[TriLUG] Recording Eric Raymond's Talk(s)

[Tanner Lovelace]

On Fri, 2003-02-07 at 16:15, Jeff Jackowski wrote:

> For LP mode, the tape is run slower, but the data format is the same. The 
> only degradation will be an increased error rate, which still won't happen 
> often, but it will happen maybe 2 to 5 times per tape. The rest of the 
> time it'll look the same as SP mode. Just have that playback problem to 
> work around.

Actually, Jeff, please look at the URL I posted previously (in Mozilla,
because Konqueror and Safari seem to give a 404 on it).  LP mode for
miniDV does *not* run slower, but it does adjust the width of the
tracks from 10 microns to about 6 microns.  If two different miniDV
players aren't perfectly aligned, then there can be problems.

See also http://www.videouniversity.com/dvformat.htm about a quarter
way down where it says: 

"The consumer-oriented DV uses 10 micron tracks in SP recording mode.
Newer camcorders offer an LP mode to increase recording times, but the
6.7 micron tracks make tape interchange problematic on DV machines, and
prevents LP tapes from being played in DVCAM or DVCPRO VTRs. Sony's
DVCAM professional format increases the track pitch to 15 microns (at
the loss of recording time) to improve tape interchange and increase the
robustness and reliability of insert editing. Panasonic's DVCPRO
increases track pitch and width to 18 microns, and uses a metal particle
tape for better durability. DVCPRO also adds a longitudinal analog audio
cue track and a control track to improve editing performance and
user-friendliness in linear editing operations. "

Cheers,
Tanner
-- 
Tanner Lovelace | lovelace(at)wayfarer.org | http://wtl.wayfarer.org/
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