[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。 a
JQ_V #O7phjzgD 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。 |;YDRI 所以,要點樣壓縮到好似前者一樣? R5<:3tk=X @X_)%Y-^O 唔改變解像度,只改變碼率,應如何做? }IKU^0M9<T 5g 2:o^ tpP68)<ns 《死神》 xB}B1H% General "h&[6-0' Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv ~sCdvBA Format : Matroska ^5-SL?E File size : 280 MiB i\RB KF Duration : 24mn 7s T`Xz*\}Zb Overall bit rate : 1 621 Kbps t\\<+^[% Encoded date : UTC 2011-05-03 17:33:29 gyCXv0*z Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 a%wa3N=v Writing library : libebml v0.7.9 + libmatroska v0.8.1 Q*/jQC Video #1 &3P
"l.j ID : 1 c2yZvi Format : AVC AQ,%5MeqJ Format/Info : Advanced Video Codec Ystd[ Format profile : [url=mailto:High@L4.0]High@L4.0[/url] hTQ]xN) Format settings, CABAC : Yes M7neOQHq Format settings, ReFrames : 8 frames q)tNH/ Muxing mode : Container profile=Unknown@4.0 pAcu{5#7 Codec ID : V_MPEG4/ISO/AVC kX:8sbZ##4 Duration : 23mn 55s Wk]E6yz6 Nominal bit rate : 1 500 Kbps RNX>I,2sh Width : 1 280 pixels Z'c9xvy5 Height : 720 pixels i6E~]&~.v Display aspect ratio : 16:9 Ia>~ph#]{` Frame rate : 23.810 fps H`T}k+e2-N Original frame rate : 23.976 fps JiiYl Resolution : 24 bits r#^uY:T% Colorimetry : 4:2:0 ES
[]A&tf Scan type : Progressive tSaD=# v Bits/(Pixel*Frame) : 0.068 N\x<'P4q Writing library : x264 core 98 r1629 2e81ce1 g=S|lVQm 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 'Y>@t6E4 Audio #2 9NqZ&S ID : 2 >+*lG>!z Format : AAC Kj|\ALI': Format/Info : Advanced Audio Codec 0Y*Ag,S Format version : Version 4 ZZW%6 -B Format profile : LC h ?+vH{}j Format settings, SBR : No :Y&h'FGZm Codec ID : A_AAC *BQy$dfE Duration : 24mn 7s MNKY J Channel(s) : 2 channels g|)yM^Vqr6 Channel positions : L R V"|j Dnn5 Sampling rate : 44.1 KHz x c$jG?83# Resolution : 16 bits Qh4Z{c@
Text #3 `w%Qs)2 ID : 3 $eh>.c'&] Format : ASS c nV2}U/\ Codec ID : S_TEXT/ASS $(pVE}J Codec ID/Info : Advanced Sub Station Alpha $`Aps7A Text #4 Bet?]4\_ ID : 4
lmB+S Format : ASS 2sT\+C&H Codec ID : S_TEXT/ASS @5TJ]= Codec ID/Info : Advanced Sub Station Alpha lkgB,cflpi <VmEXJIk ============================================= fb|lWEw5h. DgC;1U' 《GPX》 UjS,<>fm General `HsI)RmX Complete name : F:\Video\1992.新世紀GPX.高智能一級方程式Ⅱ-DoubleOne\02_.mkv stlkt>9 Format : Matroska Tw9?U,] File size : 320 MiB Q E*`#r#e Duration : 26mn 54s CrEC@5j Overall bit rate : 1 663 Kbps hdxq@%Vs Encoded date : UTC 2011-05-16 14:48:07 6Y}
Bza Writing application : mkvmerge v4.3.0 ('Escape from the Island') 编译于 Sep 5 2010 10:30:51 <z-+{-?z~ Writing library : libebml v1.0.0 + libmatroska v1.0.0 >6
6v+ Video #1 6zW3!_tz ID : 1 R"[U<
^ Format : AVC Z`kI6 Format/Info : Advanced Video Codec 0I[3%Q { Format profile : [url=mailto:High@L4.0]High@L4.0[/url] lNqF@eCT9 Format settings, CABAC : Yes O.
OSLezTQ Format settings, ReFrames : 2 frames
:O{
ZZ Muxing mode : Container profile=Unknown@4.0 z4*`K4W Codec ID : V_MPEG4/ISO/AVC &13#/ Duration : 26mn 52s n
Sh}1Arp/ Width : 640 pixels X?q,m4+ Height : 480 pixels /}RW~ax Display aspect ratio : 4:3 5KwT(R o Frame rate : 23.976 fps kV+O|9 Original frame rate : 11.988 fps r
WPoR/M Resolution : 24 bits _0qp!-l
} Colorimetry : 4:2:0 _tpqo> Scan type : Progressive <>^otb,e$ Writing library : x264 core 38 svn-341 "A,-/~cBV Audio #2 <LA!L
ID : 2 S%k](\7! Format : AAC B&c*KaK;~ Format/Info : Advanced Audio Codec \*6Ld%:h$ Format version : Version 4 {/SLDyf%Z Format profile : LC RS[>7-9 Format settings, SBR : Yes e2$k
%c~ Format settings, PS : No TClgywL Codec ID : A_AAC K
cNh3CR Duration : 26mn 54s fs
wQ* Channel(s) : 2 channels ;]xJC
j Channel positions : L R )
v^;"q" Sampling rate : 44.1 KHz \*k}RKDwT Resolution : 16 bits nRlvW{p; Video delay : -83ms k874t D Title : Cantonese粵語 q\a'pp9d Language : Chinese t^-yK;`?q: Audio #3
"] 0sR ID : 3 0x]WW|se* Format : AAC 3,RaM^5dV Format/Info : Advanced Audio Codec p8a\> { Format version : Version 4 %>Y86>mVz Format profile : LC RkuPMs
Hw; Format settings, SBR : Yes MC&sM-/ Format settings, PS : No O+Q t8, Codec ID : A_AAC tW|K\NL Duration : 26mn 54s 9>na3ISh Channel(s) : 2 channels +Pm
yFJH Channel positions : L R s j{i Sampling rate : 44.1 KHz pv #uLo Resolution : 16 bits yDW$v/j.| Video delay : -83ms {(MC]]'? Title : 日語 8rx"D`{| Language : Japanese OfSHZ;, L+o"<LV]
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