it it better to convert from a big high quality avi or from a small not as good quality avi

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it it better to convert from a big high quality avi or from a small not as good quality avi

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badboy187

Junior Member

12. November 2003 @ 01:43

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hi peeps i really wanna know when encoding to from a avi (in my case huffyuv to svcd) is it better to encode from a large file (about 27 gigs) with 640-480 res high quality or from a small avi (about 7 gig) with 320-240 lower quality avi.

Its been bugging me for a while now and im not sure im thnking maybe th larger file and the reason im asking when i capture of my camcorder i aint sure now whether to go for the small file or large can ne any one help me please cheers.

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Manngo

Junior Member

12. November 2003 @ 03:14

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SVCD resolution is 480*480 (NTSC) or 576*480 (PAL)
To have better results use better quality (and of course bigger) input files. And U can use a codec to compress the video in the AVI. I prefer Xvid (2 hours 640*300 about 1,5-2 Gb).

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Minion

AfterDawn Addict

12. November 2003 @ 15:22

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You are Better off Captureing at the Highest Resolution you can say 720+480 to AVI useing HuffyUV, Then you can say useing something Like Virtual Dub to add filters and clean up the Image a Bit and Frameserve the File to TMPGEnc to encode to SVCD..Or you can Just use the Filters in TMPGEnc to clean up the Image but TMPGEnc filters aren"t as good...It is Allways Better to Go from High resolution to Low resolution than it is to Go from Low Resolution to High Resolution cuz Up sizeing the Resolution will greatly reduce the Video Quality....Cheers

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badboy187

Junior Member

13. November 2003 @ 02:15

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ok im trying to capture with a res of 640-480 using huffyuv and capturinig with fly video 2000(virtual dub wont capture for me higher then 320) and all is ok exept it drops about 40-50 frames , im capturing 1 hour 30 mins of my analog camera and cos the frames are dropping the audio is out of sync when the films finished capturing. what can i do i dont get it cos ii have a fast comp(p4 2.52 ghz 512 meg ddr ram )cheers.

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Minion

AfterDawn Addict

13. November 2003 @ 12:10

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You should try something like Virtual VCR cuz it has certain features in it that help it keep sync even if you drop frames ,Actually some Programs drop frames in an attempt to keep sync...

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badboy187

Junior Member

14. November 2003 @ 14:38

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ok ive been trying virtual vcr and sometimes it crashes but besides that i can get it to capture at 640-480 however (im not sure how to explain this but ill try) its as if u can see the lines when theres movements almost like a trial behind moving things.

I do get this when i use fly video 2000 but i can sort this out by using a blending clipping option it has but i cant see there a option like this on vcr what can i do now cheeers.

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Minion

AfterDawn Addict

14. November 2003 @ 15:17

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It sounds Like you are Talking about Interlaceing...If you are Makeing a SVCD out of the Captured File then don"t worry about it cuz most encoders have a "Deinterlace Filter" that you can use to get rid of that effect when you encode the File to SVCD...If you are useing TMPGEnc to encode the File then It has 16 Different De-interlace Filters to choose from but generally speaking "Even Field" or "Odd Field" is the best.....Cheers

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badboy187

Junior Member

16. November 2003 @ 04:24

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yip i tried it and it does work mate but i was thinking as i am making a SVCD for veiwing on my tv it wouldnt matter if i didnt deinterlace would it? cos tvs use interlace anyway so wouldnt it appear fine on tv but just not on pc.

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badboy187

Junior Member

16. November 2003 @ 05:41

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forgot to ask is there a good deinterlace filter i can get for virtual vcr

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Minion

AfterDawn Addict

16. November 2003 @ 12:44

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You shouldn"t deinterlace while captureing, cuz it uses a lot of extra CPU which can cause you to drop Frames...If you are going to deinterlace do it when you are encodeing your Captured file to SVCD.....Cheers

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badboy187

Junior Member

18. November 2003 @ 02:18

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ok i really cant understand this no ive done a couple of tests and it seems the more i get into this encoding the trickier and more annoying it gets.

what i did was capture my hi8 video in 320-240 res which gave a AVI i hr and 30 mins long and 8gig in size then i captured the hi8 video again in a res of 640-480 which gave me a AVI aroung 30 gig but when i convert to SVCD using the exact same settings the high res version is no better then the lower res)probably worse if anything) i cant understand this.

I cant see how i can get any better quality then what ive done already can any help please and also why would my computer drop frames ive read that other people capture at full res as where i can just about capture at 640-480 and i hav a fast comp 2.53 ghz 512ddr ram cheers.

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Minion

AfterDawn Addict

18. November 2003 @ 13:00

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Well For frame drops it isn"t really the speed of your Proscessor that is the most important it is the speed of your Hard drive and your IDE Bandwidth...Generally speaking you should allways capture to a seperate Fast Hard drive, I use an 160gb ATA/133 drive and it seems to work Pretty good...this is even more important when captureing to Uncompressed AVI because it uses a Lot of Bandwidth..What helps take some of the Pressure off your Hard drive is to use a codec when captureing..Useing the HuffyUV codec you can achieve the same quality as uncompressed AVI but while useing half the Disk Space .....
I have no idea why your Files don"t look any better captured at high resolution cuz in thoery the higher the resolution the better the Quality, all i can say is Try something new........Cheers

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afterdawn.com > forums > archived forums > mpeg-1 and mpeg-2 encoding (avi to dvd) > it it better to convert from a big high quality avi or from a small not as good quality avi


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