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Ask CDM: What Do You Use for Rear Projection Screen Material? -

I have a project coming up which requires some non-rectangular rear projection screens installed on windows. We’ve been investigating specialist rear-projection films and have found the options to be thrillingly expensive. 3M’s Vikuiti seems to be the byword in high-end rear projection films, but I couldn’t find any local distributors, and a 10m x 1.2m roll of GlassVu will set you back AU$5,000-8,000+. Not the kind of thing I’d be keen to cut in to weird shapes and install for a single evening.

Mememamo’s recent Visual Space Music installation brought up a considerably less expensive solution: Ikea’s vinyl SAXĂ…N curtains.

I’m going to be picking up a supply of these curtains soon to give them a try, but as more CDM readers are putting together installations these days, I think it would be beneficial to have this information available for the community.

What are people using for cost-effective or temporary rear-projection?

Did Apple Just Eliminate All S-Video, Composite Video Output?

It appears that, with the shift to the DisplayPort, Apple has eliminated adapter accessories for S-Video and composite video output. We’ll need to properly confirm this, but of course, you will want a way of being able to do this for maximum flexibility on the road.

DIY solutions, anyone? DisplayPort does have the ability to pass through analog signals, so there’s no reason, in theory, this shouldn’t be possible, as far as I know. And you should be able to use an adapter that translates VGA to S-Video / composite. (Apple DOES offer a VGA output adapter for the new models.)

Tto be clear, as I understand it, what’s possibly happened is the elimination of adapters from Apple, not something that’s impossible to fix. That means, unless I’m missing something, we should have at the very least an opening for some third-party accessories.

I think it’s an arrogant decision on Apple’s part: no HDMI, no S-Video, and no composite means that, if this is true, they knowingly eliminated all of the primary ways people currently connect video output on their computers. And it certainly shouldn’t be technically impossible.

I’m happy to be corrected, of course. Solutions?

Updated: Here’s one way to go, theoretically — buy Apple’s VGA adapter, then buy something like this to get your S-Vid / composite video jack. And be sure not to forget either dongle. (Doh!)

Can anyone think of any problem with going that route?

Another update: DisplayPort, as an interconnect standard, specifies both the physical connector and the signal. Apple is not properly supporting DisplayPort, because they’re substituting a completely different physical connector. And, quite frankly, that means it’s unacceptable for Apple to crow about how this is an emerging standard, when they don’t actually support that standard. It also means the options for third-party accessories will be scant.

Wanted: QuickTime 7.5 Experience, Bug Reports

New QuickTime releases are usually accompanied by a rash of bug reports — not necessarily exclusively the fault of Apple’s; maybe it simply reflects the widespread use of the QuickTime APIs and the general fragility of digital video. We’ve heard surprisingly little, though, from the visual community about QuickTime 7.5.

Macfixit does report some major issues with audio performance:

“The problems brought about by QuickTime 7.5 have proven so dire — an issue with choppy or stuttering playback is most common — for some users that downgrading to a prior version of the multimedia architecture has become an attractive option. Fortunately, downgrading to QuickTime 7.4 is a relatively easy process and is proving successful at resolving many previously document. “

QuickTime 7.5 (#4): downgrading to an older version; No sound — fix; more [MacFixIt]

Sounds delightful … to which a chorus of VJs respond, wait, what? You listen to the audio on video clips?

Despite the gloom and doom, in this case it’s unclear whether these problems are largely on PowerPC, how widespread they are, and what other codecs or third-party software may be involved in the issues. So no reason to panic here. What is useful about the MacFixIt article is that it includes a reminder that Pacificist can be used on Mac to downgrade QuickTime. (Windows users can just reinstall.) I think if you’re going to use computers at all, you have to be prepared for a little of this sort of dirty work — and, naturally, not touching anything leading up to a gig. As an aside, I caught a lot of flak for pointing out audio issues on OS X Leopard recently on Create Digital Music. That case was very different, though, in that we had isolated the source of the issue, it was relatively widespread, and caused reproducible problems with hardware and software from a variety of variables, many of whom reported the issues through their support channels. The bottom line for me, though, is that none of us wants to be the person with a problem, whether we’re alone or not — and sometimes collecting anecdotal experience is the only way to find out what’s up.

Let’s get the anecdotal feedback going:

So far, I’m having good luck on both Mac and Windows (XP and Vista). If you gig regularly and have developed a healthy and understandable fear of updating too early, you may have steered clear of this so far, but we’d love to hear from you. How is QT 7.5 working for you? Be sure to be specific about OS version, apps you’re using, the exact circumstances of any problems, and whether you’re on an Intel or PowerPC processor on the MAc side.