Remove grain and color artifacts from DV camcorder

[klode]

Hi,
I have many DV recordings on my PC. But I never found a solution to removing grain and color artifacts from this device.

My Cam Corder is aSony GD-R721E with miniDV storage.

Now this is a little simple of what I mean about artifacts:

http://aiutoscuola.freeiz.com/demo.avi

Now, I see (for example) a vertical error diffusion, but in darker scene, I see color ghosts....

What do you think how can I make these recordings a great Masters????

Thanks in advantage.

[edDV]

Can't find a link to that model number.

The GD series are security type cameras right? How are you capturing this?

[klode]

Sorry... GR-D721E ...

For the Security Type Camera, what do you mean? I'm using Sony Capture through FireWire port of my ASUS motherboard.

Have you seen my short movie?

[hech54]

Google lists a GR-D721E as a JVC.....not a Sony.
Your video opened in VirtualDub with a list of errors and was almost un-playable.
The video would not open in AviDemux.

[guns1inger]

The few seconds I got (13.8 MB file ?) played fine in MPC HC, and looked like DV footage. I would need to see a much longer sample of a problem piece, but from you have posted so far I can't see anything particularly wrong.

DV is DV. Most DV cameras use rubbish lenses and in low light they are useless. You will always get sub studio DVD quality from them, no matter what you do. Any filtering you do to remove noise and artefacts comes at a cost, usually to clarity. Make sure your expectations are realistic before you go to much further and get disappointed.

However, again, longer samples that better represent your problem might get you better help.

[klode]

Another question: JVC VS Sony... which is better?

for guns1inger: there's nothing wrong... I can see color ghost in darkly scenes... but you're right! when I get some footage for you, I'll post in my webspace.

[jagabo]

The video you posted isn't DV AVI directly from the camcorder. It has been converted to uncompressed YV12. Post unmolested DV AVI. In VirtualDub:

1) File -> Open Video File
2) Video -> Direct Stream Copy
3) Mark in, mark out
4) File -> Save as AVI

That will save your clip without decompression or recompression.

I don't know what you mean by "color ghosts". Ghosting usually refers to a ghostly echo of something else in the video. Something like this:



Not the slight ghosting to the right of the objects. I don't see any of that in the sample. Your video does have some chroma noise. Small purple and green splotches. 8x point enlargment:



Strong chroma noise reduction filters can reduce that.

And, of course, you have interlaced video. Maybe that's what you mean by ghosting? If you don't deinterlace for display you will see double images whenever there is motion.

[edDV]

Google didn't respond to Sony GD-R721E but truncating to Sony GD-R got me this



Your file gave me this in Mediainfo. No where near DV.


VLC played it in step mode. Looked composite source to me but compressed to webcam level.

Lots of red herrings so I quit the game.

[hech54]

Another question: JVC VS Sony... which is better?

Nobody cares. What we do care about is what camera this footage came from.

[klode]

edDV: I have cut my DV avi with virtualdub. Maybe this is the result of your check.
jagabo: yeah, that's what I mean color ghosts... So, chroma noise reduction, ok!

So, I have another little cutted footage (from DV AVI, cutted with virtualdub in Direct Stream Copy).

http://aiutoscuola.freeiz.com/demo_ed.avi

I want to reduce the error diffusion like in this little footage... I think here there's not many color ghosts....

[klode]

Of course...
THANKS AT ALL OF YOU for your Supply!!!!!!!

[budwzr]

If EdDV's model number search is correct, this could be secretly mounted, and....... OMG!

[jagabo]

So, I have another little cutted footage (from DV AVI, cutted with virtualdub in Direct Stream Copy).

http://aiutoscuola.freeiz.com/demo_ed.avi

That's uncompressed RGB, not DV. DV AVI file attached.

[klode]

Sorry... you are right!

This NEW version is a VirtualDubMod cut from my avi DV footage.

demo_dv.avi

Another info: I've found (but not saved any link!) an AviSynth script that removes all DV artifacts, but now neither with google I cannot re-found this script......

Any other solution?

I mean, error noise diffusion due CCD camera, or color ghost found by jagabo.......

I wish this is the right once!!!!!

[jagabo]

Your problem isn't DV artifacts. It's a camera with poor performance under low lighting. The usual noise reduction filters apply. McTemporalDenoise() for example.

The camera also has a problem where the two fields have different colors. One has a green cast, the other a purple cast.

[klode]

magic!!! thanks jagabo!

And then... how can I resolve this issue, about your opinion?

[jagabo]

Try something like:

AviSource("demo_dv.avi")
ConvertToYV12(interlaced=true) #may not be necessary depending on your DV decoder

SeparateFields()
even=SelectEven().ColorYUV(off_y=-20,off_v=4)
odd=SelectOdd().ColorYUV(off_y=-20,off_v=3)
Interleave(even,odd)
Weave()

MCTemporalDenoise(settings="high", interlaced=true)