smashed together with Danny Boyle's Trainspotting," Walsh said.

Angus Robinson, the man who originally shared the story on social media, helped with the creation of the film.

"The post went viral and it became the highest rated user-generated content on Reddit.com," Walsh said.

"Angus appears as himself in the film too."

Producer Brenton Pinsent said the crew had mentorship from Screen Queensland to get the movie to the final stage.

"We applied for funding through the Raw Nerve program, which does three films in each state," Pinsent said.

"Part of that is a three month intensive program with the ABC and Screen Queensland. It was a huge help."

The filmmakers hope to get the short film on as many screens as possible, as well as sharing the movie online.

"The plan is to hit the film festival circuit and, since the original post was online and that's where our audience is, our end goal is to get it out there," Pinsent said.

Walsh said had been discussion on whether or not to find the mystery hero of the original event, but the crew decided against it.

"We haven't found the real bus knight yet, but sometimes things are better left to mystery," he added.

The film will air on ABC 2 on Friday August 21 at 9.20pm.