21_already
13th March 2004, 23:56
Hey, i joined this forum basically to report what i think is an unreported bug in Xvid. I hope it's in time 'cause i had to wait 5 days for membership to clear.
I'm using Koepi's build of release copy 3 version 29022004, but i found the same problem in release copy 2 pretty much a day before RC3 came out.
Here goes:
I think it may be some kinda MS bug but when i code first pass files things mess up.
Here's the problem specifically.
I'm trying to do a two pass encode, but i did the first pass on its own with the intention of doing a second when i had time
I'm using AS level 5 with GMC, adaptive quantization, Qpel, 2 bframes with closed GOV and packed bitstream
On programs that try to create AVI files even though i tell Xvid to Discard the first pass (full quality first pass unchecked) an AVI file containing basically nothing is created anyway.
Trying to open this file of course ends up in the player crashing type stuff.
More importantly on Windows XP (SP1) Explorer crashes pretty horribly when it tries to render an image for thumbnail previews, and even for the thumbnail on the folder containing the file itself.
This means whenever i even OBSERVE the folder containing one of these files in thumbnail view i get a crash with error report saying a bunch of stuff (too much error report stuff to reprint)
I tried it with two different encoders (Rad Video Tools Bink & Smacker and DVDx 2.2) and with two different Sources (a high def. quicktime file and a DVD) and get the same problem. The 2nd pass files made from these work fine
I decided to find what function it was that could be causing it so i tried again using level 0 simple profile and the problem disappeared.
I went back to Advanced simple profile and knocked out features one by one to see which was the culprit:
it was B-VOPs swithced on (regardless of amount, packed bitstream or closed GOV)
Hmm, anything else i need to include? uh, using a laptop, 1.4GHz Pentium M??? i don't think the rest is important.
As i said, i know it's a micro$oft problem, but i've made similarly empty Divx AVI files the same way with no problem, Windows simply renders a black screen as a preview.
It's not really a problem that affects quality, coding or playback, but it's annoying nonetheless and not something you'd expect (partly because explorer doesn't crash for about 20-30 seconds after the error message appears).
I gotta say, if it is due to Xvid itself then i think it's a pretty important problem to fix, i can see a lot of new users getting into Xvid and being put off by something like this.
On another note, gotta compliment you guys on the quality. Thanks.
Edit:
i just did a search and found someone named soujir0u made almost the same report in April 2003 on Xvid 05042003-1 but he didn't get a reply (but did get 231 views)
I hope i'm not reporting something already reported, but like i said, it was there in RC2 and still there in RC3
I'm using Koepi's build of release copy 3 version 29022004, but i found the same problem in release copy 2 pretty much a day before RC3 came out.
Here goes:
I think it may be some kinda MS bug but when i code first pass files things mess up.
Here's the problem specifically.
I'm trying to do a two pass encode, but i did the first pass on its own with the intention of doing a second when i had time
I'm using AS level 5 with GMC, adaptive quantization, Qpel, 2 bframes with closed GOV and packed bitstream
On programs that try to create AVI files even though i tell Xvid to Discard the first pass (full quality first pass unchecked) an AVI file containing basically nothing is created anyway.
Trying to open this file of course ends up in the player crashing type stuff.
More importantly on Windows XP (SP1) Explorer crashes pretty horribly when it tries to render an image for thumbnail previews, and even for the thumbnail on the folder containing the file itself.
This means whenever i even OBSERVE the folder containing one of these files in thumbnail view i get a crash with error report saying a bunch of stuff (too much error report stuff to reprint)
I tried it with two different encoders (Rad Video Tools Bink & Smacker and DVDx 2.2) and with two different Sources (a high def. quicktime file and a DVD) and get the same problem. The 2nd pass files made from these work fine
I decided to find what function it was that could be causing it so i tried again using level 0 simple profile and the problem disappeared.
I went back to Advanced simple profile and knocked out features one by one to see which was the culprit:
it was B-VOPs swithced on (regardless of amount, packed bitstream or closed GOV)
Hmm, anything else i need to include? uh, using a laptop, 1.4GHz Pentium M??? i don't think the rest is important.
As i said, i know it's a micro$oft problem, but i've made similarly empty Divx AVI files the same way with no problem, Windows simply renders a black screen as a preview.
It's not really a problem that affects quality, coding or playback, but it's annoying nonetheless and not something you'd expect (partly because explorer doesn't crash for about 20-30 seconds after the error message appears).
I gotta say, if it is due to Xvid itself then i think it's a pretty important problem to fix, i can see a lot of new users getting into Xvid and being put off by something like this.
On another note, gotta compliment you guys on the quality. Thanks.
Edit:
i just did a search and found someone named soujir0u made almost the same report in April 2003 on Xvid 05042003-1 but he didn't get a reply (but did get 231 views)
I hope i'm not reporting something already reported, but like i said, it was there in RC2 and still there in RC3