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| The Zep Man |
| Posted: Nov 12 2002, 03:05 PM |
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Unregistered
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When I am recording an AVI file, and when I play it, the frames
are "fading" over each other...
How can I resolve it? I KNEW how to do it, but I forgot... 
-Zep |
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| Morsa |
| Posted: Nov 12 2002, 05:07 PM |
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Moderator of the Vdub support board
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I don´t know, if you´re saying that the frames are blending it may be caused by a temporal smoother or something that kind.
Capture with no filters and compress with Huffyuv. |
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| The Zep Man |
 Posted: Nov 12 2002, 06:16 PM |
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Maybe I used the wrong words 
I will give it in an example:
In my free time, I love to record and save Sailor Moon episodes, and I
also create subtitles for them so deaf and people who can't hear very
good in my country can still follow the show (I do NOT get any money
for this, so don't say I am having a cheap way to get money... people
ONLY need to pay for the cassettes/CD's, and even with that I am
loosing money while I send it to people!)
My first episode is almost completed and is kicking ass, but...
I tried to record another Sailor Moon episode today, and I thought
I used the same modifications to VDub as I used before, here I will
summon those changes:
VirtualDub 1.4.9.2 (the VCR+SYNC edition)
Audio Compression: PCM 44,100 Hz, 16 bit, Stereo (172 KB/s) and an Audio buffer size off: 36000
Video Compression: DivX 4.12 (2048 kbps)
Video Resolution : 384x288, RGB 24 Bit, 25 fps
Timing : resample audio data dynamically to match video clock
Now I THINK these are the options I used in the previous capture (which worked fine)...
Now, what is the problem?
When I record it now, with these options, everytime a new frame is drawn
somehow the parts which moved from the previous frame are still a bit
visible in the new frame...
If you got more questions or if you need more info, reply...
-Zep |
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| The Zep Man |
 Posted: Nov 12 2002, 08:26 PM |
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This is really... weird...
As soon as I turn off "Noise Reduction" the "fading artefacts" don't
appear... how odd... it has worked before...
-Zep |
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| fccHandler |
| Posted: Nov 12 2002, 08:41 PM |
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Administrator n00b
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Sounds like you're using way too much temporal noise reduction. 
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May the FOURCC be with you... |
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| The Zep Man |
| Posted: Nov 12 2002, 08:47 PM |
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Yeah, I just found out to...
OK, now the big momma question: what is a recommended "treshold" range to use the Noise Reduction within a cartoon?
EDIT: Ow yeah, it was NOT "temporal"... I used the included Noise Reduction.
-Zep
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| fccHandler |
| Posted: Nov 12 2002, 09:08 PM |
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Administrator n00b
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There is no included "Noise Reduction" filter, unless you are talking about using Noise Reduction during capture; that NR is dynamic (i.e., temporal), and is the cause of your problem.
Sorry, no one can tell you what the best threshold will be; only your own eyes can judge.
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May the FOURCC be with you... |
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| The Zep Man |
| Posted: Nov 12 2002, 09:33 PM |
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Thanks for the quick response 
Still, if I use another (not included) noise filter during capture, while the
"Noise Reduction during capture" is turned off, I could get the same effects...
So you COULD say it is a filter... but it is included in the GUI...
Again thx,
-Zep |
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| Kippesoep |
| Posted: Nov 13 2002, 03:47 AM |
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Moderator of the Virtualdub support forum
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Posts: 447
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Joined: 6-October 02
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I originally wrote that as a filter and Avery later optimised it and included it directly into the capture code. The threshold value is used when comparing a frame to the previous frame. If the difference of a pixel's colour and its colour in the previous frame is below the threshold, it is considered to be caused by noise and locked into place instead. The lower the threshold value, the less pixels will be locked and the less artifacts will occur. It'll also remove less noise. Personally, I find a threshold of 6 to be optimal. |
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| The Zep Man |
 Posted: Nov 13 2002, 06:36 AM |
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Thx Kippesoep,
Erg bedankt voor je antwoord 
Sorry, couldn't resist talking dutch, Kippesoep, thanks for your response...
Especially with cartoons it is a bit of a bitch to set it very good, I am gonna try it out 2night with a value of 6...
But ehm... what do you mean with "6"? Does it mean I need to move the
slider 6 dots to the right (from the minimum)?
-Zep
Edit: Sorry, some grammar errors
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| Kippesoep |
| Posted: Nov 13 2002, 06:48 AM |
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Moderator of the Virtualdub support forum
Group: Moderators
Posts: 447
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Joined: 6-October 02
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I'm not exactly sure about the built-in version (since I always use the filter version, which has a numeric display next to the slider), but it would be either the 6th or 5th notch from the left. |
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| Morsa |
| Posted: Nov 13 2002, 01:21 PM |
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Moderator of the Vdub support board
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Joined: 9-September 02
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For better results it is recomended to capture to an uncompressed or to a non losy format.
And not to apply any filtering. |
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| The Zep Man |
| Posted: Nov 13 2002, 05:31 PM |
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Hey Morsa,
Like you may have read in one of my earlier posts, I am doing
some stuff with subtitling. Now you HAVE to remember that I am not
a rich guy, I am just trying to do something for other ppl. You MAY
understand that I don't have 100GB free for 20 minutes of video data.
And because the CPU's of today are fast enough, I am capping DIRECTLY in
DivX, just to save some space. It is already a shame that direct MP3 capture
is instable (this is NOT VDub's fault), so I won't sacrifice the pleasure of
capturing directly in DivX.
And as a quick note, my last capture has got VERY good quality, while
I use directly DivX and Noise Reduction.
It is not that I want to record DVD's or something.
-Zep |
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| Morsa |
| Posted: Nov 13 2002, 05:44 PM |
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Moderator of the Vdub support board
Group: Moderators
Posts: 640
Member No.: 246
Joined: 9-September 02
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As you want. |
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