The years-long project, which involved both the Park Road Post Production company in New Zealand and Stereo D in the U.S., was enormously complicated on both a visual and audio level.
After receiving hundreds of hours of footage from the museum, whose archive is among the world’s largest, the first order of business for Park Road Post was cleaning the film up, removing dust, scratches, tears and other flaws.
Then there was the tricky question of timing, of getting footage that was hand cranked at a variety of speeds to all sync up to today’s 24-frames-per-second standard without looking speeded up or slowed down.
Next came colorization, a process that went to extraordinary lengths to achieve accuracy, including trips to actual footage locations to take thousands of reference photos. No detail, not even the color of a button, was too small to get right.
The same kind of meticulousness went into the soundtrack, where sounds like horses hooves and footsteps in the mud were layered in.
Where soldiers could be seen talking to the camera, lip readers were employed to figure out what they were saying and local actors hired to make sure the accents were correct.
Once the last step, the conversion to stereoscopic 3-D, was taken, the creaky footage was so transformed that the lifelike realism that resulted is little short of reincarnation.
Persuasively edited by Jabez Olssen, who makes what must have been an impossible job look easy, “They Shall Not Grow Old” tells this story chronologically, starting with eager young enlistees and ending with inevitably wiser veterans.
One of the fascinating through lines is that almost all the soldiers — and some were as young as 14 or 15 — enlisted because they thought it would be an adventure, over within months and too exciting to be missed.
They soon found out differently, and we hear about the desolation, the dead bodies, the rats, the lice and the poison gas.
We also, perhaps most poignantly, hear what these men thought after the war, when civilians had so little idea of what they’d experienced that talking to them proved futile. One gift of this exceptional film is that we in the future can see their wartime lives more vividly than their contemporaries ever could.
“They Shall Not Grow Old”
Directed by Peter Jackson.
Rated R for disturbing war images. Check listings for theaters. Only showing Monday. 1 hour, 39 minutes long.
Bottom line: Gorgeous tribute by the present to the past