[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。 [dP<A?s ,&4
[`d 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。 8A]8yX = 所以,要點樣壓縮到好似前者一樣? hz;SDaBA K/C} 唔改變解像度,只改變碼率,應如何做? hs;|,r d7b`X<=@s faLfdUimJ 《死神》 Q+K]:c General u c!6?+0h Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv ,B/TqPP Format : Matroska E
JC}"%h File size : 280 MiB um]*nXIr Duration : 24mn 7s 1_LKqBgo Overall bit rate : 1 621 Kbps lY`WEu Encoded date : UTC 2011-05-03 17:33:29 "~=}& Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 T<7}IH$6xE Writing library : libebml v0.7.9 + libmatroska v0.8.1 E#m^.B-} Video #1 YK8l#8K ID : 1 gM1:*YK Format : AVC ~oSA&v4V Format/Info : Advanced Video Codec e[T3,2C Format profile : [url=mailto:High@L4.0]High@L4.0[/url] teDRX13=; Format settings, CABAC : Yes
b}7g> Format settings, ReFrames : 8 frames ~P,Z@|c4 Muxing mode : Container profile=Unknown@4.0 n~`jUML2d Codec ID : V_MPEG4/ISO/AVC oSMIWwg7G Duration : 23mn 55s F'{ T[MA
Nominal bit rate : 1 500 Kbps #oEtLb@O Width : 1 280 pixels b4$.
uLY Height : 720 pixels !?i9fYu Display aspect ratio : 16:9 502(CO> Frame rate : 23.810 fps Y(rQ032s Original frame rate : 23.976 fps gf9,/m Resolution : 24 bits 4xs>X7 Colorimetry : 4:2:0 }W " i{s/ Scan type : Progressive u];\v%b Bits/(Pixel*Frame) : 0.068 ;+f(1=x Writing library : x264 core 98 r1629 2e81ce1 b9.7j!W 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 )06. dZq\ Audio #2 C;ha2UV0H ID : 2 .ejC#vB{KM Format : AAC &JLKHwi/ Format/Info : Advanced Audio Codec NODE`VFu Format version : Version 4 ct*~\C6Ze Format profile : LC ?=iy 6q Format settings, SBR : No 7[ kDc- Codec ID : A_AAC C\C*@9=&x Duration : 24mn 7s 0""%@X]m Channel(s) : 2 channels 4yxf/X) Channel positions : L R
!&KE">3Qu Sampling rate : 44.1 KHz 65&+Fv Resolution : 16 bits }V
H`\g} Text #3 z9AX8k(B6 ID : 3 E0r#xmk Format : ASS :]\-
GJV5 Codec ID : S_TEXT/ASS ezJ^
r,D| Codec ID/Info : Advanced Sub Station Alpha #c<F,` gdi Text #4 [e. `M{(TB ID : 4 2+(SR.oGq Format : ASS sV~|9 /r Codec ID : S_TEXT/ASS Cq=k3d#} Codec ID/Info : Advanced Sub Station Alpha :oZ~&H5Q 0#e
Pg6n ============================================= `kOp9(Q{ i}:^<jDv? 《GPX》 ,+n
{xI2 General ]tK<[8Y Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv gavf$be
Format : Matroska V,tYqhQ3 File size : 320 MiB :VRQd}$Pi Duration : 26mn 54s [9CBTSr Overall bit rate : 1 663 Kbps
4%jSqT@ Encoded date : UTC 2011-05-16 14:48:07 Z79Y$d>G<E Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 %.IW H9P7 Writing library : libebml v1.0.0 + libmatroska v1.0.0 |oOA;JC)( Video #1 d5LL(
" ID : 1 [DSzhi] Format : AVC &eg@ZnPn Format/Info : Advanced Video Codec kf",/?s2Z Format profile : [url=mailto:High@L4.0]High@L4.0[/url] H8qAj Format settings, CABAC : Yes
3AuLRI Format settings, ReFrames : 2 frames
5&U?\YNLa Muxing mode : Container profile=Unknown@4.0 $>l65)(E\ Codec ID : V_MPEG4/ISO/AVC <
M3&\ Duration : 26mn 52s MIAC'_<-e Width : 640 pixels gAGcbepX Height : 480 pixels 5=_))v<Tp Display aspect ratio : 4:3 kvt"7;( Frame rate : 23.976 fps (TGG?V Original frame rate : 11.988 fps [*=UH*:'N Resolution : 24 bits h4M>k{ Colorimetry : 4:2:0 R?,XSJ Scan type : Progressive 2mvp|<" Writing library : x264 core 38 svn-341 }cy<$=c#E_ Audio #2 _3Q8R
} ID : 2 A}03s6^i; Format : AAC `~W ?a Format/Info : Advanced Audio Codec 2I~a{:O Format version : Version 4 u@[JX1&3"n Format profile : LC {f%x8t$ Format settings, SBR : Yes )d?L*X~y' Format settings, PS : No 5fhe{d"si Codec ID : A_AAC T
3+lYE Duration : 26mn 54s pXxpEv
Channel(s) : 2 channels 9d,2d5Y Channel positions : L R ? m.Ry Sampling rate : 44.1 KHz Xu5^ly8p9q Resolution : 16 bits ?[Qxq34 Video delay : -83ms RZKczZGZg Title : Cantonese粵語 L)Ru]X` Language : Chinese gtb,}T=1 Audio #3 &uTK@ G+ ID : 3 7;:Uv= Format : AAC o>4GtvA* Format/Info : Advanced Audio Codec ?pF uV`Zm Format version : Version 4 }W R?n Format profile : LC ;=ERm= Format settings, SBR : Yes 3H/4$XJB Format settings, PS : No #]o#~:S= Codec ID : A_AAC Jro%zZle Duration : 26mn 54s -u'BK@; Channel(s) : 2 channels V IU4QEW`x Channel positions : L R [mI;>q Sampling rate : 44.1 KHz Jyu
*{ Resolution : 16 bits {[.<BU- Video delay : -83ms pSJc.j Title : 日語 a<`s'N1G Language : Japanese )h?Pz1-W1 ?qjlWCV|e ==============================================================
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