Bugs --- or just the way it is?

[turbodood]

I'm just curious about a few things here. First of all there is DirectX smoothing, that other codecs like divx apply, to any resolution of file. While higher resolution files seem to be ok, lower res Xvid files simply do not do it, the remain pixellated and ugly --- at least on WMP. Perhpas there is some 3rd party player I'm unaware of to avert this. Then there is reprocessing xvid encoded files. It frankly seems to give programs fits. virtualdub usually manages to deal with it well enough, but it will crash when I eventually try to close it --- with the every annoying illegel operation box that never goes away no matter how many times it is closed. Then there is Tmpgenc --- which will do stuff like appear to be running ok, then crash 9 hours into an encode with a read or write error, or maybe give a few similar ones before it even starts. BBmpeg/AVI2mpg2 does similar stuff, crashing upon even attempting to open an xvid. Now I am using a somewhat old version now koepi's 0729 I think i it is. I've not seen anything in the history indicating this stuff has been touched, so I haven't bother upgradring. I can also acknowledge I might just have a particularly screwed up directshow filter setup, but I dunno. I mean none of this in any disrespect to the people behind Xvid --- despite these problems, I use it all the time, as I think its great.

[turbodood]

Just an update to my comments. It would seem this may be because well, the decoder functions not as its own decoder codec, but as a directshow filter. Hence Tmpgenc needing the dirctshow filter to be used, and WMP not showing any actual frame rate. Has this been changed in newer versions?

[-h]

I'm not sure.. XviD can be decoded via VfW or DirectShow, and the frame rate should be dependent on the AVI parsing filter, definitely not the video decoder.

I don't know much about DShow however, I think Nic is the man you're after :)

-h

[droolian01]

Hi there turbodood.

While higher resolution files seem to be ok, lower res Xvid files simply do not do it, the remain pixellated and ugly --- at least on WMP

I'm not sure what you mean. If the low res video was heavily/poorly compressed then, yes, you will see macroblocks.. See my sample taken from an encode i did for a buffy newsgroup. It is 73MB for a 41 minute episode and is designed specifically for modem users. It has to be low res to keep filesize down, but i can't see many macroblocks!

This brings me to your second point - this modem friendly buffy eposode was encoded from a 342 MB version (xvid obviously!!) for broadband d/l's. I know this is not strictly the done thing (should have used the source for the encode) - but i find it quicker and NEVER get any probs using XVID as a source in vdub.

Just my 2 cents

thanks.

[Alestrix]

Originally posted by droolian01
I'm not sure what you mean. If the low res video was heavily/poorly compressed then, yes, you will see macroblocks..
I think it was about low res videos watched at fullscreen. There can be seen blocks (=single pixels) due to insufficient smoothing/antialiasing.

- aL