[MacDV] Video Import Problems

[R B Williams]

I have seen this often when playing a tape for capture on a different deck from where it
was recorded. If the head alignment between machines doesn't match, then you get info
from adjacent frames as "edge trash". (We forget that even digital signals are still
coming from a magnetic path on tape layed down by a spinning head - easily 30 year old
technology). To prove that this is indeed the issue, play back from the camera that
recorded the footage and see if the artifact disappears.

This is not the same as the tracking adjustment that most DV machines do automatically.
Alignment issues are caused by changing the angle of the tape to drum contact. It
usually comes from a slight bend in a tape guide that will require partial disassembly
to correct. We see many more Samsung & JVC cameras that need adjustments over time,
while Canon units stay within specs even after a fall. Not an endorsement, just an
observation.

R.B.

Richard Gilmore wrote:

> We've got a JVC HR-DVS3U VCR connected to a G4, OSX 10.3, iMovie 3, via a FW
> cable and sometimes when we import video there is a line at the bottom of the
> picture. It's a little hard to describe but the video is there with sound that's
> ok, except for this line at the bottom of the picture. It looks like it contains
> video information and it moves with the picture. There doesn't seem to be a way
> to remove it and it shows up on the DVD when you burn it. Does anybody know what
> this is and how to correct the problem?
>
> thanks
>
> Richard
>
> ----------
> <http://www.themacintoshguy.com/lists/MacDV.html>.
> Send a message to <MacDV-DIGEST at themacintoshguy.com> to switch to the digest version.
>
>  XRouter | Share your DSL or cable modem between multiple computers!
> Dr. Bott | Now $139.99      <http://www.drbott.com/prod/xrouter.html>
>
>    Cyberian   | Support this list when you buy at Outpost.com!
>    Outpost    |         http://www.themacintoshguy.com/outpost.shtml
>
> MacResQ Specials: LaCie SCSI CDR From $99! PowerBook 3400/200 Only $879!
> Norton AntiVirus 6 Only $19! We Stock PARTS! <http://www.macresq.com>