Re: [Frameworks] The Digital Video Exhibition Problem: And An Offer To Address It

From: Brook Hinton (email suppressed)
Date: Sun Dec 05 2010 - 15:24:41 PST

Sorry for that last mispost.

True about the tearing though I've seen this from DVD and Blu ray as well on less than optimal projectors.

And I think we have a disconnect here - I'm thinking about venues for experimental work that these days have trouble affording anything - so DIY low budget scenarios are the realm addressing.


On Dec 5, 2010, at 3:09 PM, "Aaron F. Ross" <email suppressed> wrote:

> Brook Hinton <email suppressed> wrote:
>> David - that does indeed work, assuming a dead-compatible player.
>> Before folks get too over the moon though, it's NOT blu-ray quality,
>> though it is a BD spec. I can't remember the bandwidth limitation,
>> but I think significantly below the max for Blu-Ray
> I looked this up, and the nominal AVCHD-on-DVD bandwidth limit is 18
> megabits/sec. The bandwidth limit for the AVCHD format proper is 24
> megabits/sec. I've had success burning a 24mb/s file onto DVD media,
> and it played fine on my Blu-ray player, but of course your mileage may vary.
> Anyway, either 18mb/s or 24mb/s should be enough for most 1080p
> footage. It's true that commercial Blu-ray discs can be authored at
> up to 72 mb/s, but most of the ones I've seen average about 24 mb/s.
> Experimental work with a lot of motion/detail may need a higher
> bitrate than 18 or 24, so if that's the case, just encode at a higher
> rate and burn onto Blu-ray media.
> In any event, encoding issues still exist in the multimedia file
> domain. If you want your work to look good, you still have to know
> about this stuff and encode your work appropriately.
>> I'll end my anti-round-disc diatribe with this and then fall silent:
>> in multi-maker exhibition situations i've found DVDs (and by
>> extension Blu-Ray) incredibly awkward on a physical level (cueing,
>> loading, unloading, etc.)
> Well, that does mean the projectionist needs to do changeovers like
> in the old days... look at it as job security for projectionists.
> :) And of course you need a switcher or two projectors as well, so
> it does get expensive for DIY operations. But established
> institutions can certainly afford it.
> I'm just really down on the whole "dump the files in a playlist and
> let it roll" method of exhibition. My main objection is that, even
> today, computers don't have much elegance in the way they handle a
> discrepancy between source frame rate and display scan rate. In other
> words, if the media is encoded at 23.976 fps, and the desktop is
> displaying frames at 60 Hz, you're likely to see horrible horizontal
> tearing in the middle of the frame, or blurry frame blending. Pick
> your poison. With dedicated hardware such as a Blu-ray player, this
> is not an issue.
> Aaron
> -------------------------------------------
> Aaron F. Ross
> Digital Arts Guild
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