[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。 @bS>XWI> A
9F&XF7{ 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。 &Gxk~p< 所以,要點樣壓縮到好似前者一樣? C
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W._vikR 唔改變解像度,只改變碼率,應如何做? us$~6 RrGS$< vP
pbm 《死神》 6lsU/`. General ;I]TM#qGF Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv ?=f\oH$ Format : Matroska {/ZB>l@D>8 File size : 280 MiB Wf>UI)^n Duration : 24mn 7s 0nG&
LL5 Overall bit rate : 1 621 Kbps Za4 YD Encoded date : UTC 2011-05-03 17:33:29 Sr%~
5Q[W Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 u [fQvdl Writing library : libebml v0.7.9 + libmatroska v0.8.1 Iu%/~FgPj{ Video #1 E=HS'XKu[K ID : 1 >PL/>
Format : AVC ^J\)cw Format/Info : Advanced Video Codec HwM:bY
N Format profile : [url=mailto:High@L4.0]High@L4.0[/url] 29x
"E$e Format settings, CABAC : Yes ?jz{fU Format settings, ReFrames : 8 frames z[IG+2 Muxing mode : Container profile=Unknown@4.0 ;,@3bu>r Codec ID : V_MPEG4/ISO/AVC 4$SW~BpQ Duration : 23mn 55s $?ke " Nominal bit rate : 1 500 Kbps >Py; 6K Width : 1 280 pixels F#Z]Xq0r Height : 720 pixels y)Ip\.KV\ Display aspect ratio : 16:9 \#G`$JD Frame rate : 23.810 fps WNlWigwYl Original frame rate : 23.976 fps )u3<lpoTy Resolution : 24 bits .Uha %~% Colorimetry : 4:2:0 :,]%W $f= Scan type : Progressive JFR,QUT Bits/(Pixel*Frame) : 0.068 oV,>u5:B Writing library : x264 core 98 r1629 2e81ce1 h#;fBQ]
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 ~A>3k2N/e Audio #2 ~cU,3g ID : 2 /`:5#O Format : AAC qhL e[[> Format/Info : Advanced Audio Codec j31
Sc3vG Format version : Version 4 e?RHf_d3T- Format profile : LC 1fEV^5I Format settings, SBR : No "1h|1'S50? Codec ID : A_AAC {Qlvj.X
w Duration : 24mn 7s vseu
k@> Channel(s) : 2 channels
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&l Channel positions : L R |/YT.c% Sampling rate : 44.1 KHz \u",bMQF Resolution : 16 bits !mq+Oz~ Text #3 j.AAY?L ID : 3 9b()ck-\F# Format : ASS Y
1LE.{ Codec ID : S_TEXT/ASS 0&c12W|B<L Codec ID/Info : Advanced Sub Station Alpha ECU:3KH>MF Text #4 /d8P
Dc " ID : 4 LGRX@nF# Format : ASS cKF 8( Codec ID : S_TEXT/ASS dM#\h*:= Codec ID/Info : Advanced Sub Station Alpha X;ijCZb3
b g2w0#- ============================================= lN{-}f;TN ),dXaP[ 《GPX》 *,@dt+H!y General !W .ooy5( Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv Z5_U D Format : Matroska 97'*Xq File size : 320 MiB $(.[b][S Duration : 26mn 54s "P"~/<:) Overall bit rate : 1 663 Kbps \ec,=7S<Zf Encoded date : UTC 2011-05-16 14:48:07 YYZE-{ % Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 ?psvhB{O Writing library : libebml v1.0.0 + libmatroska v1.0.0 a
0Hzf Video #1 YRAWylm ID : 1 Y(-4Agq Format : AVC &0*j nb Format/Info : Advanced Video Codec PIsMx -i0 Format profile : [url=mailto:High@L4.0]High@L4.0[/url] 7rbl+:y2 Format settings, CABAC : Yes {: T'2+OH> Format settings, ReFrames : 2 frames ^8ZVB.Fv Muxing mode : Container profile=Unknown@4.0
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Codec ID : V_MPEG4/ISO/AVC Y?{L:4cRX Duration : 26mn 52s Rjqeuyj:
Width : 640 pixels WSz#g2a Height : 480 pixels BlF>TI%2 Display aspect ratio : 4:3 GKTrf\"c Frame rate : 23.976 fps T<=Ci?C
v Original frame rate : 11.988 fps NldeD2~H Resolution : 24 bits 7q&Ru|T33 Colorimetry : 4:2:0 rwWs\~.H Scan type : Progressive Y;O\ >o[ Writing library : x264 core 38 svn-341 F*_g3K!! Audio #2 0
XxU1w8\V ID : 2 ae`*0wbv Format : AAC oKLL~X>!U Format/Info : Advanced Audio Codec d~M;@<eD Format version : Version 4 fjVGps$j Format profile : LC iG( )"^G Format settings, SBR : Yes u(iEuF;7 Format settings, PS : No *p0n{F9 Codec ID : A_AAC ByqB4Hv2 Duration : 26mn 54s \Ld/'Z;w Channel(s) : 2 channels JR>#PJ,N- Channel positions : L R <Yif-9 Sampling rate : 44.1 KHz US3rkkgDO Resolution : 16 bits zg L0v5vk Video delay : -83ms /R\]tl#2j Title : Cantonese粵語 ~IrrX,mp: Language : Chinese U\dq
Mp#Wy Audio #3 /o%J /| ID : 3 - "`5r6 Format : AAC 7L2$(d4 Format/Info : Advanced Audio Codec 4B?8$&b Format version : Version 4 u By[x 0 Format profile : LC 0*7N= Format settings, SBR : Yes =LLix .
> Format settings, PS : No XL
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Codec ID : A_AAC W\f u0^ Duration : 26mn 54s BCUn[4Gp Channel(s) : 2 channels N_<wiwI
< Channel positions : L R (|Zah1k&] Sampling rate : 44.1 KHz ]nmVT~lBe" Resolution : 16 bits [3KP@'52k Video delay : -83ms V!^5#A< Title : 日語 v>S[}du Language : Japanese f&5'1tG .lbo\v}2W ==============================================================
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