Xvid settings for analog input

[junglemike]

Hi everyone. I need your advice on the following topic.
I'm using Xvid alot For Dvd->(1/2)CD conversion and for compressing DVD- to Palm playable format(320x176@12fps) In both cases i used setting from guides mentiond in this theread, and i'm totally satisfied with results.
What a'm trying to do now - is to compress some material captured though analog (bt848) TV-card). The problem is - i get very bad quality Even with high bitrate (~1500kbps) For example, even with bitrate about 500 with dvd content quality is better than in case of tv source. Can anyone Recommend me some settings for my case?
I capture pretty "noisy" input with 768x576 res 25fps, Using huffyuv or mjpeg codec, interlaced. Than apply deinterlace filter, and resize (bilinear) to 640x480 or 480x360. Since from version 1.0 i heared that 1st pass doesn't indicate "best quality" and maximum filesize for specified settings. So i don't know what bitrate to choose. Sure i can put , for example, bitrate 3000kbps and i believe it will look OK, So 4min clip will take 100mb!. I'm sure there is something else i could do to get better quality with lower bitrate (1000-1500).
Awaiting for your proposals.

P.s: Xvid settings i use: 3bframes/1.5/1.0/quant type=h.263/closed/Gov/vhq=4/chroma/rest=default

[Koepi]

Usually the quality of TV rips isn't at all comparable with DVD.

I do TV captures every now and then, and the quality IMO sucks badly. But that isn't a codec issue - it's simply that there isn't much detail/information in the images.

Maybe it's this thing you're experiencing?

Koepi

[Soulhunter]

Originally posted by junglemike
I capture pretty "noisy" input with 768x576 res 25fps, Using huffyuv or mjpeg codec, interlaced. Than apply deinterlace filter, and resize (bilinear) to 640x480 or 480x360.
So, you dont use any de-noisers ???

When not, this could be already the answer... ;)

Very noisy sources eat up much bitrate, and will tend to artifacts (floating walls etc...) !!!


If you dont know which de-nosier(s) to use...

Hint1... (http://forum.doom9.org/showthread.php?s=&threadid=51181)

Hint2... (http://forum.doom9.org/showthread.php?s=&threadid=70453)

Download them !!! (http://www.avisynth.org/warpenterprises)


Bye

[Koepi]

Ok, if the sources aren't denoised... the quality will be even worse. But still, even with proper denoising (i use i.e. ConvertToYUV2().PeachSmoother().ConvertToYV12() ) the quality is still in another galaxy when watching a DVD as comparison.

I found peachsmoother to be more effective than Convolution3d() btw. - just another hint ;)

Regards
Koepi

[junglemike]

Thanks you guys very much. Didn't use any denoise filters cause dind't know about them. Will try them now and see how it helps:)