[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。 YQO9$g0%
~ {qS Ye!` 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。 WO+>W+|N 所以,要點樣壓縮到好似前者一樣? OF!n}.O( s=#[>^? 唔改變解像度,只改變碼率,應如何做? uH)v\Js 3.?oG5P# ^p\n/#B 《死神》 xw1n;IO4 General $\nAGmp@ Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv TaTw,K|/ Format : Matroska /JP%gD"8 File size : 280 MiB 0
|Rmb Duration : 24mn 7s L' x[wM0w; Overall bit rate : 1 621 Kbps (V8lmp-F Encoded date : UTC 2011-05-03 17:33:29 !O/(._YB` Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 /p[lO g Writing library : libebml v0.7.9 + libmatroska v0.8.1 Hl*/s Video #1 t|k-Bh:x ID : 1 _
n3" Format : AVC Cn8w})B Format/Info : Advanced Video Codec P&8QKX3
j^ Format profile : [url=mailto:High@L4.0]High@L4.0[/url] XZ1<sm8t." Format settings, CABAC : Yes ^-pHhh|g Format settings, ReFrames : 8 frames sRf?JyB Muxing mode : Container profile=Unknown@4.0 G'
a{;3 Codec ID : V_MPEG4/ISO/AVC d^YM@>% Duration : 23mn 55s $56Z/* Nominal bit rate : 1 500 Kbps i slg5 Width : 1 280 pixels \>GHc} Height : 720 pixels CLX!qw]@ + Display aspect ratio : 16:9 ~xP4}gs1 Frame rate : 23.810 fps $
-n?q w Original frame rate : 23.976 fps I~P]_DmM Resolution : 24 bits n{v[mqm^ Colorimetry : 4:2:0 #99fFs`w Scan type : Progressive 1{7*0cv$iL Bits/(Pixel*Frame) : 0.068 g4
G?hv`R Writing library : x264 core 98 r1629 2e81ce1 57 eA(
uI Encoding settings : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=6 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / weightp=0 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=1500 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=3486 / vbv_bufsize=3487 / ip_ratio=1.40 / aq=1:0.50 / nal_hrd=none GH!Lu\y\ Audio #2 r @
IyK% ID : 2 w-M,@[G Format : AAC Pn[R.u(l Format/Info : Advanced Audio Codec nd)bRB Format version : Version 4 :CJ]^v Format profile : LC +)eI8o0# Format settings, SBR : No gnPu{-Ec* Codec ID : A_AAC P5^<c\Mr,Y Duration : 24mn 7s Z}Ld!Byz Channel(s) : 2 channels xJ18M@"j Channel positions : L R i`}nv, Sampling rate : 44.1 KHz ev_4!+ko Resolution : 16 bits wZ_k]{J Text #3
o2C{V1nB ID : 3 .7|kxJq Format : ASS 3+j!{tJ
z2 Codec ID : S_TEXT/ASS /d\#|[S Codec ID/Info : Advanced Sub Station Alpha \q0wY7w Text #4 vCB0x:/ ID : 4 K~ 6[zJ4 Format : ASS l,pI~A`w_ Codec ID : S_TEXT/ASS 6/Pw'4H9$ Codec ID/Info : Advanced Sub Station Alpha lLb"><8a /kLG/ry8l: ============================================= sfv{z!mo iIe\m V 《GPX》 gW[(gf.oo General q
(?%$u. Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv
yv@td+-"D Format : Matroska &ZmHR^Flz File size : 320 MiB |N{?LKR
% Duration : 26mn 54s @w H+,]xE Overall bit rate : 1 663 Kbps yO7xAb
Encoded date : UTC 2011-05-16 14:48:07 'DB4po. Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 /:YJ2AARY Writing library : libebml v1.0.0 + libmatroska v1.0.0 Y_H|Fl^ Video #1 kFJ sB,2- ID : 1 Y'75DE<BC Format : AVC }b//oe7 Format/Info : Advanced Video Codec 7*!h:rg Format profile : [url=mailto:High@L4.0]High@L4.0[/url] h";0i: Format settings, CABAC : Yes e?Pzhha Format settings, ReFrames : 2 frames ]kJinXHW Muxing mode : Container profile=Unknown@4.0 /rKdxsI* Codec ID : V_MPEG4/ISO/AVC S,K'y?6 Duration : 26mn 52s X*Ibk-PUM Width : 640 pixels $6W o$c% Height : 480 pixels g4NxNjM; Display aspect ratio : 4:3 xQ4'$rL1d Frame rate : 23.976 fps O!0YlIvWv Original frame rate : 11.988 fps y7K&@Y Resolution : 24 bits "bO\Wt#Mf Colorimetry : 4:2:0 yPgDb[V+ Scan type : Progressive *Q?ZJS~ Writing library : x264 core 38 svn-341 '$5.{o`s*1 Audio #2 0JQ0lzk1 ID : 2 +-~:E_G Format : AAC `yjHLg Format/Info : Advanced Audio Codec MXSN
< Format version : Version 4 8.-0_C*U; Format profile : LC E7A psi4] Format settings, SBR : Yes L*
k[Vc Format settings, PS : No -E6#G[JJ Codec ID : A_AAC (=v :@\r Duration : 26mn 54s +T*=JHOD Channel(s) : 2 channels _[zZm
* Channel positions : L R !PQ%h/ix Sampling rate : 44.1 KHz U} EaV< Resolution : 16 bits #fq%903=
Video delay : -83ms l^.d3b Title : Cantonese粵語 m3Mo2};? Language : Chinese lHRs3+ Audio #3 k
q;1Ax0{ ID : 3 ~r/"w'dB Format : AAC }6;K+INT Format/Info : Advanced Audio Codec
Bw;gl^:UG Format version : Version 4 =?o, ' n0 Format profile : LC
lSMv9:N Format settings, SBR : Yes !+sC'/ Format settings, PS : No |u r/6{Oj1 Codec ID : A_AAC _n6ge*,E Duration : 26mn 54s U_s3)/' Channel(s) : 2 channels ChvSUaCS Channel positions : L R 26SXuFJ@ Sampling rate : 44.1 KHz n$2IaE;v Resolution : 16 bits W''%{A/' Video delay : -83ms QO1pwrX< Title : 日語 -L4fp
Language : Japanese 0 ge"ISK 2C6o?*RjyY ==============================================================
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