[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。 =mYwO=:D O^~Z-;FA 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。 s4[PwD 所以,要點樣壓縮到好似前者一樣? ]ne gVI{eoJ 唔改變解像度,只改變碼率,應如何做? eL_Il.: }0}=-
g& m0p%R>:5 《死神》 yHf:/8Z General 2C AR2V| Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv M.9w_bW]#D Format : Matroska uqv S File size : 280 MiB )?{jD Duration : 24mn 7s R.KznJ Overall bit rate : 1 621 Kbps 1\Z/}FT Encoded date : UTC 2011-05-03 17:33:29 _P9*78 Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 X$*]$Ge> Writing library : libebml v0.7.9 + libmatroska v0.8.1 ?UV|m Video #1 4x-K0 ID : 1 yVe<+Z\7 Format : AVC >0JCu^9 Format/Info : Advanced Video Codec FGzn|I Format profile : [url=mailto:High@L4.0]High@L4.0[/url] hrW2#v Format settings, CABAC : Yes 8 .t3`FGH Format settings, ReFrames : 8 frames V
t(s4 Muxing mode : Container profile=Unknown@4.0 `>&K=C? Codec ID : V_MPEG4/ISO/AVC 4hx4/5[^ Duration : 23mn 55s T|-llhJ8 Nominal bit rate : 1 500 Kbps wpg7xx! Width : 1 280 pixels O t{~mMDp Height : 720 pixels ldnKV&N Display aspect ratio : 16:9 LT#EYnG Frame rate : 23.810 fps ?&-$Zog Original frame rate : 23.976 fps LSrKi$ Resolution : 24 bits @77+K:9I7 Colorimetry : 4:2:0 Mq='|0, Scan type : Progressive ?4#UW7I Bits/(Pixel*Frame) : 0.068 #$;}-* Writing library : x264 core 98 r1629 2e81ce1 ^/I.? :+ 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 "hnvND4= Audio #2 /\MkH\zg ID : 2 X0knM}5 Format : AAC ,AH2/^:%c Format/Info : Advanced Audio Codec P)O:lYX Format version : Version 4 uann'ho?q Format profile : LC s6k(K>P
l Format settings, SBR : No [r1dgwh8 Codec ID : A_AAC *|ef #-|D Duration : 24mn 7s ]wwN mmE Channel(s) : 2 channels XEBj=5sG Channel positions : L R X>%li$9
J. Sampling rate : 44.1 KHz TZhYgV Resolution : 16 bits $Lz!04 Text #3 Xp9 ]
9H. ID : 3 tgj5l#P Format : ASS sB5@6[VDI Codec ID : S_TEXT/ASS ~gaWZQXyu Codec ID/Info : Advanced Sub Station Alpha iB5q"hoZC Text #4 *D67&/g. ID : 4 (7ujJ}#, Format : ASS 2(5/#$t Codec ID : S_TEXT/ASS niyI$OC Codec ID/Info : Advanced Sub Station Alpha 1DlXsup&?# Wm4C(y@ ============================================= &Im-@rV! M)~sL1) 《GPX》 mqbCa6>_S General c-"vQ>ux+ Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv Uy|Tu~ Format : Matroska juI)Do2_ File size : 320 MiB CwD=nT5` Duration : 26mn 54s @Z5,j) Overall bit rate : 1 663 Kbps o]WcODJdl Encoded date : UTC 2011-05-16 14:48:07
#jsN Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 :!^NjO Writing library : libebml v1.0.0 + libmatroska v1.0.0 0\Tp/Ph Video #1 u$FL(m4 ID : 1 %
s@ Format : AVC 4"UH~A;^ Format/Info : Advanced Video Codec sN K^.0 Format profile : [url=mailto:High@L4.0]High@L4.0[/url] ZYt1V"2VJ Format settings, CABAC : Yes _sn<"B%> Format settings, ReFrames : 2 frames jO9!:L>b` Muxing mode : Container profile=Unknown@4.0 "ruYMSpU Codec ID : V_MPEG4/ISO/AVC -d-xsP}
s Duration : 26mn 52s Q.fUpa v Width : 640 pixels NLu[<u U* Height : 480 pixels =!)x`1j!S Display aspect ratio : 4:3 7yjun|Lt}X Frame rate : 23.976 fps I>q!co9n Original frame rate : 11.988 fps ^\[c][fo Resolution : 24 bits B6@q
`Bmw. Colorimetry : 4:2:0 VK!HuO9l Scan type : Progressive CM7NdK?I Writing library : x264 core 38 svn-341 {pdPp|YDZ- Audio #2 hl0\$ ID : 2 i(;.Y Format : AAC L9oLdWa(C Format/Info : Advanced Audio Codec 6&QOC9JW+7 Format version : Version 4 ;GKL[tI" Format profile : LC 9{e/ V) Format settings, SBR : Yes o'Fyo4Qd Format settings, PS : No $@l=FV_; Codec ID : A_AAC z]KJ4 Duration : 26mn 54s X"9N<)C Channel(s) : 2 channels W)'*Dcd Channel positions : L R xm5?C>vu( Sampling rate : 44.1 KHz eeBW~_W Resolution : 16 bits *sau['Ha
Video delay : -83ms i6$HwRZm# Title : Cantonese粵語 ox_DEg7l Language : Chinese e
tL?UF$ Audio #3 | UB)q5I ID : 3 ysPm4am$ Format : AAC `PUxR8y Format/Info : Advanced Audio Codec s}-j.jzB{ Format version : Version 4 ,N;2"$+E Format profile : LC hk$I- Format settings, SBR : Yes U ^nv) Format settings, PS : No /r2S1"(q Codec ID : A_AAC \RtFF Duration : 26mn 54s V(:wYk?ZR Channel(s) : 2 channels w`D$W&3> Channel positions : L R 59p'U /| Sampling rate : 44.1 KHz IG7,-3 Resolution : 16 bits ]O{i?tyX Video delay : -83ms 7yXJ\(6R_ Title : 日語 lMG+,?<uK& Language : Japanese Vf.*!`UH )wXE\$ ==============================================================
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