Here's what John D99 wrote on 8/31/09:
> I did a lot of av recording on dvd-rw discs, then switched over to dvd+r
> discs.
> Same machines, same type of material being copied, all at slp.
> My impression is that the video is noticebly better on the dvd+r copies than
> on the dvd-rw's.
> Is there some tech basis for this, or am I just imaging it?
> Thanks
You are imaging it. Or imagining it, for that matter.
The reason is simple: they are digital copies, and a bit is a bit.
Unless you changed your methods, of course. For instance, if your
DVD+Rs are dual-layer, you might be using much less compression in
copying your video to DVD. (There are no dual-layer DVD-RWs or DVD+RWs,
AFAIK.)
On Mon, 31 Aug 2009 17:24:23 -0700, Gene E. Bloch
<letters@someplace.invalid> wrote as :
>
>The reason is simple: they are digital copies, and a bit is a bit.
True!
>Unless you changed your methods, of course. For instance, if your
>DVD+Rs are dual-layer, you might be using much less compression in
>copying your video to DVD. (There are no dual-layer DVD-RWs or DVD+RWs,
>AFAIK.)
Dont know if others have come to a similar conclusion but I found that DVD+R
disks are far less robust in longevity than DVD-R ( my tests were done on
8x disks exposed to warm conditions and daylight, indeed I could kill a
DVD+R disk in sunlight in 3 days - a very severe accelerated test condition!
Charlie+
On Thu, 03 Sep 2009 07:18:35 +0100, Charlie+ <charlie@xxx.net> wrote:
>On Mon, 31 Aug 2009 17:24:23 -0700, Gene E. Bloch
><letters@someplace.invalid> wrote as :
>
>
>>
>>The reason is simple: they are digital copies, and a bit is a bit.
>True!
>>Unless you changed your methods, of course. For instance, if your
>>DVD+Rs are dual-layer, you might be using much less compression in
>>copying your video to DVD. (There are no dual-layer DVD-RWs or DVD+RWs,
>>AFAIK.)
>
>Dont know if others have come to a similar conclusion but I found that DVD+R
>disks are far less robust in longevity than DVD-R ( my tests were done on
>8x disks exposed to warm conditions and daylight, indeed I could kill a
>DVD+R disk in sunlight in 3 days - a very severe accelerated test condition!
>Charlie+
I have actually used an erase method that worked with the 4x +RW I
had (at that time) to erase them so that they appeared blank (like
new).
I put them in the oven at 100 degC for 15 minutes!
It gave repeatable results with a number of disks.
That did not work with the 4x -RW disks I tried, nor with my x8 +RW
disks.
(The method was useful when both the standalone recorder and PC writer
reported the disks as useless.)
I don't know if my observation can lead to conclusion about generic
differences in robustness between '+' and '-' or if the unsuccessful
erase of 8x disks simply shows that differently manufactured disks
have different properties.
/Jan
On Thu, 03 Sep 2009 19:31:23 +0200, Jan B <nospam@nospam.se> wrote as :
>I put them in the oven at 100 degC for 15 minutes!
>It gave repeatable results with a number of disks.
>
LOL
Why not put them in a shredder - quicker and cheaper!
C+
On Fri, 04 Sep 2009 07:31:52 +0100, Charlie+ <charlie@xxx.net> wrote:
>On Thu, 03 Sep 2009 19:31:23 +0200, Jan B <nospam@nospam.se> wrote as :
>
>
>>I put them in the oven at 100 degC for 15 minutes!
>>It gave repeatable results with a number of disks.
>>
>LOL
>Why not put them in a shredder - quicker and cheaper!
Maybe you are thinking a step ahead of me, but in case you just
misunderstood:
The disks where erased so I could record on them again
/Jan
dvd+r versus dvd-rw question 
Linear Mode
