Quantcast KVCD Minimum Bitrates? - digitalFAQ.com Forums [Archives]
  #1  
04-11-2004, 10:04 AM
fingerbob fingerbob is offline
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Hey folks.

Just a quick question. Is there any other way apart from "trial and error" of determining the minimum bitrate that a particular stand-alone will play

I ask generally so I can safely encode backups of some 3 hour movies I own without wasting CDRs.

Thanks.
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  #2  
04-11-2004, 10:07 AM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by fingerbob
Hey folks.

Just a quick question. Is there any other way apart from "trial and error" of determining the minimum bitrate that a particular stand-alone will play

I ask generally so I can safely encode backups of some 3 hour movies I own without wasting CDRs.

Thanks.
You can burn a cdrw test with many short samples encoded with different minimun bitrate.
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  #3  
04-11-2004, 10:48 AM
fingerbob fingerbob is offline
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um...isn't that 'trial and error'?
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  #4  
04-11-2004, 10:55 AM
jorel jorel is offline
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Quote:
Originally Posted by fingerbob
um...isn't that 'trial and error'?
it's not a bitrate or kvcd problem.
each label/model of standalones suport more or less min bitrate, ok?
one of my players suport min=50, the other min=150 !

do samples ~1 minutes each using differents values for min bitrate,
burn in cd-rw and test your standalone

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  #5  
04-11-2004, 11:58 AM
Jellygoose Jellygoose is offline
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Quote:
Originally Posted by fingerbob
um...isn't that 'trial and error'?
actually it is not trial and error... if you encode a sample with a min. bitrate of let's say 0-100 and it works, you're on the safe side...
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  #6  
04-11-2004, 01:03 PM
rds_correia rds_correia is offline
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Yeah J3ll,
But, that sample needs to be made of a super low motion clip, like the begining of the movie
which is usually very dark and almost NO motion
If it plays fine then your ready to rock
Cheers
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  #7  
04-11-2004, 01:45 PM
Prodater64 Prodater64 is offline
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Quote:
Originally Posted by fingerbob
um...isn't that 'trial and error'?
Are multiples in one.
With cdrw you won't waste any cd.
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  #8  
04-12-2004, 08:46 AM
Encoder Master Encoder Master is offline
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Make some test movies with CBR at 300 and less till your player made problems. So you know it very exactly.
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  #9  
04-12-2004, 10:36 AM
fingerbob fingerbob is offline
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OK I think I'll try starting at min bitrate 300 and work down.

Just out of curiosity, will it make any difference to detecting the min rate if I use differing max rates? I mean using min = 200 and max = 900 will undoubtedly give worse results than min = 200 max = 1500. If the max has more scope to play with, then it will (I assume) create less instances whereby it needs to use the lowest bitrate.

Hmmm, maybe this isn't as simple as I at first thought. I guess I gotta find the lowest combination of min/max rather than the lowest min.
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  #10  
04-12-2004, 10:49 AM
jorel jorel is offline
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Quote:
Originally Posted by fingerbob
Hmmm, maybe this isn't as simple as I at first thought. I guess I gotta find the lowest combination of min/max rather than the lowest min.
yes, that's cool!
this is the "idea" !

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  #11  
04-15-2004, 08:44 AM
Peder Peder is offline
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Woldn't it be wiser to use max=min? That way it shouldn't matter what clip you try.
BTW, Pioneer DV-444 seems to dislike bitrates lower than ~700-800.
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04-15-2004, 12:23 PM
kev23m kev23m is offline
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I got Pioneer Dv 366 and it plays with Min Bitrate 0 without any problem.
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  #13  
04-15-2004, 11:13 PM
Roc Roc is offline
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Quote:
Woldn't it be wiser to use max=min?
For Test this methot may be ok, but not for encoding because youll get CBR doing it that way.
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  #14  
08-24-2005, 08:28 PM
Butters2005 Butters2005 is offline
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with CBR at 300 i do mine at 900
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  #15  
08-24-2005, 10:03 PM
kwag kwag is offline
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Hi Butters2005,

If your standalone player can use a lower MIN bitrate, you will have more bit distribution available on high action scenes.
If you fix the bitrate floor at 900Kbps, you waste bits on scenes that don't need that bitrate, such as low lit and low action scenes.

-kwag
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