[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。 ~|Ih
JzDt }'V'Y[ 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。 ).+xcv 所以,要點樣壓縮到好似前者一樣? EkStb# |:=b9kv 唔改變解像度,只改變碼率,應如何做? YY:iPaGO GQ-e$D@SfB [> &+*c 《死神》 x|v[Dxf] General Gj7QGIKx Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv oyN+pFVB:$ Format : Matroska ;/";d]j File size : 280 MiB jO
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rxN Duration : 24mn 7s fteyG$-s Overall bit rate : 1 621 Kbps i[ Gw7'f Encoded date : UTC 2011-05-03 17:33:29 z<[.MH`ln Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 RM^?&PM85 Writing library : libebml v0.7.9 + libmatroska v0.8.1 GrLM${G Video #1 *]:G7SW{ ID : 1 D2TXOPH Format : AVC 3\p]esse Format/Info : Advanced Video Codec p~,3A:i Format profile : [url=mailto:High@L4.0]High@L4.0[/url] ;H
y!0n Format settings, CABAC : Yes E%k ]cZ Format settings, ReFrames : 8 frames a(x.{}uG, Muxing mode : Container profile=Unknown@4.0 yo?g"vbE Codec ID : V_MPEG4/ISO/AVC J"D&q Duration : 23mn 55s nXM9Px! Nominal bit rate : 1 500 Kbps ^;)SFmjg% Width : 1 280 pixels Q_dXRBv=n Height : 720 pixels ^i`3cCFB< Display aspect ratio : 16:9 r\l3_t Frame rate : 23.810 fps e<L 9k}c Original frame rate : 23.976 fps o]|oAN9 Resolution : 24 bits )~?S0]j} Colorimetry : 4:2:0 [al(>Wr9 Scan type : Progressive 0i`v:Lq% Bits/(Pixel*Frame) : 0.068 &v3D" J Writing library : x264 core 98 r1629 2e81ce1 f#;ubfi"z 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 s=q%:uCO Audio #2 sxN>+v11z ID : 2 PtRj9TT Format : AAC de=5=>P7 Format/Info : Advanced Audio Codec A{
i][1N Format version : Version 4 Jm]]>K8.3V Format profile : LC f
gK2.;> Format settings, SBR : No K)9j
je Codec ID : A_AAC d739UhKC Duration : 24mn 7s .fLi
X x Channel(s) : 2 channels F,L82N6\U Channel positions : L R xI`Uk8- 8 Sampling rate : 44.1 KHz %S
>xSqX Resolution : 16 bits @sB}q 6> Text #3 ?;:9
W ID : 3
7GBZA=J Format : ASS 4hsPbUx9 Codec ID : S_TEXT/ASS ;I!+lx3[ Codec ID/Info : Advanced Sub Station Alpha g)Vq5en* Text #4 ]b0zkoD9< ID : 4 Zzw}sZ?8 Format : ASS wc6
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Codec ID : S_TEXT/ASS +X* F<6mZ Codec ID/Info : Advanced Sub Station Alpha 9D{u,Q V l#2r.q^$| ============================================= 7X9+Qj; ~4MtDf 《GPX》 vCy.C
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f+Eh Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv D+ah ok Format : Matroska 2cs?("8e% File size : 320 MiB P;)2*:--) Duration : 26mn 54s WX%h4)z* Overall bit rate : 1 663 Kbps mC*W2#1pF Encoded date : UTC 2011-05-16 14:48:07 26\HV Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 G?Qe"4
. Writing library : libebml v1.0.0 + libmatroska v1.0.0 L?3VyBE Video #1 6pM"h5hA ID : 1 W\I$`gyC/ Format : AVC }
D/+< Format/Info : Advanced Video Codec ')AByD}Hi] Format profile : [url=mailto:High@L4.0]High@L4.0[/url] ]6a/0rg:t Format settings, CABAC : Yes ^G|w8t+^ Format settings, ReFrames : 2 frames tIi!*u
Muxing mode : Container profile=Unknown@4.0 m+D2hK* Codec ID : V_MPEG4/ISO/AVC .;<7424(% Duration : 26mn 52s G
]L0eV Width : 640 pixels U=haXx4N Height : 480 pixels +?URVp Display aspect ratio : 4:3 9l]UE0yTL/ Frame rate : 23.976 fps v?Z'[l Original frame rate : 11.988 fps |Q5H9<* Resolution : 24 bits k9*J*7l-m Colorimetry : 4:2:0 #W>x
\ Scan type : Progressive F`YFo)W Writing library : x264 core 38 svn-341 X0^zw^2W Audio #2 bajC-5R1k ID : 2 uuI3NAi~ Format : AAC q
Axf5 Format/Info : Advanced Audio Codec B]'e$uyL7 Format version : Version 4 Tjd&
^m Format profile : LC 3q'K5}
_ Format settings, SBR : Yes +O|_P`HBoI Format settings, PS : No #@nZ4=/z Codec ID : A_AAC httls>:xB| Duration : 26mn 54s y-E1]4?}) Channel(s) : 2 channels #rhVzN-?)W Channel positions : L R 2LCc Sampling rate : 44.1 KHz Bv;I0i:_
Resolution : 16 bits EsT
0"{ Video delay : -83ms
ggrI>vaw Title : Cantonese粵語 {M` Language : Chinese
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Audio #3 )v${&H ID : 3 &tlR~?$e* Format : AAC +<)tql* Format/Info : Advanced Audio Codec aj&\CJ Format version : Version 4 @;||peU Format profile : LC pWMiCXnW Format settings, SBR : Yes D"`%|`O Format settings, PS : No @Djs[Cs<* Codec ID : A_AAC mcvDxjk,h Duration : 26mn 54s PfVEv * Channel(s) : 2 channels o
&CghF Channel positions : L R b cC\ Sampling rate : 44.1 KHz \ua9thOG Resolution : 16 bits kFS0i%Sr Video delay : -83ms &(lMm ) Title : 日語 11i"nR| Language : Japanese |!$ Q<-]f Sv.KI{;v$ ==============================================================
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