DVD-Software.info

[mary]

I am legitimately reuthoring and making new DVD's for a television
show I work with. The producer sends the tapes to the station but
burns a very generic DVD for me. I am supposed to add a custom menu,
print the DVD's, etc...

Currently my method includes
1. editing the vob files with Chopper X (said to be lossless)
2. merging any vob files as nec to one large vob file with DVDtool
3. reauthoring in ArcSoft Showbiz using 100% as my compression value

My second test appears to be as good as the original, but I am
concerned that the step where Showbiz "produces" my vob file might be
degrading it somehow.

I am a newbie to all this, and any comments or suggestions are
welcome.

Thanks !
Mary

[Smarty]

Mary,

I am not familiar with ArcSoft Showbiz specifically, but it is entirely
possible to reauthor a DVD without adding additional degradation. The vob
files contain, among other things, the video and audio programs which can be
extracted and used to create another DVD with new menus. It is up to the
authoring program and the settings chosen by the user to determine whether
the 2nd disk will or will not be degraded. If the program (in this case
Showbiz) leaves the content intact at the setting you have selected ("100%
as my compression value") then the resulting disk show look identical. If
it, without telling you, changes the compression by any of a variety of
methods (from VBR to CBR, from CBR to VBR, from one bit rate to another, by
using different motion estimation parameters, etc. ,etc.,etc.) then the
reauthoring you are doing will force a recompression to take place with some
form of degradation in the process.

Typically evidence of such recompression would be the following:

1.Visible and/ or degradation when viewing the 2nd DVD (which you apparently
are not experiencing).

2.A different (lower) bitrate in the 2nd disk when compared to the first (as
measured using a bitrate viewer available as freeware on the web).

3).A long reauthoring time when creating the new VOB, since truly identical
VOB output will not require the time-consuming step which otherwise occurs
when recompressing takes place. (The new VOB should be written out to the
disk at about the normal disk writing speed, taking maybe a few minutes to
write a 4.7 GB VOB file as opposed to tens of minutes to recompress and then
output the new VOB).

4). The resulting VOB file(s) differ in their total size in any appreciable
way from the original (assuming you have not edited out any content when
reauthoring).


Since you have not seen any degradation, you can judge for yourself using
the other 3 methods whether the output file is indeed the same.

Those of us who routinely use TMPGE DVD Author to do precisely what you are
doing (all in one program!) find that all 4 conditions stated above do not
occur. Instead, the new VOB is created very quickly, has the same size as
the original, looks the same with a bitrate viewer, and, most important,
looks and sounds exactly the same as the original.

Hope this is helpful.

Smarty



"mary" <webiedesign@gmail.com> wrote in message
news:12e74d9f.0410281745.2d0c191d@posting.google.com...

[Smarty]

Mary,

Minor typo.....

item 1 in my prior reply should read:

"Visible and/or audible degradation........."


Smarty


"mary" <webiedesign@gmail.com> wrote in message
news:12e74d9f.0410281745.2d0c191d@posting.google.com...

[mary]

Thank you, Thank you - Smarty !

Mary

[Smarty]

Glad to help!


"mary" <webiedesign@gmail.com> wrote in message
news:12e74d9f.0410290544.79970063@posting.google.com...