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View Full Version : Some tests on VHS source


Lenchik
30th December 2005, 22:33
I am not sure where to put this topic...

Here are results of tests that i was doing for my own purposes at 20051204 and 20051210. I just want to share them - maybe someone will find it useful.
Video was taken at 1995 by some JVC VHS-C camcorder, later it was copied to VHS tape.
Captured by ATI Multimedia Center MPEG2 VBR (avg 10 Mbit/s, max 15 Mbit/s) through x700 videocardcomposite TV-in 720x576 25 fps Pal-D.
Then it was filtered by avisynth 2.5.6a and compressed by XVID 1.02 singlepass (max bvops 1, motion 6, VHQ 4, max Iframe quantizer 4, max P-frame quantizer 6) through VirtualDub 1.6.11.

avisynth plugins used:
FixVHSOversharp (Beta 2)
dgmpgdec145
mpasource Version 0.3
degrainmedian 0.8
cnr2 2.6.1
tdeint v1.0 beta 4

Virtualdub plugins:
ACOBW v2.5 ("Automatic correction of balance white" http://acobw.narod.ru)

I tried to find combination of code that will be working faster and produce files of less size at the same visible quality. For now i believe that this is DGM, CNR2, FixVHSOversharp ("nick" in tests "galo") and ACOBW in some combination (for that particular video at least).
Some test are without tdeint...

Some parts of video are letterboxed by camcorder, so i tested how will affect performance if i will do something with this.

First group of tests was done on trimmed group of fragments of video.

"2" after some parts of filename means different way of code (see .avs in attached file if will find the way to attach file)

Some results sorted by size and some - by time.

Happy New Year!


Name Size, byte Time, minute
capture95MMC-cnr 21747686 11.87
capture95MMC-0 24837970 11.92
capture95MMC-dgm2 20676482 12.22
capture95MMC-dgm 20676482 12.35
capture95MMC-galo 23418078 12.71
capture95MMC-acobw 24744766 12.86
capture95MMC-dgm2+cnr2+galo2 18480902 13.02
capture95MMC-cnr2+galo2+acobw 21558198 13.46
capture95MMC-acobw+galo 24253668 13.54
capture95MMC-acobw+cnr+galo 21570948 13.59
capture95MMC-dgm2+cnr2+galo2+acobw 19391164 13.89
capture95MMC-dgm+cnr+galo+acobw 19376752 13.90
capture95MMC-acobw+dgm+galo 20122030 14.11
capture95MMC-acobw+dgm+cnr+galo 19222812 14.27


Name Size, byte Time, minute
capture95MMC-t21-0 101665718 42.26
capture95MMC-t22-0 99142506 50.12
capture95MMC-t22 68370804 55.74
capture95MMC-t21 68035804 48.58


Name Size, byte Time, minute
capture95MMC-t3-dgm+cnr+galo 90910244 32