Are these lines normal?

[Abas-Avara]

First time I captured a Digital8 video with DV interface, I thought the quality was horrible.
I opened a topic and users suggested me too deinterlace ( I found out about interlacing and just burn too DVD without Deinterlace), The DVD has progessive scan.

Now I captured VHS tapes with the same method (firewire passtrough) and I see lots of horizontal lines, I though the DVD player would remove them, but no. Here are screenshots of the video.



vlcsnap-2009-11-01-13h54m48s78.png

vlcsnap-2009-11-01-13h55m03s247.png

vlcsnap-2009-11-01-13h56m54s79.png

Is this another type of interlacing or is it just a bad capture?

[jagabo]

The herringbone artifacts are not interlace related. Could you post a short segment of the original DV AVI cap?

[Abas-Avara]

Here's a sample
http://www.wikifortio.com/750168/sample.avi

[kimco52]

I capture Digital 8 all the time direct with Firewire or through a DV device and don't have problems. Sometimes I go through a Panasonic switcher using S-Video and the output goes into a box that is connected via Firewire to the computer. And that has no problems either. I see similar to what you have when I have a bad ground or connection.

[jagabo]

That is definitely not an interlace problem (although the video is interlaced). I think you have some kind of high frequency analog noise between your setup. Try plugging everything in to the same power strip when capturing. Or record from the VHS onto tape without the firewire cable connected to the computer (the likely source of the high frequency noise). Then connect the firewire cable and capture from tape to the computer.

[Abas-Avara]

I captured everything with an different powerstrip (VCR and Camcorder connected on another powerstrip). Maybe that was the cause.

One other thing is, maybe it was the S-video cable?
Cause it isn't a S-VHS VCR, I used this



I will test it now and let you guys know.

[Abas-Avara]

I've done test results, I think the S video cable was causing the problem.

First (with S video)
vlcsnap-2009-11-01-16h06m15s27.png

Second (with RCA)
vlcsnap-2009-11-01-16h06m02s150.png

The second one is now interlaced and there arent horizontal lines so far I see, If you want I can upload a sample.

[jagabo]

If your VCR doesn't have s-video out you should use composite from the VCR to camcorder. Cheap composite to s-video converters produce poor s-video output with interference between the chroma and luma channels. The camcorder will probably do a much better job with the direct composite signal.

[Abas-Avara]

Thanks Kimco and Jagoba, the problem is solved. If I see in the futher problem I will let it know.

One more question, I wont use S video on that block but connect the RCA on that, that shouldn't be a problem right?

Or is direct RCA out better like this,

[jagabo]

There's probably not much difference between composite on the SCART connector and a direct composite output from the VCR. But, are those ports on the front inputs or outputs?

[Abas-Avara]

To be honest I've never tested those, cause I though the ports on the back where the best outputs (my logic, cables on the front don't look good for permemant use). But it's probaly input, cause on anther VCR I've it's input.

But if RCA isn't a problem on that block I use that. I was
curious of a scart converter would make quality worse.

[churchie04]

FYI,

I had the EXACT same issue a few years ago. Was using a composite->S-Video cable with a Hi8 camcorder going through a Panasonic DVX so I could do native DV.

Switched composite cable out, problems went away...

[Abas-Avara]

FYI,

I had the EXACT same issue a few years ago. Was using a composite->S-Video cable with a Hi8 camcorder going through a Panasonic DVX so I could do native DV.

Switched composite cable out, problems went away...

There should be a warning for this on the guides, I've never seen it.

before I sarted with everything I tested RCA and S-video I thought those lines were normal (interlacing) and looked sharper so I used S-Video . I hope the quality of some VHS tapes won't degree, cause some I've played several times to capture...