RGB shimmer on VHS output?
 

I'm on a rather long and winding road toward backing up my family's vhs tapes. I have a Toshiba vcr but wanted something better for the job, so I decided to purchace a Samsung GVR-S960 on ebay. The problem is I'm not really happy with the output.

It seems to have constant red green and blue colouration travelling across the picture. The Toshiba seems to suffer too but it's more pronounced on the Sanyo.

Here's an example video where I hope you can see it:
https://drive.google.com/open?id=0B6...Uxwd2wzR0U3VEU

Here's a couple of stills showing the effect:
https://drive.google.com/open?id=0B6...Gc5MEd2NUl6NmM
https://drive.google.com/open?id=0B6...WdsWERFWFpBd2M

I changed the hue in this one to make it more obvious:
https://drive.google.com/open?id=0B6...2g1dE5sazltOGs

Is this something I'll have to live with to a lesser or greater extent with vhs, or can it be eliminated completely?

Many thanks

with a better player (s-vhs jvc/pana) you should get much less chroma noise
with the vdub filter camcorder color denoise you can remove some of it without bad side effects, have a look here:
http://acobw.narod.ru/

Thanks for that, and it's good to know the correct term for it. :D

I'm a bit disappointed the visual quality isn't better, is does look like it's had a hard life though so perhaps it's just this machine.

I took a look at the drum head and there's a dull line of wear along it: https://drive.google.com/open?id=0B6wplXOsmxNqMmY0VjAzVjJOZ1U

Could this be a contributary factor, or at least is it new head time?

Please attach all sample images and clips to the forum.

What you see is "chroma noise", and it looks to be caused by lack of flying erase head on a reused tape. Most of this can actually be removed in software, but it's better to remove it in hardware. See attached sample. Hardware removal is far more accurate, and can often remove 100% of the issue. Software is maybe 90% accurate at best.

You need a better VCR. Not only does this clip have chroma problems, but timing/timebase issues. Straight lines are wiggly, but should not be, and would not be in a better JVC/Panasonic S-VHS VCR.

Thanks lordsmurf, I've attached all as requested.

Looks like I'll give up on this machine then and return it, bit of a shame as it's great build quality and has some nifty features but it looks like this particular one has had its day.

For the next one I'll have to choose something a little more conventional :)

Oh, so that was the VCR, and not the tape? I just assumed it was the tape at fault. :smack:

Yeah, it seemed where there was chroma noise on the tape it was definitely more pronounced on the Sanyo. I wouldn't mind getting hold of a less abused model to check out the quality.

Incidentally it seemed to have a full-frame TBC which also worked on pass-through. Perhaps the lack of a line TBC goes some way to explain the issues you mentioned.

MP4 is smeared.
Wrong feeder

1.Capturen in video with Lagarith
2.Filtern with Avisynth and VDub
3.codieren in MP4 [p or MBAFF]

Here's a little test comparison....bevore and after
It would be better if the material is present in Lagarith YUY2

That's a nice improvement there Goldwingfahrer!

I've not really looked into the whole improving the capture side of things, I seem to have got distracted by the hardware :laugh:

I've always had a preference to capturing with OBS and x264, it is worthwhile switching over to Lagarith encoding?

For what it's worth here's the same video I uploaded to Youtube a little while back, which was pretty much a straight capture from the Toshiba vcr.

https://www.youtube.com/watch?v=hg2d4Kz7AT8

Yes, of course, if you capture with VirtualDub.

I capture almost always directly in uncompressed.
Then is filtered.

Then in mpeg2 or in MP4
Depending on customer requirements.

Most I just need to capture, anything to make the customer himself.
For I have for capturing the best recorder.
------------------------------
Youtube has since re-encoded.
Something unfortunate quality
... Video = 450 x 360 with 939 kbps
Watch again = OK ... but save so = No
----------------------
addendum

have just loaded the 480P version.
Looks better even if the data rate is low.

Lagarith vs. Huffyuv is preference, and largely based on codec use. For example, I can't easily instal Lagarith on Linux or Mac, which I do use at times. Huffyuv is also easier on the CPU, which can matter for single-core systems.

my condolences
:huh1: :eek:

Yes, yes. :laugh:

Final Cut Pro and DVD Studio Pro are the only reasons. Work on Windows, move to Mac, move back to Windows.

Thanks guys. Clearly I've got a lot to learn, which I hope to do once I'm over my hardware fixation :D

I use both Macbook and PC, and Macbook's Bootcamp as there's only Windows drivers for the XCapture-1. The Macbook was the better choice for capturing over my aging PC but I recently got a Xeon cpu that's compatible with my motherboard so the PC's now likely better for multi-threading.

I much prefer Windows thanks to years of experience but got the Macbook to wean myself off the PC and learn something new :)