file size problems with xvid

rorypyro · 18th July 2005, 20:53

Using Gordian Knot, trying to encode 45 minute video from VOB to a 350mb file size, but no matter WHAT I DO, it comes out 416mb.

I've tried reinstalling the codecs, trying a newer version of virtualdub, resetting the default settings for the xvid codecs, checking and unchecking the 'recalculate bitrate if necessary' box, setting the bitrate as low as 800 even though the calc says it should be 950, using frame overhead, not using frame overhead, calculating the audio by bitrate and by file-size, re-processing the file with dvd2avi, renaming the files, deleting all the temp files, and finally banging my head off the screen repeatedly.

will someone please please please give me some advice on this?

I'm dying a little everytime it churns out yet another 416mb file.

jggimi · 18th July 2005, 21:01

Hello, and welcome to the forum.

Post one (or more) of your applicable GKnot log files. We might be able to see what's happening from the logs.

This is such a common request, we have a smiley for it:

rorypyro · 18th July 2005, 21:03

Quote:

Originally Posted by jggimi

Hello, and welcome to the forum.

Post one (or more) of your applicable GKnot log files. We might be able to see what's happening from the logs.

This is such a common request, we have a smiley for it:

sure, will have to wait till tomorrow though, have to get it from home.

rorypyro · 19th July 2005, 14:51

right. here's the log files.

nXus · 22nd July 2005, 08:40

Was there a solution to this problem i'm also having the same problem. out of 9 episodes from a dvd, 6 of them were fine. 3 of them came out bigger. Even when i unticked the re-adjust bitrate if required option.. 1 was 370mb, another was 400mb, and last was 500mb. In all of them the video bitrates had gone up from about 1036 to eg. 1500approx

CWR03 · 22nd July 2005, 08:58

You should expect the file to be bigger if you uncheck the re-adjust bitrate, as it needs to calculate the file by taking your setting and subtracting the audio file size.

It's a good idea to uninstall/reinstall your video codec (XviD/DivX) as installing a newer version over an old one can cause sizing problems.

nXus · 22nd July 2005, 09:02

I tried it ticked and unticked. i normally have it ticked and never had any prob. also haven't changed codecs or reinstalled anything for ages, like months. Also it was only 3 out of 9 that had a problem..

it's the first time i've ever had this problem and i encode a lot. the log shows that the video target size is about 314mb and then somehow it increases the bitrate by itself.. although nothing shows this, that is easy to read, could be there but in hex or something i can't understand

nXus · 22nd July 2005, 11:40

Was using Xvid 1.1, tried divx 5.2 and worked fine. so must be some setting/bug with xvid that only happens in certain situations.

rorypyro · 22nd July 2005, 16:04

Quote:

Originally Posted by nXus

Was using Xvid 1.1, tried divx 5.2 and worked fine. so must be some setting/bug with xvid that only happens in certain situations.

thats what I figure. I had to switch to divx 5 too. worked fine, but now half are xvid and half are divx. It doesn't make much difference, but I prefer the quality of xvid over divx, its a pity it won't work properly!

jggimi · 25th July 2005, 15:22

What I see with both logs is a lack of compressibility testing. Best practice is to use compressibility testing for both quality control and file size management:

http://forum.doom9.org/showthread.php?t=24584

jon.schaffer · 25th July 2005, 15:45

Hi,

it's a XviD-related issue. Here are some explanations:
http://forum.doom9.org/showthread.php?t=92046

18th July 2005, 20:53	#1 \| Link
rorypyro Registered User Join Date: Apr 2005 Posts: 16	file size problems with xvid Using Gordian Knot, trying to encode 45 minute video from VOB to a 350mb file size, but no matter WHAT I DO, it comes out 416mb. I've tried reinstalling the codecs, trying a newer version of virtualdub, resetting the default settings for the xvid codecs, checking and unchecking the 'recalculate bitrate if necessary' box, setting the bitrate as low as 800 even though the calc says it should be 950, using frame overhead, not using frame overhead, calculating the audio by bitrate and by file-size, re-processing the file with dvd2avi, renaming the files, deleting all the temp files, and finally banging my head off the screen repeatedly. will someone please please please give me some advice on this? I'm dying a little everytime it churns out yet another 416mb file.

25th July 2005, 15:45	#11 \| Link
jon.schaffer Eternally Junior Member Join Date: Apr 2004 Location: France Posts: 230	Hi, it's a XviD-related issue. Here are some explanations: http://forum.doom9.org/showthread.php?t=92046 __________________ "Methinks it is like a weasel" (Hamlet in Hamlet, by Shakespeare)

18th July 2005, 21:01	#2 \| Link
jggimi Moderator Emeritus Join Date: Dec 2001 Location: The NW corner of Lake Erie Posts: 5,552	Hello, and welcome to the forum. Post one (or more) of your applicable GKnot log files. We might be able to see what's happening from the logs. This is such a common request, we have a smiley for it:

22nd July 2005, 08:40	#5 \| Link
nXus Registered User Join Date: Nov 2003 Posts: 4	Was there a solution to this problem i'm also having the same problem. out of 9 episodes from a dvd, 6 of them were fine. 3 of them came out bigger. Even when i unticked the re-adjust bitrate if required option.. 1 was 370mb, another was 400mb, and last was 500mb. In all of them the video bitrates had gone up from about 1036 to eg. 1500approx

22nd July 2005, 08:58	#6 \| Link
CWR03 Custom User Title Join Date: Mar 2005 Posts: 3,733	You should expect the file to be bigger if you uncheck the re-adjust bitrate, as it needs to calculate the file by taking your setting and subtracting the audio file size. It's a good idea to uninstall/reinstall your video codec (XviD/DivX) as installing a newer version over an old one can cause sizing problems.

22nd July 2005, 09:02	#7 \| Link
nXus Registered User Join Date: Nov 2003 Posts: 4	I tried it ticked and unticked. i normally have it ticked and never had any prob. also haven't changed codecs or reinstalled anything for ages, like months. Also it was only 3 out of 9 that had a problem.. it's the first time i've ever had this problem and i encode a lot. the log shows that the video target size is about 314mb and then somehow it increases the bitrate by itself.. although nothing shows this, that is easy to read, could be there but in hex or something i can't understand

22nd July 2005, 11:40	#8 \| Link
nXus Registered User Join Date: Nov 2003 Posts: 4	Was using Xvid 1.1, tried divx 5.2 and worked fine. so must be some setting/bug with xvid that only happens in certain situations.

25th July 2005, 15:22	#10 \| Link
jggimi Moderator Emeritus Join Date: Dec 2001 Location: The NW corner of Lake Erie Posts: 5,552	What I see with both logs is a lack of compressibility testing. Best practice is to use compressibility testing for both quality control and file size management: http://forum.doom9.org/showthread.php?t=24584