You hear that Duran Duran is headlining the London Olympics’ kickoff concert, and you wonder: Three decades on (and three albums into their comeback), are the quinquagenarian pop-rockers still that relevant? Or are the Olympics vying with Midwestern state fairs for talent bookings? Watching the concert movie “A Diamond in the Mind: Duran Duran Live 2011,” you get the idea that the answer could be a bit of both. Recorded during a Manchester, England, arena show, the 20-song DVD includes a medley of “Wild Boys” and Frankie Goes to Hollywood’s “Relax” — a fun novelty, but also a sign that, uh oh, the nostalgia abyss is yawning wide. The counter argument: the driving “Blame the Machines,” part of a chunk of material from the band’s 2011 CD, “All You Need Is Now” (billed as the “Rio” follow-up they’d always wished they’d made). Here, the hyper-editing matches the performance. The footage is sweetened with superfluous techno-doodles. Bearded singer Simon Le Bon flashes sex appeal that’s morphed from new wave to Terence Stamp. Not quite as budget-bustingly extravagant as hauling a video crew down to Sri Lanka, but you’ll appreciate the energy level. Extras: A featurette references the LA webcast concert that David Lynch directed last year. So where’s that DVD? Durannies might also want to check out this month’s Blu-ray reissue of “Barbarella,” cult-famed source of the band’s moniker — and a reminder that, wow, Jane Fonda and Roger Vadim sure were into each other. (Eagle Vision, $19.98)
DRAMA
CHARIOTS OF FIRE (1981)
Cue Vangelis anthem: The iconic Olympics-themed Oscar winner gets the requisite Blu-ray reissue timed to the London Games. Ben Cross is Harold Abrahams, the ’20s British sprinter running to prove his place in Cambridge society; Ian Charleson is Eric Liddell, the devout Scot running to please God. The actors are spotlighted in a hardcover booklet wrapping the hi-def debut, but the disc’s new extras look behind the camera, at director Hugh Hudson (“Greystoke”) and producer David Puttnam. Another new segment remembers the 1924 Paris Games as the birth of the modern Olympics. (Warner, $35.99)
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DRAMA
MARGARET (2011)
Anna Paquin plays a self-absorbed New York high schooler unraveling over her role in a fatal bus accident in playwright and filmmaker Kenneth Lonergan’s long-awaited follow-up to 2000’s “You Can Count on Me.” The film sat unreleased for years thanks to legal wrangling over the studio’s push for a shorter running time; seeing the draining end result, you may well feel the suits had a point. Poignant, unshakable coming-of-age drama is muddled by melodramatic tangents that escalate in the last act — Lonergan pushing an opera motif too far? With stage actress J. Smith-Cameron (Lonergan’s wife), Mark Ruffalo, and Matt Damon. (Fox, Blu-ray/DVD combo, $39.99)
DRAMA
THE FLOWERS OF WAR (2012)
What does the future hold for Christian Bale after “The Dark Knight Rises” — a search for more franchise work? Or renewed dedication to projects like “The Fighter”? It’s hard to say, judging by this uneven WWII story from director Zhang Yimou (“House of Flying Daggers”). Bale plays an American renegade in Japanese-occupied China who ends up helping endangered schoolchildren and a group of prostitutes, all while posing as a priest. Footnote: This was the movie Bale was promoting when he scuffled with Chinese authorities last year. Extras: Extensive featurettes. (Lionsgate, $27.98; Blu-ray, $29.99)