[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。 ]bgY6@M YCw('i(| 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。 ~F#A
Pt 所以,要點樣壓縮到好似前者一樣? &-GuKH(Y< =J@`0H" 唔改變解像度,只改變碼率,應如何做? v_sm D{AFL.r{ =ef1XQ{i* 《死神》 lIuXo3 General K&UE0JO' Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv )!C7bTv 4 Format : Matroska IT1PPm File size : 280 MiB Tiprdvm< Duration : 24mn 7s y~p4">] Overall bit rate : 1 621 Kbps *mV&K\_ Encoded date : UTC 2011-05-03 17:33:29 H'h#wV`( Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 L*O>IQh2 Writing library : libebml v0.7.9 + libmatroska v0.8.1 ou;qO
5CT Video #1 tE:X,Lt
[ ID : 1 &gWiu9WbS Format : AVC IM$0#2\ Format/Info : Advanced Video Codec #Jv43L H Format profile : [url=mailto:High@L4.0]High@L4.0[/url] .d
e Format settings, CABAC : Yes H1C%o0CPY Format settings, ReFrames : 8 frames 94+/wzWvi Muxing mode : Container profile=Unknown@4.0 J&
)#G@fRX Codec ID : V_MPEG4/ISO/AVC )ZN(2z Duration : 23mn 55s 4XD)E& Nominal bit rate : 1 500 Kbps o|+E+l9\ Width : 1 280 pixels Yg$@ Wb6 Height : 720 pixels [qW<D/@ Display aspect ratio : 16:9 T6,V Frame rate : 23.810 fps E3LBPXK Original frame rate : 23.976 fps 9e-*JYF]C Resolution : 24 bits y{YXf!AS Colorimetry : 4:2:0 y-%nJD$ Scan type : Progressive ~."!l'a Bits/(Pixel*Frame) : 0.068 wH+FFXGJs Writing library : x264 core 98 r1629 2e81ce1 MRjH40"2 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 W\&WS"=~ Audio #2 @>M8Pe ID : 2 wEBtr
e7 Format : AAC 8.*\+nH Format/Info : Advanced Audio Codec "}0)YRz% Format version : Version 4 "L9C Format profile : LC 3DxZ#/! Format settings, SBR : No I++W0wa.n Codec ID : A_AAC f%bc64N( Duration : 24mn 7s A Oby*c Channel(s) : 2 channels 08zi/g2
3 Channel positions : L R o,*folL Sampling rate : 44.1 KHz fl}
rz Resolution : 16 bits xDPQG`6 Text #3 r4;5b s6wm ID : 3 K!IF?iell Format : ASS iYO
wB'z Codec ID : S_TEXT/ASS '#cT4_D^lI Codec ID/Info : Advanced Sub Station Alpha /3)YWFZZc Text #4 -4*'WzWr ID : 4 m
wRLzN Format : ASS A@@)
lD. Codec ID : S_TEXT/ASS Dyouk+08x Codec ID/Info : Advanced Sub Station Alpha dI#8CO C>w9
{h ============================================= 1WUFk ?p c{m
;"ZCFS 《GPX》 \pewbu5^ General e\d5SKY Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv -~<q,p"e Format : Matroska yNLa3mW File size : 320 MiB wQdW
lon Duration : 26mn 54s A5.'h< Overall bit rate : 1 663 Kbps `jUS{ 3^ Encoded date : UTC 2011-05-16 14:48:07 XZep7d} Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 bn*{*=(| Writing library : libebml v1.0.0 + libmatroska v1.0.0 -9H!j4]T? Video #1 St7D.| ID : 1 ]:E! i^C`Z Format : AVC jzJ1+/
9 Format/Info : Advanced Video Codec /qkIoF2 Format profile : [url=mailto:High@L4.0]High@L4.0[/url] '9p5UC Format settings, CABAC : Yes bF Y)o Z Format settings, ReFrames : 2 frames zIYr0k*% Muxing mode : Container profile=Unknown@4.0 ZvnZ}t>? Codec ID : V_MPEG4/ISO/AVC F{H0
% Duration : 26mn 52s G4exk5 Width : 640 pixels ! ?U^+)^$ Height : 480 pixels -TU{r_!Z( Display aspect ratio : 4:3 W$MEbf%1 Frame rate : 23.976 fps ~
%YTJS Original frame rate : 11.988 fps l[\,
*C Resolution : 24 bits }Keon.N? Colorimetry : 4:2:0 s)DNLx
Scan type : Progressive xE-`
Bb Writing library : x264 core 38 svn-341 yJ`1},^ Audio #2 R6@~ ID : 2 GGQ(|?w Format : AAC I;.E}k Format/Info : Advanced Audio Codec 70*iJ^| Format version : Version 4 _3G)S+7# Format profile : LC
*P\_:>bV( Format settings, SBR : Yes '\E{qlI Format settings, PS : No ;Y&?ixx Codec ID : A_AAC R*{?4NKG Duration : 26mn 54s GfPz^F=ie. Channel(s) : 2 channels U7%pOpO! Channel positions : L R Y"rV[oe Sampling rate : 44.1 KHz 'wnY>hN Resolution : 16 bits \.|A,G= Video delay : -83ms CWsv#XOg] Title : Cantonese粵語 lBZ*G Language : Chinese Vzm+Ew
_ Audio #3 q0Lt[*q3R ID : 3 .(]1PKW Format : AAC ByvqwJY Format/Info : Advanced Audio Codec `b'J*4|oGo Format version : Version 4 K -1~K Format profile : LC OVf|4J/Yx Format settings, SBR : Yes Jo+C!kc Format settings, PS : No 0\*<k`dY Codec ID : A_AAC RUh{^3;~ Duration : 26mn 54s +@7R,8 Channel(s) : 2 channels dsuW4^l Channel positions : L R XX6)(
Sampling rate : 44.1 KHz S-|$sV^cG Resolution : 16 bits N3RwcM9+; Video delay : -83ms 8, ^UQ5
x Title : 日語 wX;NU4)n Language : Japanese sOmYQ{R -+/| ==============================================================
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