Quantcast Bitrates: Calcumatic 1.0.6 with MPEG2 - digitalFAQ.com Forums [Archives]
  #1  
10-16-2003, 08:11 AM
nicksteel nicksteel is offline
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I have a DVD rip that I'm encoding with KVCDx3-Mpeg2 reset to 704x480. I cannot play MPEG1 on my players, but 704x480 Mpeg2 seems pretty compatible with DVD players.

Video: 138 min 17 sec
2 CD's 80 Min.
Audio Bitrate 192 (actually using 128, but using for overall size safety)

Results:

1387.8 Average Bitrate
791 0.57 * Average

Min Bitrate in TMPGEnc set to 791

CalcMatic predicts CQ 75

Results:

813,732
813,686
57,084

This is with muxing 128 mp2 instead of 192 mp2 used in prediction.

I realize that most users do Mpeg1, but is there anything I can do to better use CalcMatic with Mpeg2? Using the results, I have reduced the average bitrate by 3.4% to 1340 to try again.
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  #2  
10-30-2003, 06:49 AM
mistermickster mistermickster is offline
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Quote:
Originally Posted by nicksteel
CalcMatic predicts CQ 75
Are you confusing CalcuMatic with CQMatic CalcuMatic does not predict CQ
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  #3  
10-30-2003, 07:05 AM
nicksteel nicksteel is offline
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Quote:
Originally Posted by mistermickster
Quote:
Originally Posted by nicksteel
CalcMatic predicts CQ 75
Are you confusing CalcuMatic with CQMatic CalcuMatic does not predict CQ
CalcMatic predicts CQ 75
should read
CQMatic predicts CQ 75

Anyway, finally am using 775 as custom size for MPEG2 800MB cds. Overhead for MPEG2 does not work well with CalcuMatic calculations using defaults for 800MB.
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  #4  
10-30-2003, 08:25 AM
Dialhot Dialhot is offline
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I always use min=64, max =2300, custom size 807 MB (only on CD, not two like you) and CQMatic always bive mive file from 803 to 813 MB.

Perhaps the problem comes when you have too much space avalaible (2 CD insteed of one).
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  #5  
10-30-2003, 08:39 AM
jorel jorel is offline
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Quote:
Originally Posted by Dialhot
I always use min=64, max =2300, custom size 807 MB (only on CD, not two like you) and CQMatic always bive mive file from 803 to 813 MB.

Perhaps the problem comes when you have too much space avalaible (2 CD insteed of one).
for me is perfect too using
min300
max2500
mpeg2 - 1 cdr 700mb
final size ~803mb!
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  #6  
10-30-2003, 09:37 AM
kwag kwag is offline
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Hi nicksteel,

With such a high average bitrate (~1,300Kbps), you don't need the (0.57 * MIN).
Set your MIN to 300Kbps.

-kwag
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