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afterdawn.com > forums > archived forums > divx / xvid > wmv to xvid bitrates?
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WMV to Xvid bitrates?
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dratner
Newbie
_ 		31. May 2006 @ 10:30 _ Link to this message    Send private message to this user   
I am having trouble converting WMV files to Xvid. Lets say WMV file properties say that its encoded at 700 kbps, 24 bits for video. When I set my software to re-encode using Xvid I need to triple even quadruple my Xvid bit rates just to get a picture that matches the original WMV quality. Does that even sound right?

Is there a good rule of thumb about WMV to Xvid bitrates or a calculator that scans the file and tells me what I should be encoding at?
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celtic_d
AfterDawn Addict
_ 		31. May 2006 @ 18:35 _ Link to this message    Send private message to this user   
To compare properly, you would need the source that the wmv was encoded from. Re-encoding lossy to lossy is always going to cost more bitrate. Sounds like you should probably be encoding at a fixed quant. That way you can forget about setting bitrates. XviD will use what is required.
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dratner
Newbie
_ 		5. June 2006 @ 06:00 _ Link to this message    Send private message to this user   
Unfortunately the original is not available as the majority of the files are just stuff that I have culled off the net over a few years. Fixed quantification...hmm.

The program that I am using to convert these files Mediacoder only has the following options: fixed quality, fixed bitrate, 2pass, and 3pass. It also has a little pulldown box labeled bitrate control: by analysis, by desired stream size, and by compression ratio.

Your thoughts?
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celtic_d
AfterDawn Addict
_ 		5. June 2006 @ 07:43 _ Link to this message    Send private message to this user   
For fixed quality it would be using fixed_quant=# I guess. 3 pass though? pass in xvidencopts only accepts 1/2 so it sounds like you have libavcodec MPEG-4 selected instead of XviD. Not used mediacoder myself though so I could be wrong. It uses mencoder for encoding right?
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BlinkN
Member
_ 		5. June 2006 @ 07:56 _ Link to this message    Send private message to this user   
MediaCoder uses mencoder.
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Download XviD codec from here.
 
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