hi
what do you use for this? i tried the divx 4 calculator and my divxs always come out bigger than what i want them to.
thanks
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What type of encoding are you using? Single pass VBR perhaps? bitrate calculators won't work with VBR unless you use 2-pass.
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Originally Posted by crahak
firstly, i tried working the bitrate out just with just with my calc
the dvd is 115 mins long, thats 6900 secs
i was going to use mp3 128kbits/s for the audio
so the uadio will take up
6900*128*1000/8 = 110400000 bytes=105 meg
since i want to fit it on 1 700meg cd that means we have
700-105=595megs left for video
595 megs = 4991222 kilobits
note this kilo is 1000 not 1024
so the bitrate should be
4991222/6900=723kbits/sec
i tried this with 1 pass vbr and it came out at about 750meg
tried again with bitrate 650 (guess) and it came out at about 730meg
so at this point i was geting quite anoyed and decided to download a calc prog. the calprog told me to use 703 kbits/sec (which is you'll see is quite close to what i calculated). but seeing as id tried 650 and it still came out big i decided to seek help. hope u dont mind
if the math is so simple why doesn't it work ? -
Because there is an overhead when the audio and video are interleaved.
If you use Gordian Knot, which can act as a front-end for Smartripper, DVD2AVI, you can estimate the final filesize to within a few MB.
Take a look at www.doom9.org
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