[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。 ApeqbD5g& 8.B'O>
\T 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。 Mww
^ 所以,要點樣壓縮到好似前者一樣? %o%V4K* rV%T+!n%c 唔改變解像度,只改變碼率,應如何做? <N= k&\ w
!20 SKH}!Id}n 《死神》 ct3i^,i General /Pg)7Zn Complete name : F:\Video\[jumpcn][BLEACH][320][1280x720].mkv 5 qfvHQ ~M Format : Matroska fAULuF File size : 280 MiB J.1c,@ Duration : 24mn 7s _
l`F}v Overall bit rate : 1 621 Kbps N3L$"g5^ Encoded date : UTC 2011-05-03 17:33:29 f
1_; da Writing application : mkvmerge v2.9.9 ('Tutu') built on Nov 25 2009 21:13:32 (WT\HR Writing library : libebml v0.7.9 + libmatroska v0.8.1 ML12
&E> Video #1 ,IPt4EH
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ID : 1 uBbQJvL Format : AVC `nyz, Format/Info : Advanced Video Codec ;-u]@35 Format profile : [url=mailto:High@L4.0]High@L4.0[/url] oWY3dc Format settings, CABAC : Yes u;q
Q/Ftb Format settings, ReFrames : 8 frames ]vQa~} Muxing mode : Container profile=Unknown@4.0 Cb+sE"x] Codec ID : V_MPEG4/ISO/AVC 5<(*
+mP` Duration : 23mn 55s H2jypVs$2 Nominal bit rate : 1 500 Kbps W8 g13oAu" Width : 1 280 pixels 1Gr^,Ry Height : 720 pixels D=a*Xu2zq Display aspect ratio : 16:9 i\IpS@/{-v Frame rate : 23.810 fps h/\v+xiF Original frame rate : 23.976 fps n8EKTuy Resolution : 24 bits P[ o"%NZ' Colorimetry : 4:2:0 e2=}qE7 Scan type : Progressive [6VM4l" Bits/(Pixel*Frame) : 0.068 ^IiA(?8 Writing library : x264 core 98 r1629 2e81ce1 H,KH}25 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 |5;,]lbt Audio #2 k`>qb8, ID : 2 yam'LF Format : AAC BMAWjE
r Format/Info : Advanced Audio Codec 2f:h z Format version : Version 4 0i[t[_sce Format profile : LC 6'
*6tS Format settings, SBR : No JL_(%._J Codec ID : A_AAC K_U`T;Z\ Duration : 24mn 7s u*l>)_HD Channel(s) : 2 channels 1Mq"f7X8
Channel positions : L R ~jKIuO/ Sampling rate : 44.1 KHz 5Zc Resolution : 16 bits 7y& |