[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。 8:U0M'}u> } x
KvN 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。 69 J4p=c, 所以,要點樣壓縮到好似前者一樣? E( *S]Z[ S[CWrPaDQ 唔改變解像度,只改變碼率,應如何做? L+Gi y\:,.cZ+TQ ]dT]25V 《死神》 knzQ)iv&& General 'cY@Dqg1 Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv
GYonb)F Format : Matroska \5b<!Nl File size : 280 MiB %5;kNeD\Fq Duration : 24mn 7s V /)3d Overall bit rate : 1 621 Kbps ]@qD4: Encoded date : UTC 2011-05-03 17:33:29 3]>YBbXvE Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 {h;i x Writing library : libebml v0.7.9 + libmatroska v0.8.1 /sVmQqVY Video #1 AI .2os* ID : 1 !zxq9IhWR Format : AVC ]xhH:kW4 Format/Info : Advanced Video Codec "H{#ib_c_ Format profile : [url=mailto:High@L4.0]High@L4.0[/url] 'YEiT#+/ Format settings, CABAC : Yes os(}X(
Format settings, ReFrames : 8 frames jw]IpGTt Muxing mode : Container profile=Unknown@4.0 E}]SGU" Codec ID : V_MPEG4/ISO/AVC 87nsWBe Duration : 23mn 55s U9AtC.IG! Nominal bit rate : 1 500 Kbps S*rc XG6Q^ Width : 1 280 pixels H{;8i7% Height : 720 pixels td+[Na0d Display aspect ratio : 16:9 Sq2yQSd Frame rate : 23.810 fps ~0 n9In% Original frame rate : 23.976 fps < YuI}d~' Resolution : 24 bits g/,O51f' Colorimetry : 4:2:0 M~!LjJg; Scan type : Progressive R7By=Y!t Bits/(Pixel*Frame) : 0.068 Mq,_DQ Writing library : x264 core 98 r1629 2e81ce1 7h/{F({r= 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 GgjBLe=C Audio #2 8%9OB5?F6 ID : 2 8 _[f#s`) Format : AAC N:/$N@"Ge Format/Info : Advanced Audio Codec Sq==)$G Format version : Version 4 VbX$i!>8 Format profile : LC >heih%Ar0J Format settings, SBR : No W.,J' Codec ID : A_AAC Z_Ma|V?6 Duration : 24mn 7s Ic&t_B*i}] Channel(s) : 2 channels Xl*-A|:j Channel positions : L R F]?$Q'U Sampling rate : 44.1 KHz )Bk?"q Resolution : 16 bits c\4n 7m,y Text #3 k*c:%vC! ID : 3 @#H{nj
Z Format : ASS )SUN+YV^ Codec ID : S_TEXT/ASS .Um%6a- Codec ID/Info : Advanced Sub Station Alpha d8RpL{9\7 Text #4 rrwsj` ID : 4 )Y&D
e)= Format : ASS #1bgV Codec ID : S_TEXT/ASS F5<{-{Ky Codec ID/Info : Advanced Sub Station Alpha >;3c;nf i)(QNpv ============================================= 5PL,~Y ^&rbI,D 《GPX》 (
L6`_) General sTqB%$K} Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv \%Smp2K Format : Matroska Ul'G
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File size : 320 MiB pq&c]8H Duration : 26mn 54s v1lj /A Overall bit rate : 1 663 Kbps 5
UM[Iz Encoded date : UTC 2011-05-16 14:48:07 DJW1kR Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 |5/[0V-vy Writing library : libebml v1.0.0 + libmatroska v1.0.0 ^9RBG#ud Video #1 Mww]l[1'EL ID : 1 J?<L8;$s7 Format : AVC s?E: ] Format/Info : Advanced Video Codec 'x0t,
;g Format profile : [url=mailto:High@L4.0]High@L4.0[/url] >`uS NY"tO Format settings, CABAC : Yes
Dn3~8 Format settings, ReFrames : 2 frames xVyUUzXs Muxing mode : Container profile=Unknown@4.0 7. .vaq# Codec ID : V_MPEG4/ISO/AVC "p{'984r< Duration : 26mn 52s c" 7pf
T Width : 640 pixels !q/lgpEi Height : 480 pixels ^IpiNY/%Q Display aspect ratio : 4:3 zFr} $ Frame rate : 23.976 fps d"UW38K{ Original frame rate : 11.988 fps +CT$/k Resolution : 24 bits DV\ei") Colorimetry : 4:2:0 R6XMBYK^ Scan type : Progressive ~a%hRJg Writing library : x264 core 38 svn-341
,<^HB+{Wo Audio #2 HJR<d&l
;p ID : 2 Ekme62Q>u Format : AAC L"I] mQvd Format/Info : Advanced Audio Codec ] <3?=$ Format version : Version 4 b
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x81 Format profile : LC nln6:^w Format settings, SBR : Yes Sp,Q,Q4 Format settings, PS : No BpG'e-2 Codec ID : A_AAC '5/}MMT Duration : 26mn 54s q{/Jw"e Channel(s) : 2 channels 4E\ntufo Channel positions : L R (iOCzZ6S Sampling rate : 44.1 KHz 7&1~O# Resolution : 16 bits 'Q>z** Video delay : -83ms <-:@} |br Title : Cantonese粵語 L
1kM~M Language : Chinese 1DLG]-j} Audio #3 Va
Yu% ID : 3 ob0 8xGj Format : AAC 3E}NiD\V} Format/Info : Advanced Audio Codec cia-OVX Format version : Version 4 /;NE]{K Format profile : LC Yuo1'gE+ Format settings, SBR : Yes L;M^>{> Format settings, PS : No Wx?&igh Codec ID : A_AAC *e3L4 7"G Duration : 26mn 54s AuDR |;i Channel(s) : 2 channels $FQcDo|[ Channel positions : L R Z-t}6c'Kg Sampling rate : 44.1 KHz z/0yO@_D/q Resolution : 16 bits ";_K x={ Video delay : -83ms Z?(4%U5z Title : 日語 S*CLt Language : Japanese 4" ,
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