CalcuMatic
CalcuMatic 1.0 is released :!:
http://www.kvcd.net/forum/viewtopic.php?t=5145 It's a standalone program, so you can use it independently of CQMatic ;) If you want to launch CalcuMatic from CQMatic, make sure you put the .exe in the same directory where you have CQMatic installed. You must use CQMatic version 1.2.00 for this to work :!: Then press the calculator button on CQMatic, and CalcuMatic will launch. -kwag |
Hi Kwag,
Thanks for this tool. How much space does it take into account for VCD overhead and such? I like to add a simple menu to the beginning of my VCDs that takes about 1 or 2MB when built in VCDEasy, so i'm trying to figure how to calculate this with your tool. Thanks :D |
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Don't worry about it. I left a very small "insurance" margin ;) Compare it to Moviestacker, and you'll see about -5Kbps "safety" difference, which would add to ~4MB on a two hour movie :) -kwag |
Hey Kwag,
Thank You! I have one question. For a 4.7Gb DVD what are you actually using as the true (aka 1024k vs. 1000k) size. Most of the time I am placing 3 or 4 movies / DVD. So my custom size is dependent on the total. Right now I use 1,120 MB / movie to place 4 videos on a DVD and 1,490 MB / movie for a 3 movie DVD. Does this sound about right or am I wasting or over judging the space? Thanks Racer99 |
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I'm using max size media of 4.3GB as 4,403.2KB for DVD ;) Edit: So use 1100.8 for each movie, if you want to put four on the media. -kwag |
Hi Kwag,
I just finished my first encode with the calcuMatic bitrate calculations and the encode came out about 30,000kb smaller then CalcuMatics wanted file size for a 2CD encode -2%. That is fine except the final muxed file was exactly 795MB for 2 CDs. So if CalcuMatic would of hit its target the encode would have been to big right? 795 per CD is the max I can use and not go over 800MB after authoring with VCDEasy. Or do you come up short of the target on purpost :?: Thanks! |
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That's not CalcuMatic's fault. That's prediction fault. What is the average bitrate wanted, if you look at Bearson's bitrate calculator :cool: :?: Compare it to CalcuMatic. Quote:
BTW, 800MB is 819,200KB You can easily burn that, without any overburn :!: Actually, you can go close to 810MB, which is about 829,440KB without overburning :D -kwag |
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I have noticed you can go up to 805 or higher without overburn. I though 800 was the max |
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-kwag |
A tad confused.
I have only used CalcuMatic for DVD muxes so far. To use, I subtract the mp2 file size from the desired final size. enter into custom size and it hits 98 to 99%. Great.
For example. For a 115 minute film with 128 mp2 of 108MB, I entered a custom size of 1322 (1430 - 108) to compute a abr of 1441. This produced a final dvd muxed size within 98.6% of 1430. Great! I also tested a capture of Futurama with a final target of 230MB and ended up 228 (99%) this way. Again, great! If I do a KVCD, I see that one can choose a CD size and proceed. Is it correct that you only have to subtract mp2 size from desired size for DVD? |
Re: A tad confused.
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When you select the audio bitrate, it automatically subtracts the size from the video :!: -kwag |
Re: A tad confused.
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If I enter 1322 in custom and 115 in minutes, I get a abr of 1441. This equates to a video size of 1243328 and an audio size of 110400 or a total of 1353728. In reality, the final encoded m2v size was about 1219000 that ended up some 2% less than the NEEDED size. 1242862 = ( 1441 / 8) * 60 * 115 1242862 will mux to approx 1300MB m2v as bbmpeg DVD 108000 will mux to approx 110MB m2p as bbmpeg DVD --------- Predicted = 1410Mb Total Actual muxed output (mpg) from bbmpeg (DVD) was within 2% of maximum 1430 total size (2 700MB CD's). I stopped the first encode when the m2v file at 50% of tmpgenc process significantly exceeded one-half the size wanted. The final encode ran some 20 hours at 720x480 KDVD on my 2.53MHZ P4. If I increase the bitrate by some 10% to 1586, the final muxed size will be well in excess of 1430000. I also subtracted the audio size and successfully encoded a capture of Futurama with final size of 228MB against target of 230MB, or 99%. I'll run some more tests without subtracting the mp2 size, but assure you that the final bbmpeg muxed (DVD) mpg will exceed the target. I think this results in the different "overhead" involved with DVD than with VCD or SVCD. Hey, I'm "Happy as a clam" with everything. Your programs are doing about everything for me and resulting in 98 - 99% full disks. Just about hands free encoding! Beautiful!!!!!! I should probably add that I mux KDVD in bbmpeg as DVD and select the muxed file in TMPGEnc Author as input. It loads both video and audio from the mpg. I then chapter and produce an image file that is burned in NERO. There is space to chapter on disks outputted as 700MB from bbmpeg. The final disks are 715600+ from bbmpeg. I have found after many encodes that bbmpeg (DVD) mux to mpg has an overhead of about 4.69% for m2v, and about 1.56% for mp2. This seems to be very consistant. In fact, by using these percentages with no margin of error allowance, all my encodes to date (using the manual formula you kindly furnished) have involved loss of only part of the credits at the end of the film, if any loss at all. I'll run encodes tonight and give exact figures, both with subtracting the audio and not, along with the exact file sizes produced at each step. Keep up the good work, it is really appreciated. |
Hi nicksteel,
Are you taking into consideration that the "custom size" is in MB and not in KB :?: So 1,430MB is actually 1,464.32KB :!: -kwag |
Kwag, a little more of your patience, please.
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Last encode was a DVD 154min40sec. 128bps mpg 145MB mpg DVD2AVI to TMPGEnc KDVDfull. Optimum non-MA script. 4:3 Final product: 2 miniDVD's With my calculations: 1430 - ( 145,000 * 1.0156 ) = 1,283,000 video size 1283 = ( 1004 / 8 ) * 155 * 60 1283 in CalcuMatic = 1004.6 abr I increased abr (shouldn't have) by 1% and used abr of 1014 Output was: m2v from TMPGEnc: 1,220,531 muxed in bbmpeg as DVD m2v from bbmpeg: 1,288,786 mp2 from bbmpeg: 147,234 --------- 1,436,020 This resulted in 3 mpg files saved as 700MB from bbmpeg: 715,584 715,702 4,734 My point is this: If I enter 1400 into CalcuMatic as custom size, the abr is 1107.9. If 1014 is a tad too big, 1108 would be even bigger. I am confused, but I'm sure you'll set me on the right path. |
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