What kind of artefact it is ?

jeffk · 31st October 2020, 19:24

Hi,

I'm doing a comparison between a VHS that a lab captured into a DVD years ago (left) and mine (right) with the same VHS source (My raw is at top).
I have a overall better definition but also serious yellow/blue halo, and "white border" arround people.

Chroma shifting as been done already (-6) and chroma denoise also with vsTemporalsmoother/ccd. What kind of artefact is it ?

Can this be caused by my VCR ?

Thanks !
(Link to full sized image https://rehost.diberie.com/Picture/Get/f/32380)

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Name: ski.01.jpg
Views: 55
Size: 120.4 KB

Emulgator · 31st October 2020, 19:47

VCR guilty ? I would guess yes.
I suggest to use a prosumer S-VHS deck for playback.
The upper prosumer Panasonics and JVCs are good for that, the ones that were more than 1500 DM (or 1000 GBP, or 1200 USD)
Was very happy with a NV-HS950, and still I am, very detailed picture while chroma still sits at its source line.
Just now working with a Panasonic AG-7750, this one saves the hardest TBC problems.

jeffk · 31st October 2020, 20:13

I dont have this kind of (big) artefact on other tape, its weird. But this tape seem to have worked better some time ago or on different device at least.

I'm using a S-VHS JVC HR-7955 (S-video) to a Magewell Pro Capture.

Or maybe the tape degraded during this few years. I dont know.

Sharc · 31st October 2020, 20:44

The white lines are probably halos from excess sharpening. First thing to do is to turn off any sharpener on your VCR gear.

Emulgator · 31st October 2020, 23:59

What Sharc said.
Tape degradation wouldn't look like that.
Do you work from a second (third) generation tape by any chance ?
Seeing chroma fallen this far apart, I mean.

jeffk · 1st November 2020, 01:07

I dont know about the generation of the tape. I'll look into it. It may be a copy of a copy etc... But I have the one that was given to the photo lab i'm pretty sure.

I will look into my VCR setting but as far as i remember i'm in EDIT mode en B.E.S.T off. (The 7955 doesnt have TBC tho)

Thanks for the help !

Emulgator · 1st November 2020, 16:59

The 7955 has Digipure, so a TBC and more:
Digital 3R Edge Correction. Video Stabilizer. Picture Control Edit/Soft/Sharp.
Maybe check those settings.

jeffk · 2nd November 2020, 02:08

Well I have the -MS version (french) and dont have this. Only EU/UK have thoses options.

31st October 2020, 19:24	#1 \| Link
jeffk Registered User Join Date: Oct 2012 Posts: 15	What kind of artefact it is ? Hi, I'm doing a comparison between a VHS that a lab captured into a DVD years ago (left) and mine (right) with the same VHS source (My raw is at top). I have a overall better definition but also serious yellow/blue halo, and "white border" arround people. Chroma shifting as been done already (-6) and chroma denoise also with vsTemporalsmoother/ccd. What kind of artefact is it ? Can this be caused by my VCR ? Thanks ! (Link to full sized image https://rehost.diberie.com/Picture/Get/f/32380)

31st October 2020, 19:47	#2 \| Link
Emulgator Big Bit Savings Now ! Join Date: Feb 2007 Location: close to the wall Posts: 1,544	VCR guilty ? I would guess yes. I suggest to use a prosumer S-VHS deck for playback. The upper prosumer Panasonics and JVCs are good for that, the ones that were more than 1500 DM (or 1000 GBP, or 1200 USD) Was very happy with a NV-HS950, and still I am, very detailed picture while chroma still sits at its source line. Just now working with a Panasonic AG-7750, this one saves the hardest TBC problems. __________________ "To bypass shortcuts and find suffering...is called QUALity" (Die toten Augen von Friedrichshain) "Data reduction ? Yep, Sir. We're that issue working on. Synce invntoin uf lingöage..." Last edited by Emulgator; 1st November 2020 at 00:00.

31st October 2020, 23:59	#5 \| Link
Emulgator Big Bit Savings Now ! Join Date: Feb 2007 Location: close to the wall Posts: 1,544	What Sharc said. Tape degradation wouldn't look like that. Do you work from a second (third) generation tape by any chance ? Seeing chroma fallen this far apart, I mean. __________________ "To bypass shortcuts and find suffering...is called QUALity" (Die toten Augen von Friedrichshain) "Data reduction ? Yep, Sir. We're that issue working on. Synce invntoin uf lingöage..."

1st November 2020, 01:07	#6 \| Link
jeffk Registered User Join Date: Oct 2012 Posts: 15	I dont know about the generation of the tape. I'll look into it. It may be a copy of a copy etc... But I have the one that was given to the photo lab i'm pretty sure. I will look into my VCR setting but as far as i remember i'm in EDIT mode en B.E.S.T off. (The 7955 doesnt have TBC tho) Thanks for the help ! Last edited by jeffk; 1st November 2020 at 01:11.

1st November 2020, 16:59	#7 \| Link
Emulgator Big Bit Savings Now ! Join Date: Feb 2007 Location: close to the wall Posts: 1,544	The 7955 has Digipure, so a TBC and more: Digital 3R Edge Correction. Video Stabilizer. Picture Control Edit/Soft/Sharp. Maybe check those settings. __________________ "To bypass shortcuts and find suffering...is called QUALity" (Die toten Augen von Friedrichshain) "Data reduction ? Yep, Sir. We're that issue working on. Synce invntoin uf lingöage..."

31st October 2020, 20:13	#3 \| Link
jeffk Registered User Join Date: Oct 2012 Posts: 15	I dont have this kind of (big) artefact on other tape, its weird. But this tape seem to have worked better some time ago or on different device at least. I'm using a S-VHS JVC HR-7955 (S-video) to a Magewell Pro Capture. Or maybe the tape degraded during this few years. I dont know.

31st October 2020, 20:44	#4 \| Link
Sharc Registered User Join Date: May 2006 Posts: 3,997	The white lines are probably halos from excess sharpening. First thing to do is to turn off any sharpener on your VCR gear.

2nd November 2020, 02:08	#8 \| Link
jeffk Registered User Join Date: Oct 2012 Posts: 15	Well I have the -MS version (french) and dont have this. Only EU/UK have thoses options.

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