Author Topic: Resize effect  (Read 3864 times)

Avi17

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Resize effect
« on: March 11, 2012, 09:10:02 PM »
I'm a new user of avidemux.
First, it wouldn't open avi-dv  files captured by digital SONY camcoder and Windows Live

Had to first perform direct stream copy by VirtualDub.

I then used avidemux to crop and resize the source to original 720x576. Everything looked nice at first glance but then I noticed nasty distortions at those moments when camera moved fast. Tried belinear,lanzcos methods ... The effect only appears when I use resize filter.

VirtualDub performs crop&resize perfectly without those artefacts.

Can anyone comment on this ?

styrol

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Re: Resize effect
« Reply #1 on: March 11, 2012, 10:42:37 PM »
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First, it wouldn't open avi-dv files
Try Avisynth input via AVSProxy: http://www.avidemux.org/admWiki/doku.php?id=using:avsproxy

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I noticed nasty distortions at those moments when camera moved fast. Tried belinear,lanzcos methods ... The effect only appears when I use resize filter.
And which filter did you use? MPlayer Resize or Resize (Avisynth). And you don't talk about artefacts caused by non-existent deinterlacing of interlaced source material?

Avi17

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Re: Resize effect
« Reply #2 on: March 12, 2012, 04:50:06 PM »
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Try Avisynth input via AVSProxy: http://www.avidemux.org/admWiki/doku.php?id=using:avsproxy
OK. I will when I figure out what it is and where I can get it (the only link there is broken). Meanwhile, I looked inside those source files. The original had "iavsdvsd", looks like Type 1 DV, while the one produced by VirtualDub has "vidsdvsd" (Type 2 DV ?). Audio was converted from 2x32kHz to 2x48kHz. What I can't understand, if AviDemux can't handle DV Type 2 source why doesn't it just say that, and not "Attempt to open ... failed. Can't open ...". I also tried to convert DV using DVConverter (Type 1 to Type 2 converter). It says "...not DV type 1 file" :(


Quote
I noticed nasty distortions at those moments when camera moved fast. Tried belinear,lanzcos methods ... The effect only appears when I use resize filter.
And which filter did you use? MPlayer Resize or Resize (Avisynth). And you don't talk about artefacts caused by non-existent deinterlacing of interlaced source material?
[/quote]
I used both, and different methods, the effect is the same. The artifacts don't look like coming from interlacing, they are multiple lowfrequency horisontal shifts. Vertical structures in the video become wavy, as I said only whe camera moves fast enough.

I also tried to deinterlace video first using VirtualDub. AVidemux just crashes when trying to open any such file ...

Jan Gruuthuse

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Re: Resize effect
« Reply #3 on: March 12, 2012, 05:32:41 PM »
Sony DV is handled by avidemux. It all depends on how you transfer the sony dv from/and your camera, I suppose. Done by IEEE 1394 (firewire) kino 1.3.4 it gives me see attached screenshot:

on windows you could get iEEE 1394 to work with:
WinDV: http://windv.mourek.cz/
Scenealyzer: http://scenalyzer.com/ No longer free to use, still trial available for 30 days

sample: 15.27 MB: https://rapidshare.com/files/3921115297/dotje001.avi

Avi17

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Re: Resize effect
« Reply #4 on: March 12, 2012, 08:05:45 PM »
Thanks, I'll try it, but for some reason, so far I was more successfull with USB. 

Here is a sample of (crop and) resize effect.

http://files.mail.ru/B41OSB

I would like to know if someone can reproduce this too - take shaky video, crop black borders, resize back to 720x576 and
see the result.