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afterdawn.com > forums > archived forums > divx / xvid > how to tell cbr vs vbr
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How To Tell CBR vs VBR
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seagrave
Member
_ 		5. April 2010 @ 22:07 _ Link to this message    Send private message to this user   
I get some MPEG4 downloads that given their size probably should not show macroblocks. I've wondered if there's a way to tell whether the encoder used single pass CBR or multi-pass VBR. I might be missing something, but I can't find anything in GSpot that that says whether a video is CBR or VBR.

How can I tell? If not GSpot what?

Thanks!!
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seagrave
Member
_ 		5. April 2010 @ 22:35 _ Link to this message    Send private message to this user   
Just tried MediaInfo... and I still can't see anything that displays this info.
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cyprusrom
AfterDawn Addict

1 product review
_ 		6. April 2010 @ 10:32 _ Link to this message    Send private message to this user   
Originally posted by seagrave:
 Just tried MediaInfo... and I still can't see anything that displays this info.
Switch to "Text View" in MediaInfo, you will get more information:
.


.
Some files are not listed with "Variable Bitrate", but instead with a "Bitrate" and "Nominal Bitrate", which indicates VBR.
.


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seagrave
Member
_ 		6. April 2010 @ 12:21 _ Link to this message    Send private message to this user   
Thanks AGAIN cyprusrom!!

So if there's just one listing, say

Bit rate : 1368 Kbps

We know it's a single pass?

Can "nominal" also indicate ABR (Average Bitrate)? I assume that would still take more than one pass.
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