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sswroom
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加入日期: Aug 2003
您的住址: Hong Kong
文章: 308
測試結果出來了...

影像方面,測試了三種編碼/編碼器:
Helix Producer Basic 9.0.1.250
XviD 1.00 Beta 1 (Aloha)
DivX 5.1.1

測試影像:
れゼゎゆ☆ЪュみХцみ Music Clip - Shooting Star (開頭的45秒)

Codec設定:
Xvid:
Profiles: Unrestricted profile, H.263, Adaptive qualtization, BVOP = 0
Zone: frame 0, Weight 1.00, Chroma optimizer
Advance option: 6-Ultra High, 4-Wide Search, Use Chroma Motion, Use Cartoon Mode,min IPB quantizer = 1

DivX:
Profiles: No profile, B-Frame = off
1-Pass bitrate


結果 - 1500kbps版:
RMVB - 8,627,653 Bytes
Total frames processed: 1091
Minimum Average Maximum
Y: PSNR: 8.2838 27.2791 1.#INF
U: PSNR: 17.2386 39.9016 1.#INF
V: PSNR: 16.8496 40.7707 1.#INF
Sum: PSNR: 9.9590 28.9334 1.#INF

Mean Absolute Deviation: 0.0000 1.9797 62.6568
Mean Deviation: -45.2668 0.0380 54.6310
PSNR: 9.9590 28.9334 1.#INF




XviD - 6,696,456 Bytes
Total frames processed: 1092
Minimum Average Maximum
Y: PSNR: 43.4940 47.2607 1.#INF
U: PSNR: 47.0921 50.4688 1.#INF
V: PSNR: 47.0959 50.2559 1.#INF
Sum: PSNR: 44.5057 48.0704 1.#INF

Mean Absolute Deviation: 0.0000 0.6350 1.1099
Mean Deviation: -0.1738 -0.0062 0.0757
PSNR: 44.5057 48.0704 1.#INF



DivX - 6,448,640 Bytes
Total frames processed: 1092
Minimum Average Maximum
Y: PSNR: 41.6864 46.6734 1.#INF
U: PSNR: 44.0793 49.9144 1.#INF
V: PSNR: 44.4451 49.6491 1.#INF
Sum: PSNR: 42.5093 47.4843 1.#INF

Mean Absolute Deviation: 0.0000 0.6650 1.2695
Mean Deviation: -0.1899 -0.0395 0.3511
PSNR: 42.5093 47.4843 1.#INF


注:RMVB的檔案製作可能有些問題,把所有Frame解碼會令VDubMod當掉,所以只好刪去最後一Frame。
RMVB的PSNR極低的原因是它在高動態的畫面PSNR急跌,最低更跌破10dB,它的靜態畫質不差,有些畫面更勝XviD和DivX。
舊 2003-12-03, 12:16 AM #4
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