[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。 V^3L3|k pA9+Cr!0Q 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。 i;/5Y'KZ 所以,要點樣壓縮到好似前者一樣? 3RY
pJAH u%}nw :> 唔改變解像度,只改變碼率,應如何做? x=b7': nQ ,z;cbsV-{ ]P.'>4 《死神》 j27?w< General /?@3.3sl_ Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv pGJ>O/% Format : Matroska H*ow\
Ct File size : 280 MiB Nl^;A><u Duration : 24mn 7s B@&4i?yJ Overall bit rate : 1 621 Kbps CG0
M Encoded date : UTC 2011-05-03 17:33:29 6$kq aS## Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 F Sw\_[^CQ Writing library : libebml v0.7.9 + libmatroska v0.8.1 e+~\+:[? Video #1 ,]46I.] ID : 1 wQ^EYKD Format : AVC -:|?h{q?u Format/Info : Advanced Video Codec #$18*?tLv| Format profile : [url=mailto:High@L4.0]High@L4.0[/url] cAY: AtD Format settings, CABAC : Yes /|tJ6T1LrB Format settings, ReFrames : 8 frames
coW:DFX Muxing mode : Container profile=Unknown@4.0 &;^YBW :I Codec ID : V_MPEG4/ISO/AVC Fv~20G(O Duration : 23mn 55s <0b)YJb4M Nominal bit rate : 1 500 Kbps =/s>Q l Width : 1 280 pixels ,\_1w Height : 720 pixels ,K9*%rW) Display aspect ratio : 16:9 WI-&x
' Frame rate : 23.810 fps ,}3
'I [ Original frame rate : 23.976 fps W42iu"@ Resolution : 24 bits em,u(#)& Colorimetry : 4:2:0 "i y Scan type : Progressive 7 HIeJ Bits/(Pixel*Frame) : 0.068 vB.E3 r= Writing library : x264 core 98 r1629 2e81ce1 K^1o DP Encoding settings : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=6 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / weightp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=1500 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=3486 / vbv_bufsize=3487 / ip_ratio=1.40 / aq=1:0.50 / nal_hrd=none B2>H_dmQ Audio #2 ;LcZ`1 ID : 2 #M9~L[nFS Format : AAC "I3@m%qv Format/Info : Advanced Audio Codec RRmz"j> Format version : Version 4 @.$|
w>>T Format profile : LC
}Yb[ Format settings, SBR : No
^E;kgED5 Codec ID : A_AAC U#lCj0iUt, Duration : 24mn 7s [tlI!~Z Channel(s) : 2 channels i3tg6o4C Channel positions : L R GeyvId03H Sampling rate : 44.1 KHz mk.9OhYY Resolution : 16 bits uatm/o^~, Text #3 zr-*$1eu ID : 3 4{y)TZ Format : ASS \UPjf]& Codec ID : S_TEXT/ASS r)y=lAyF> Codec ID/Info : Advanced Sub Station Alpha bo2H]PL* Text #4 l3Xfc2~ 2 ID : 4 ((H^2KJn Format : ASS wjHzE
Codec ID : S_TEXT/ASS Q_"]+i]s@ Codec ID/Info : Advanced Sub Station Alpha 6n,i0W 6HT;#Znn ============================================= smlpD3?va ;rF\kX&Jh 《GPX》 J"!vu.[ General cS5Pl Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv )#?
"Gjf~ Format : Matroska |n2qVR, File size : 320 MiB ;O,+2VzP%^ Duration : 26mn 54s cr%"$1sY; Overall bit rate : 1 663 Kbps gwLf ' Encoded date : UTC 2011-05-16 14:48:07 Cy
JEY- Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 95ZyP! Writing library : libebml v1.0.0 + libmatroska v1.0.0 Rw"sJ) / Video #1 qX/y5F` ID : 1 v[
.cd*b Format : AVC %'bM){ Format/Info : Advanced Video Codec /a{la
8Ni Format profile : [url=mailto:High@L4.0]High@L4.0[/url] "un]Gc Format settings, CABAC : Yes VLOO8N[o Format settings, ReFrames : 2 frames zwhe Muxing mode : Container profile=Unknown@4.0 [)H&'5 +F Codec ID : V_MPEG4/ISO/AVC ,|3MG",@@h Duration : 26mn 52s 6Y^23W F Width : 640 pixels nr95YSH Height : 480 pixels (l\1n;s*B Display aspect ratio : 4:3 !\-{D$E?H Frame rate : 23.976 fps K18}W*$
d Original frame rate : 11.988 fps bWH&P/> Resolution : 24 bits g2BHHL;` Colorimetry : 4:2:0 F}F&T Scan type : Progressive /NLui@|R Writing library : x264 core 38 svn-341 Z/W:97M Audio #2 x3hB5
p$q ID : 2 [A~y%bI" Format : AAC i`(XLi}k Format/Info : Advanced Audio Codec vx1c,8 Format version : Version 4 @3) (BpFe Format profile : LC #*D)Q/k Format settings, SBR : Yes Yrb{ByO& Format settings, PS : No '9laa=H%8 Codec ID : A_AAC fa-IhB1!K Duration : 26mn 54s qB~rQPa Channel(s) : 2 channels ,kiv>{ Channel positions : L R /
z4$gb7Y Sampling rate : 44.1 KHz WYH Q? Resolution : 16 bits 3-[q4R Video delay : -83ms lNz7u:U3 Title : Cantonese粵語 _tiujP Language : Chinese -z-C*%~ Audio #3 *F+KqZ.2 ID : 3 g,Lq)'N;O Format : AAC uW=k K0E Format/Info : Advanced Audio Codec o
m^0}$V Format version : Version 4 \MA+f~)9 Format profile : LC ^UciW Format settings, SBR : Yes :G [|CPm- Format settings, PS : No QqDC4+p" Codec ID : A_AAC wrc,b{{[iM Duration : 26mn 54s 4;w;'3zq Channel(s) : 2 channels sQ=]N
F)\ Channel positions : L R @D.}\( Sampling rate : 44.1 KHz lAS#874dE Resolution : 16 bits 9Z|jxy Video delay : -83ms ];VA!++ Title : 日語 P9GN}GN%v Language : Japanese n D0K).=Q rxe>}ZO ==============================================================
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