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| AlienJudge |
| Posted: Jul 24 2012, 02:17 AM |
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Newbie
Group: Members
Posts: 1
Member No.: 35210
Joined: 24-July 12
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Hi. Just downloaded this program to convert a bunch of images into a movie but im having a problem. I can make the movie no problem, but it looks blurry? not just in the final avi (no compression either), the source images look blurry in Vdub as soon as i import them. I should point out that the source images are low resolution pixel art. Vdub wouldnt take them as bmps so i turned them into pngs. i want them to stay jaggy and crisp in the final avi, like they look in graphics gale/paint/imageready!
is it even possible to get round this? ive noticed before that opening pixel art in certain programs like windows picture viewer applies this softening/blurring effect and often wondered why. i thought in the past with WPV perhaps it was a bit of mild AA or something. I should add ive checked and there are no filters turned on at all in Vdub.
If anyone could help, or even if theres nothing to be done shed some light on this for me id be very grateful! this animation is to be the centrepiece in the attempt to get into college 
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| Abrazo |
| Posted: Jul 26 2012, 07:12 PM |
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Advanced Member
Group: Members
Posts: 775
Member No.: 28995
Joined: 5-November 10
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Can you open and verify your PNG-images with another program ?
Maybe they are already blurred at the beginning, due to the conversion from BMP ?
What you can do is try to convert the BMP's to JPG's, taking care to keep at least the same resolution and color depth as the original ones.
Than open these JPG's in VirtualDub.
In VirtualDub you can also try if it gives a difference when you change the Video > Color Depth > Decompression format to one of the other available choices.
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| phaeron |
| Posted: Jul 28 2012, 06:18 PM |
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Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
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With color transitions, this is likely due to chroma subsampling. Essentially, the color (chroma) information is stored at half the resolution of the brightness (luma) information. JPEGs are nearly always emitted with 2:1 chroma subsampling, and most modern video compression formats use it as well. There are video compression algorithms suited to line art, but JPEG/MPEG/H.264/WMV aren't among those. With enough tweaking you might be able to get an acceptable result, but you'll almost certainly have to jack the bitrate up very high which will result in a large file.
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