Hi Qwerk
I seldom post messages to the groups, so let me start by saying how much I
have appreciated your sharing of, what is to me, some rare and classic
videos. The format that you choose to post them in is of secondary
importance to me, considering even getting the chance to see them at all is
more than I would otherwise have had. I do have broadband though, so I can
certainly sympathize with those still struggling on dialup to download
large video files. They shouldn't despair though, as the more people who
download your video now, the greater the chance that it will be reposted
again in the future, perhaps at a time when those on dialup have moved to
broadband themselves, or else when a more efficient video codec has come
along, enabling the video to be re-encoded to a smaller file size and
reposted.
>Hello, let me explain. My Adrian version is on a DVD as .vob-
>file. I've converted it to a .avi-file because the quality is
>better than converted to an .mpg-file. I would avoid a big
>loss of quality.
Just curious, Qwerk, but how do you convert the VOB file to an avi usually?
I know from my own experiences that this process can be a bit of hit and
miss at times with all the software and guides that are out there.
Just for your info (in a take it or leave it kinda way :-), I checked
Frankie(a).avi and can see that it was encoded with DivX 5.03 @ 720 x 576
and a video bitrate of 3942 kbps. That video bitrate does seem fairly high
for a DivX encoded file, in fact it's closer to a bitrate that you would
normally find in an MPEG2 video file. Typically, about half that rate is
the absolute most that you would need for hi-quality DivX. I've seen some
people encode video sourced from a DVD down to between 700 and 800kbps,
just so they can fit it on one CD, but I think you can start to notice the
drop in quality by that stage. You're right in that re-encoding a DVD as
MPEG1/2 at a lower bitrate probably would see a noticeable reduction in
quality, and posting the original MPEG2 video from the DVD would likely be
a much larger file. Do you know what the original bitrate of the MPEG2
video inside the VOB was?
>If I would have a program to split .vob-files I would have
>done it, but I never have found a such programm as freeware.
Split as in demux the video and audio out into separate files? I think
ifoedit does that. I know that it muxes MPEG2 video and audio together and
authors VOBs at any rate because I use it to do just that. VOBs are just
container files, much like (the now ancient) avi files are. You can
probably find info about other free tools (PgcDemux, ReJig, VobEdit) that
do demuxing of VOB files here: http://www.videohelp.com/tools?s=111#111
For easy re-encoding, I've just started using the latest version of AutoGK
to re-encode MPEG2 video that I've captured via digital TV, and I must say
that I've been very impressed with the results so far. 2.5GB compressed
down to 350MB without any noticeable loss in quality, and believe me I'm a
quality freak too.
AutoGK basically simplifies the whole process of converting from an MPEG2
source to DivX (or Xvid), and you don't need to worry about demuxing as it
does that automatically as well. You select your video source (which can be
a standard mpeg2 program stream file, an .ifo and its accompanying vob's
from a dvd, or even a .ts mpeg2 transport stream), then the desired audio
stream if the source file has more than one present, your desired target
size for the avi file (in either number of CDs, megabytes or even just a
desired quality level) and AutoGK will go off and automatically do all the
interaction with other well known freeware tools (which are included in the
AutoGK distribution such as virtualdub, besweet etc) to scan the video and
make all the appropriate settings (you can force it to use particular
settings too) for the encoder so that at the end of the process you will
get the best quality possible in the size that you're after. It's by no
means the only tool that does this, but if you're after a simple, *free*,
no fuss frontend to video conversion, then it's certainly worth a try.
I know you didn't solicit any help, so you can tell me to mind my own
business if you like, but you seem like a very easy going sort of a guy, so
I don't think this message will trouble you. If you're having fun doing
what you're doing, then that's the important thing. No complaints on this
end. ;-) Please feel free to ping me in this group if you have any
questions that you think I might be able to help you with, or I may be able
to arrange an email addy to give you if you would prefer that.
All the best,
uw
|
| Follow-ups: | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
|