[問題]點樣壓縮視頻嘅碼率?
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比較下面兩集動畫。前者1280x720,比後者640x480嘅SIZE重要細。 S/& _ a02;Zl 雖然,後者有兩條音頻,但都係好細,13MB/條。就算將兩條音頻刪除,文件SIZ仍然係好大。 )s(J8J[b*L 所以,要點樣壓縮到好似前者一樣? g,U~3# P0,)
Gw 唔改變解像度,只改變碼率,應如何做? Ce}wgKzr O/$pT%D1x Oz!#);v 《死神》 ^ Afq)26D General n.p6+^ES Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv 0l !%}E Format : Matroska e~jw
YImA File size : 280 MiB }Og zSnR Duration : 24mn 7s JzMPLmgG/ Overall bit rate : 1 621 Kbps &=5 Encoded date : UTC 2011-05-03 17:33:29 !r$?66q/ Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 s2L|J[Y"s Writing library : libebml v0.7.9 + libmatroska v0.8.1 1iEZ9J? Video #1 A"FlH:Pn ID : 1 RRig
Format : AVC X6%w6%su5 Format/Info : Advanced Video Codec [TvH7ott'1 Format profile : [url=mailto:High@L4.0]High@L4.0[/url] n!
~mdI& Format settings, CABAC : Yes Es6b ~# Format settings, ReFrames : 8 frames /~V.qisZ Muxing mode : Container profile=Unknown@4.0 ao>bn
RXR Codec ID : V_MPEG4/ISO/AVC [R-4e; SRh Duration : 23mn 55s kVE%
" Nominal bit rate : 1 500 Kbps 5f
PYtVm Width : 1 280 pixels Px5ArSS Height : 720 pixels My0h
9'K Display aspect ratio : 16:9 lg1yj}br Frame rate : 23.810 fps .g_
BKeU Original frame rate : 23.976 fps |rkj$s, Resolution : 24 bits 0{g @j{Lbz Colorimetry : 4:2:0 I^sWf3'db Scan type : Progressive f~-81ctu Bits/(Pixel*Frame) : 0.068 qN}kDT Writing library : x264 core 98 r1629 2e81ce1 ~>zml1aJ6 Encoding settings : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=6 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / weightp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=1500 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=3486 / vbv_bufsize=3487 / ip_ratio=1.40 / aq=1:0.50 / nal_hrd=none F;Ms6 "K Audio #2 =cE:,z;g ID : 2 V`?2g_4N Format : AAC $>1 'pV Format/Info : Advanced Audio Codec WH2?_U-8h Format version : Version 4
Fv=7~6~ Format profile : LC N r5
aU6] Format settings, SBR : No eYBo* Codec ID : A_AAC =(b;Cow Duration : 24mn 7s aG;6^$H~ Channel(s) : 2 channels |xyr6gY Channel positions : L R
IE!fNuR4 Sampling rate : 44.1 KHz Yf
>SV # Resolution : 16 bits Bt4
X Text #3 J"'2zg1& ID : 3 =A&x
d" Format : ASS /WXy!W30< Codec ID : S_TEXT/ASS 5"xZ'M~= Codec ID/Info : Advanced Sub Station Alpha 68?oV)fE Text #4 h"/FqO ID : 4 uZ][#[u Format : ASS }yCJ#} Codec ID : S_TEXT/ASS zvB!= Codec ID/Info : Advanced Sub Station Alpha tyFhp:ZB Z\6&5r= ============================================= pisjfNT`o 4Z>hP]7
《GPX》 x;"! General x"h0Fe?J Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv e_s9E{( Format : Matroska {?m;DYv File size : 320 MiB }
r^@Xh Duration : 26mn 54s YgiwtZ5FY Overall bit rate : 1 663 Kbps bG=CIa&@ Encoded date : UTC 2011-05-16 14:48:07 HVaWv ]. Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 g{wIdV Writing library : libebml v1.0.0 + libmatroska v1.0.0 (v(!l=3 Video #1 D7cOEL< ID : 1 /l_$1<c Format : AVC 0.S].Y[ Format/Info : Advanced Video Codec c\~H_ ~F Format profile : [url=mailto:High@L4.0]High@L4.0[/url] bA\TuB Format settings, CABAC : Yes > ^fY`x, Format settings, ReFrames : 2 frames i>6SY83B} Muxing mode : Container profile=Unknown@4.0 rks+\e}^Z Codec ID : V_MPEG4/ISO/AVC X_|W#IM*+ Duration : 26mn 52s %\PnsnJ9Q Width : 640 pixels 6#VG,'e3 Height : 480 pixels Okm&b g Display aspect ratio : 4:3 ?PORPv# Frame rate : 23.976 fps <(W0N|1v Original frame rate : 11.988 fps yyZH1A Resolution : 24 bits qCK)FOU Colorimetry : 4:2:0 -dbD&8
Scan type : Progressive [tDUR Writing library : x264 core 38 svn-341 7><n e|% Audio #2 OQ"%(w>Hb ID : 2 7cin?Z1 Format : AAC Vr/UbgucJ Format/Info : Advanced Audio Codec lQQXV5NV Format version : Version 4 iK{q_f\" Format profile : LC y
A_;\\ Format settings, SBR : Yes 1\1a;Q3W%, Format settings, PS : No 8;9GM^L Codec ID : A_AAC Vt{C80n&N Duration : 26mn 54s k+S+: 5 Channel(s) : 2 channels 6ae Channel positions : L R ZxkX\gl91 Sampling rate : 44.1 KHz ,?i^i#Wqzg Resolution : 16 bits dq~p]h~,H Video delay : -83ms AH`D&V Title : Cantonese粵語 r4caI
V Language : Chinese Y W_E,A>h Audio #3 :0>wm@qCQ ID : 3 WL-+;h@VQ Format : AAC 'JY*K:- Format/Info : Advanced Audio Codec 8[5%l7's Format version : Version 4 *9e T#dH Format profile : LC Lu\]]m Format settings, SBR : Yes <b"ynoM.A Format settings, PS : No TN3, \qgV Codec ID : A_AAC p3O%|)yV Duration : 26mn 54s =Run Channel(s) : 2 channels ;SkC[;`J Channel positions : L R K0 .f4o Sampling rate : 44.1 KHz pHFlO!#]| Resolution : 16 bits *)"U5A/v) Video delay : -83ms R-]QU`c Title : 日語 ep<A
d Language : Japanese >R3~P~@30 _H^Ij ==============================================================
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