Re: [MLUG] video compression

["Ryan Thornton" <EMAIL:PROTECTED>]

Well, I'm speaking of HDV and I didn't want to compress the resolution
to DVD resolution.

http://en.wikipedia.org/wiki/HDV
http://www.hv20.com/
www.vimeo.com has a nice hv20 channel.


"As a consequence of the fact that HDV uses the interframe MPEG-2 GOP
(group of pictures) structure instead of a solely intraframe
compression system, native editing of HDV footage differs technically
from the native editing of DV footage. In DV, frame-accurate splicing
does not disturb the surrounding video because each frame of the video
is stored as a self-contained unit. In HDV, splicing always introduces
distortion at the splice points, due to the interdependencies between
groups of video frames."

Really, it probably depends on what the footage is...  goofing around
I'll probably just delete the stuff.  Baby first step will probably or
neat landscape vistas will probably stay with original qualily..
intermediate things will probably have some compression.

We got the HD video because we wanted to save high quality video in
the first place.

I get tapes < $3 so for now that's cheap enough.  The alternative or
backup may be removable 250gb hds in removable drive bays.

-- Ryan

On Jan 7, 2008 1:55 PM, Mike Miller <EMAIL:PROTECTED> wrote:
> On Mon, 7 Jan 2008, Mark Rages wrote:
>
> > The best way to archive the tapes is with external hard drive
> > enclosures.  (or LTO backup tapes, if you've got lots of data).  A 1TB
> > USB drive is less than $250.  You should store at least two copies,
> > using disks of different manufacturers, in two physical locations. Every
> > five years, copy the data to new disks.  The data will be lost when you
> > stop doing this.
>
> Wow.  That's pretty amazing.  So it's at least cheaper to use external
> HDDs than the original tapes.  (I paid $5/tape, I think, which is almost
> twice what I would pay for the same volume in external HDD).  I'm
> disappointed that there isn't better lossless compression.  I haven't seen
> the 1TB for less than $250, but I believe you.
>
>
> > DV-wrapped-in-avi is not my favorite format because it stores many
> > pieces of information in two layers in the stream.  But it's probably
> > not worth demuxing out the original DV data, it's just some Microsoft
> > brain-damage to deal with.
> >
> > The most common workflow is probably like this:
> > record DV in camera --> capture DV to computer --> edit on computer
> > --> export edited data as an MPEG-2 DVD-Video.
>
> Interesting.  I've been using Pinnacle Studio 9 to get the video from the
> tapes (via firewire to the camera).  I didn't realize that there was
> another format that could have been used.  Pinnacle Studio uses the AVI
> format but maybe there were other choices.
>
> Mike
>
>
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