Digital glitch while digitizing onto external drive (24p footage) at DVinfo.net

Jose Cassella · July 23rd, 2005, 06:13 PM

Michael, I had another small question.

I am digitizing my 24p "standard" (not advanced) footage to Avid Adrenaline.

I am going firewire from a regular DV SR-VS30 JVC deck to the computer
and USB2 out to a maxter 200 gig external harddrive.

The footage seems to run fine on the monitor, but during a couple of spots, pretty random, we got a sudden, light digital noise.
It looks like a digital glitch, sort of like when you loose signal on your digital cable. Big white squares withing the image.

No sound, or image dropout, so it doesn't seem like a regular dropout.

Now, when we play it back from the external drive, the noise is much, much lighter, almost invisible.

Could this be the tape?, the system?,the configuration of the system, the deck's tape heads?

Any suggestion would be great.

Jose

Boyd Ostroff · July 23rd, 2005, 06:39 PM

Moderator note: Jose, I removed your duplicate post from the XL2 forum since this violates our rules:

http://www.dvinfo.net/conf/announcem...ouncementid=23

If you feel you would get a better response in that forum then please let me know and I can move this thread, but I think this is probably the best place for it.

Dan Euritt · July 24th, 2005, 01:39 PM

jose, fwiw, dv footage is digital bits of 1 and 0, so there shouldn't be any gamma/exposure differences between what you see, regardless of where it is in the chain... it's the exact same footage everywhere.

the gamma/exposure problem might be one of gamma setting differences between monitors, but the actual blockiness is a lot more disturbing.

Glenn Chan · July 25th, 2005, 02:37 AM

1- Are you capturing with [extra] compression or with the Avid codec?
(To save yourself effort, stick with DV and IEEE/firewire transfer.)

2- Dropouts:

Do they look like:
http://www.adamwilt.com/pix-defects.html

If you're getting dropouts, try capturing with a Sony DSR-1800 (it has tracking) or the camera that originally recorded the footage. If the dropouts are not that often, you can use Photoshop magic to paint them out.

Alternative: There are various causes to dropouts, and you could try fixing them. One is to clean the deck's heads (DON'T use q-tips; read instructions).

July 23rd, 2005, 06:13 PM	#1
Jose Cassella Tourist Join Date: Aug 2003 Location: Orlando, FL Posts: 4	Digital glitch while digitizing onto external drive (24p footage) Michael, I had another small question. I am digitizing my 24p "standard" (not advanced) footage to Avid Adrenaline. I am going firewire from a regular DV SR-VS30 JVC deck to the computer and USB2 out to a maxter 200 gig external harddrive. The footage seems to run fine on the monitor, but during a couple of spots, pretty random, we got a sudden, light digital noise. It looks like a digital glitch, sort of like when you loose signal on your digital cable. Big white squares withing the image. No sound, or image dropout, so it doesn't seem like a regular dropout. Now, when we play it back from the external drive, the noise is much, much lighter, almost invisible. Could this be the tape?, the system?,the configuration of the system, the deck's tape heads? Any suggestion would be great. Jose __________________ KOKI

July 23rd, 2005, 06:39 PM	#2
Boyd Ostroff Wrangler Join Date: Dec 2002 Location: Mays Landing, NJ Posts: 11,801	Moderator note: Jose, I removed your duplicate post from the XL2 forum since this violates our rules: http://www.dvinfo.net/conf/announcem...ouncementid=23 If you feel you would get a better response in that forum then please let me know and I can move this thread, but I think this is probably the best place for it.

July 24th, 2005, 01:39 PM	#3
Dan Euritt Trustee Join Date: Mar 2004 Location: Carlsbad CA Posts: 1,132	jose, fwiw, dv footage is digital bits of 1 and 0, so there shouldn't be any gamma/exposure differences between what you see, regardless of where it is in the chain... it's the exact same footage everywhere. the gamma/exposure problem might be one of gamma setting differences between monitors, but the actual blockiness is a lot more disturbing.

July 25th, 2005, 02:37 AM	#4
Glenn Chan Inner Circle Join Date: Jun 2003 Location: Toronto, Canada Posts: 4,750	1- Are you capturing with [extra] compression or with the Avid codec? (To save yourself effort, stick with DV and IEEE/firewire transfer.) 2- Dropouts: Do they look like: http://www.adamwilt.com/pix-defects.html If you're getting dropouts, try capturing with a Sony DSR-1800 (it has tracking) or the camera that originally recorded the footage. If the dropouts are not that often, you can use Photoshop magic to paint them out. Alternative: There are various causes to dropouts, and you could try fixing them. One is to clean the deck's heads (DON'T use q-tips; read instructions).