Archived from groups: rec.video.desktop (
More info?)
On Fri, 21 May 2004 02:36:38 +0200, Dan Mors <mebnm@yahoo.com> wrote:
>I have the .avi files resulting from the transfer from my mini DV
>recorder. But these files are really big!. Right now I do not know
>what format will I need in the future, so for now I'd like to
>transform these movies to any format that 1) gives me the flexibility
>of later converting these clips to a xvid/divx based avi or to mpeg so
>I can burn a SVCD and 2) keeps the files smaller than those I have.
There's nothing better than the original format, but there's only an
academic difference to a DVD at highest quality settings.
Given that, I keep the tapes if it's original live footage but I
wouldn't keep tapes of movies.
I back everything up on DVD because tapes can easily be damaged by
mechanical failure. Well done DVDs retain almost 100% of the quality
and are much cheaper than tape.
With an MPEG2 capable editor, you can later on cut these DVD files
without further quality loss, as long as you don't filter everything.
Only transitions have to be re-rendered but that's not a big deal. If
you recompress to lower bitrates, it's no problem anyway.
I usually edit DV with Studio9, but once captured I can also convert
right to MPEG2 (usually CCE Basic) and save the result along with the
..scn (scene information) file of Studio9, so I can open the MPEG later
on instead of the DV and start cutting right away. (It may be
necessary to patch the bitrate tag of the MPEG because some encoders
set it too high, so editing programs think they have to recompress dor
DVD compatibility. Use http://mitglied.lycos.de/dvdpatcher/ for this.)
Making a real DVD with menus from the raw footage has the advantage
that it can be easily previewed (set chapter marks every minute), but
it involves reassembling/remultiplexing of the VOB files when reading
back for editing.
Quality wise, highest bit rates allow for 1 hour per DVD. With
variable bit rate, 90 min should also be possible with no
disadvantage. Even 2 hrs are possible nearly lossless if the source is
not too crisp or noisy. Some results at my page (DVD part, CCE
encoding tests).
As the best target format will usually be DVD, you won't really lose
qualiity by mastering this way, at least if you use a good encoder.
Movies usually require much lower bit rates than your own live
footage, BTW.
Cheers
http://www.codecpage.com