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View Full Version : Erratic filesizes in XviD

Hariken
30th June 2005, 13:35
Okay, so each week I was encoding a show to 175MB using AVISynth>VirtualDub and compressing in XviD. One day it was absolutely fine, and the next day - without changing any settings - it started churning out inconsistent and erratic filesizes. For instance, an episode of a show with a length of 20:43 would give a filesize of 223MB, still using 178200 and my regular audio settings to get to 175MB (which worked the previous day). After a bit of messing around to try and fixing it but to no avail, I upgraded my XviD to the latest version. The same file then turned out files of 198MB instead of 223MB. Keep in mind this is even if I encode the file twice - the sizes would still be 223MB and 198MB respectively. For a few weeks I suffered with encoding the file about 8 times until I managed to find the number that got me 175MB, but this was becoming a serious issue and I didn't want to damage my laptop. I've tried soft-formatting and system restore, but the problem sticks. I have emailed tech support to try and find out how to hard format on a laptop with no floppy drive or obvious way to get to a command prompt, but haven't had a reply yet (it has been a week).

I am wondering if anybody knows what the problem is, and if possible, can you suggest how to fix it?

What puzzles me is how I didn't change any settings from one day to the next, but the problem arose. :( As a result, I'm not seriously behind in encoding. :/

Thanks to ANYONE that can help... you'll be a life saver.
ChronoCross
30th June 2005, 13:47
is the 178200 your target filesize that you put in the second pass of xvid? if so then that perfectly fits what your getting in terms of filesize as 178200 + 128kbps mp3 == roughly 197-198. Your target filesize in xvid should be around 152000 if I remember correctly(thinking rather roughly about it).
Sharktooth
30th June 2005, 13:48
http://forum.doom9.org/showthread.php?t=92046
it's even a sticky...
Hariken
30th June 2005, 13:50
is the 178200 your target filesize that you put in the second pass of xvid? if so then that perfectly fits what your getting in terms of filesize as 178200 + 128kbps mp3 == roughly 197-198. Your target filesize in xvid should be around 152000 if I remember correctly(thinking rather roughly about it).

Sorry, 178200 is the value I put into the XviD's built-in calculator.

EDIT: And it worked perfectly fine before the problem arose.