decent bitrate calculator for DivX 5 Pro

[Michael123]

Heya,

I'm looking for a decent bitrate calculator that works fine with DivX 5.02 Pro. I know that those values computed can't be too precise, but the calculators I've tried so far usually differ by over 100 MBytes from the designated bitrate value and that doesn't seem to be within the limits.

Especially, I need a calc that supports file-size input in MBytes/KBytes (not just in number of CDs).

Thanks,
Michael

[khp]

The most precise calculator there is, is GordianKnot. But if you file is undersize by 100MB the problem is most likely, that you have reached the maximum possible quality, with your current settings.

[mnd]

You may calculate the bit rate needed for a given Divx 5.02 Pro file size with the freeware Divx4Bitrate Calculator. You may download it at : http://spark.hit.bg/divxcalc. I get good results enough with Divx 5.02 Pro 2 pass encoding with Quarter pixel, global motion compensation and bidirectional encoding selection. It seems to me that quarter pixel increase slightly the length of the file whereas the to other parameters reduce slightly the length file.

As you wish for, one option allows to point out your desired file size in MB.

[Michael123]

Originally posted by mnd
You may calculate the bit rate needed for a given Divx 5.02 Pro file size with the freeware Divx4Bitrate Calculator. You may download it at : http://spark.hit.bg/divxcalc.

Actually, I tried getting that calc but as it seems the URL's been down for quite a while.

Any alternative address?

[Michael123]

Originally posted by khp
The most precise calculator there is, is GordianKnot.

I already took a look at GordianKnot, it's mostly satisfying but cannot handle file sizes in Kilo- or Megabytes. It's been designed for 'number of CDs' only as far as I can see.

Originally posted by khp
But if you file is undersize by 100MB the problem is most likely, that you have reached the maximum possible quality, with your current settings.

I'll take that into consideration while I keep playing around with the file...

[mnd]

Try here : http://bourgas.bse.bg/DivX4Bitrate.zip

[mnd]

I retry a new site for Divx4 bitrate calculator thanks to Copernic Basic.To find address on the internet you may use this freeware. You can dowload it at http://www.copernic.com/products/copernic/index.html.

[Michael123]

Thanks!

[UncasMS]

@micheal123

I already took a look at GordianKnot, it's mostly satisfying but cannot handle file sizes in Kilo- or Megabytes. It's been designed for 'number of CDs' only as far as I can see.

in the bitrate tab select: "calculate avi file size"
then change the "average bitrate" manually until you reach your desired *total file size*

wouldnt that help?

[Michael123]

Originally posted by UncasMS

in the bitrate tab select: "calculate avi file size"
then change the "average bitrate" manually until you reach your desired *total file size*

wouldnt that help?

I managed to determine the file size that way too, but it's not quite as comfortable as I wish it to be.

Anyway, I can live with that.

[khp]

You can just edit the 'total file size' box directly, it won't flip back to cd sizes untill you hit one of the cd buttons.

[Michael123]

Originally posted by khp
You can just edit the 'total file size' box directly, it won't flip back to cd sizes untill you hit one of the cd buttons.

You surely noticed that the box doesn't allow deleting old and inserting a new value easily, you may only add digits to the left side. Kinda awkward for an input box.

[khp]

Originally posted by Michael123

You surely noticed that the box doesn't allow deleting old and inserting a new value easily, you may only add digits to the left side. Kinda awkward for an input box.

The box is subject to cirtain constraints. you are not allowed a size that would result in a negative video bitrate

If you turn of audio and interleaveing overhead calculation, you can freely enter anything you want, except 0. Just remember to turn on audio and interleaving calculation afterwards.

[Michael123]

Originally posted by khp

If you turn of audio and interleaveing overhead calculation, you can freely enter anything you want, except 0. Just remember to turn on audio and interleaving calculation afterwards.

Thanks for the hint, but out of curiosity: why does it actually "work" when audio/interleaving overhead calculation is turned off? Is this a bug?

[khp]

Originally posted by Michael123

Thanks for the hint, but out of curiosity: why does it actually "work" when audio/interleaving overhead calculation is turned off? Is this a bug?

No not a bug. As I said, video bitrate must not be negative, if you got a 2 hour movie with 128 kbps audio, and a filesize of only 10 MB, the video bitrate would have to be negative. With no audio you got a positive video bitrate.