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This topic comprises 2 pages: 1 2
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Author
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Topic: Sensitivity to dirt and scratching on BDs
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Frank Angel
Film God
Posts: 5305
From: Brooklyn NY USA
Registered: Dec 1999
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posted 12-12-2011 11:14 AM
The beauty of playing off a hard drive copy is that you can get only the movie and I would guess 9 times out of 10 computer playback is more reliable than optical disc. If nothing else, there are no contamination issues to worry about. Then there is the beauty of no menu crap.
I once got screwed where a player which I had in pause waiting for some academic to give his bs introduction to a movie (a movie that SPEAKS FOR ITSELF, but instead we had to listen to him babble away), the player finally went out of pause and back to start so I had to quickly recue it missed -- up came the Fox HOME ENTERTAINMENT logo before the actual movie FOX logo, telling everyone it was a DVD. There was obvious displeasure heard from the audience -- the venue hadn't let people know they were going to watch a DVD (a BIG mistake in my mind).
In situations where I can't do a rip to HDrive, I now insist on dual playback -- two players running as close to sync as I can manually get them into a switcher so that if one freezes, and won't go passed some damn pit somewhere, bingo, I am back on the screen lickty split.
I got burned once with a disc that wouldn't play passed a point more than an hour into the film at a kids show -- 200 screaming kids -- it wasn't a fun matinee. I vowed that would never happen to me again. When we were showing some Chaplin stuff to an audience of 4000, I said it was either two players running simultaniously or yourself another lad. From then on we use dual.
This BTW, harks back to the thread about which players 1) have a way of completely disabling the on-screen menu, especially the damn function indications (PLAY, PAUSE, etc.), or at least 2) will allow the player to stay in pause indefinately or a REALLY LONG TIME, like a half an hour or more. No way I want the audience to see ANYTHING that reminds them of the inferior medium they are watching, even if they are told beforehand that it's a DVD or BRD. There is just something about actually seeing stuff they see at HOME playing on a theatre screen that ruins the presentation, at least for me, it's just embarrassing. A shame we are forced to resort to such crap.
And what's even more maddening, as Brad says, the studio or Swank of whoever is renting to art houses is still charging a "non-home" licence fee...like $300 to $1000, so they should be also supplying theatrical, non-home DVD or BRD versions -- i.e., just the MOVIE. I say they should even add a standard 10 or 15 second lead-in in black in front of the first frame of the movie so if we are stuck with a player that insists on showing the PLAY indication, we can keep the douser closed until that passes and we will still be clean in black. What studio will respect their own product enough to do this for art houses forced to run home movies? My face is laughing at the thought.
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Leo Enticknap
Film God
Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
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posted 12-12-2011 11:45 AM
DVDFab includes a facility to re-author the front end in the ripping process, so that it'll jump straight to the main menu when the disc is inserted without displaying the copyright death threats for 20 seconds first.
However, it won't strip out any copyright messages, distributor logos etc. that appear between pressing the "play main feature" button and the film actually starting. The way I deal with this is to rehearse the disc, making a note of the sequence of titles and logos that appears between pressing the play button and the actual movie starting. The cue sheet might look something like this:
Insert Disc > Select English > main menu (with sound).
Press start film, then:
Studio Canal Logo (with sound)
"Interviews do not represent views of studio" title
Canal Classics logo (with sound)
Actual film starts with Paramount logo, 37 secs after hitting play
Credit roll starts at 1'56'23"
Ends 2'01'26" - "© Bloody Awful Productions, 2009", holds in centre of screen; fade to black; music continues over black to 2'01'59"; two second pause then back to menu with sound.
So when the time comes to start, I hit play with a cardboard dowser in position over the lens and the audio muted. About 20 seconds in I start to take the lights down, and then after the last logo with sound (that I don't want to show) has faded out, hit unmute and remove the cardboard.
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Leo Enticknap
Film God
Posts: 7474
From: Loma Linda, CA
Registered: Jul 2000
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posted 12-15-2011 12:41 PM
quote: Bruce Hansen
CDs have the recorded layer on the back side of the disc (never scratch the back side of a CD, that will destroy the recording). DVDs have the recorded layer in the middle.
Sorry to be an irredemably anal geek, but that's not totally right. You're absolutely right in pointing out that CD-Rs are different from any other type of optical disc, in that in a factory pressed CD and a DVD (both factory pressed and consumer-burnt) the dye layer is sandwiched between two substrates (clear transparent discs), with the label on top of one of them. In a recordable DVD, the laser shines through the bottom substrate (i.e. the one without the label stuck on it) to burn and read it.
A CD-R or RW has just one substrate. On one side of the substrate a "pre-groove" track is carved into it to guide the burning laser. On top of that pre-groove track is the dye layer that is burnt by the laser. On top of the dye layer is a reflective layer, to ensure that the light does actulaly bounce. On top of that reflective layer is printed the label.
The bottom line is that unlike with DVD-Rs and BD-Rs, on which the only side you've got to be really careful about is the side through which the laser reads and writes, with a CD-R you've got to be very careful not to scratch either side, because if you scrape away a bit of label you may well take some of the actual recording layer with it.
This guide explains the chemistry in lots of detail.
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