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Need to normalize an AVI file
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janlafata
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16. October 2009 @ 03:40 _ Link to this message    Send private message to this user   
I say normalize because that's the only way I can explain it. Upon playback, but just in some parts, this file gets a little fuzzy and looks like it's distorting at times.. I had this problem on an AVI file a long time ago, but I ran it through VirtualDub and it cleaned it up. Unfortunately I can't remember what settings I used. Might AVIdemux also work, or do you have any other suggestions?
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16. October 2009 @ 17:12 _ Link to this message    Send private message to this user   
I think the tool you use is secondary to actually knowing what it is
you want to do. Are you talking about brightness/contrast issues?
Or do you mean something else by "normalize" ?

In Virtualdub you can use the filter in blend mode,
and then with the curve editor, have it apply only to certain
segments that need it.
janlafata
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16. October 2009 @ 19:27 _ Link to this message    Send private message to this user   
Sorry I guess I did not make things clear. Basically the file plays just fine from stop to start in WMP, it's only when I use the slider on WMP to jump ahead to check the quality of the whole file, that it distorts. It's like the rest of the video has not caught up with what was there before or something. After a few seconds though or when the scene changes everything gets back to normal.

Here's an Image Shack screenshot of it. Alo below is the file stats from MediaInfo:

http://img73.imageshack.us/img73/3121/ourtowndistorted.jpg

General
Complete name : E:\Video\Unedited Video\Our Town.avi
Format : AVI
Format/Info : Audio Video Interleave
File size : 697 MiB
Duration : 1h 29mn
Overall bit rate : 1 088 Kbps
Writing application : Nandub v1.0rc2
Writing library : Nandub build 1852/release

Video
ID : 0
Format : MPEG-4 Visual
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default (H.263)
Codec ID : XVID
Codec ID/Hint : XviD
Duration : 1h 29mn
Bit rate : 996 Kbps
Width : 512 pixels
Height : 384 pixels
Display aspect ratio : 4:3
Frame rate : 23.976 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.211
Stream size : 638 MiB (92%)

Audio
ID : 1
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 3
Codec ID : 55
Codec ID/Hint : MP3
Duration : 1h 29mn
Bit rate mode : Variable
Bit rate : 79.7 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Resolution : 16 bits
Stream size : 51.1 MiB (7%)
Alignment : Aligned on interleaves
Interleave, duration : 24 ms (0.58 video frame)
Interleave, preload duration : 462 ms
Writing library : LAME3.89 (beta)
Senior Member
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16. October 2009 @ 20:06 _ Link to this message    Send private message to this user   
Open the file in Virtualdub and locate one of the problem area's.
Step forward frame by frame and see if you can recreate the problem.

A second thing to try, set audio and video to "direct stream copy"
then File/save as avi (to save to a new avi)
and see if the new one does the same thing.

If it still has a problem, use virtualdub to reencode it.
Set audio to "direct stream copy" and video to "fast recompress"
Set video/compression and select xvid. Hit configure/load defaults.
OK out, File/Save as avi
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janlafata
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17. October 2009 @ 03:58 _ Link to this message    Send private message to this user   
Well I always like to keep my threads updated, especially if I found a solution. I re-size all of my AVI's before I burn them to DVD anyway, so I thought, even with this little glitch I need to see what will happen when I re-size this file.

So I just used the drop-down in Video and selected MPEG 4 Xvid, picked a size and started. When I was finished, there was no trace of distortion when I used the slider to check my video.

Don't know the reason it worked but I'm not complaining. Thanks as always for your assistance!
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