下载 mplayer/mencoder，以及其他相关的 codes
man page 这个可以详细查找
guide
encoding tip
使用帮助
mencoder -ovc helpmencoder -oac help
mencoder -of help (output format)
mencoder -vf help (video filter)
mencoder -vf help
列出 video filters 的名称
比如使用 format 这个滤波器
mencoder -vf format=help
列出 format 的参数 可以知道 format 有一个参数为 fmt
除了参数名，还会给出参数类型，和取值范围
mencoder -vf format=fmt=help
列出 fmt 参数的可选项
对于多个参数，多个滤波器
-vf Setup a chain of video filters.
Mencoder 命令格式
mencoder.exe
-ovc x264 -x264encopts crf=20
[-vf rotate=0]
-oac mp3lame -lameopts vbr=3:br=96
-of avi
AVSEQ08.DAT -o AVSEQ08.avi
-ovc 视频编码器，x264encopts 说明后面接的是 x264 的参数，多个参数之间用':'隔开
ovc
常用的为 x264
x264encopts 有很多项，傻瓜式用法有两种
设置 crf，好一点设为 20，差一点设为 24
设置 bitrate，并使用 2 passes
crf 例：
mencoder -ovc x264 -x264encopts crf=20 -oac mp3lame -lameopts vbr=3:br=96 -of avi AVSEQ08.DAT -o AVSEQ08.avi
2 passes 例：
使用 2passes，要编码两次，两条命令，第一pass时，音频可以选择 copy，第二pass才编音频
mencoder -ovc x264 -x264encopts bitrate=384:pass=1 -oac copy -of avi AVSEQ08.DAT -o AVSEQ08.avi
mencoder -ovc x264 -x264encopts bitrate=384:pass=2 -oac mp3lame -lameopts vbr=3:br=96 -of avi AVSEQ08.DAT -o AVSEQ08.avi
oac
常用 mp3lame 以及 faac，后者需要一个 dllmp3lame
-lameopts
vbr 参数：
0 cbr
1 mt
2 rh (default)
3 abr
4 mtrh
一般可以选择 vbr=3:br=128
of
目前 -of lavf 的muxer还存在问题，所以请选择 avi。 avi 也可以封装 264vf: 编码或播放时的视频处理
格式为-vf filter=parameter1:parameter2
使用 vf，例如播放时旋转
mplayer -vf rotate=0 IMG_0744.MOV
编码时旋转
mencoder -ovc x264 -x264encopts bitrate=3000 -vf rotate=0 -oac faac -of lavf -lavfopts format=mp4 IMG_0744.MOV -o test2.mp4
编码时缩放
mencoder -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1000 -vf scale=320:240 -oac mp3lame -of avi IMG_0744.MOV -o test.avi
需要多个滤波器，使用',' 链接
-vf <filter1[=parameter1:parameter2:...],filter2,...>
比如 -vf rotate=0,scale=320:240
例子
d:\Software\MPlayer-p4-svn-34401\mencoder.exe -ovc x264 -x264encopts crf=20 -oac mp3lame -lameopts vbr=3:br=96 -of avi AVSEQ08.DAT -o AVSEQ08.avi
d:\Software\MPlayer-p4-svn-34401\mencoder.exe -ovc x264 -x264encopts bitrate=384:pass=1 -oac copy -of avi AVSEQ08.DAT -o AVSEQ08.avi
d:\Software\MPlayer-p4-svn-34401\mencoder.exe -ovc x264 -x264encopts bitrate=384:pass=2 -oac mp3lame -lameopts vbr=3:br=96 -of avi AVSEQ08.DAT -o AVSEQ08.avi
Example 1: 将多个名字顺序排列的png图片连成视频
mencoder.exe mf://*.png -mf type=png:fps=25 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=2000 -o out3.avi
注意
| Specify bitrate (default: 800). WARNING: 1kbit = 1000 bits |
| 4−16000 |
| (in kbit) |
| 16001−24000000 |
| (in bit) |
Example 2: raw video 将yuv4mpeg 格式的视频转化为 i420 的raw
mencoder -ovc raw -vf format=i420 -of rawvideo stefan_sif.y4m -o stefan_sif.yuv
Example 3: x264
mencoder -ovc x264 -x264encopts bitrate=192 -of lavf -lavfopts format=mp4 -o foreman.mp4 foreman_qcif.y4m
在 man page 中查找 -x264encopts，知道更多选项
Example: 利用 mencoder 提取音频
mencoder Recording.mpg -oac mp3lame -ovc frameno -o tmp.avi mplayer tmp.avi -dumpaudio -dumpfile audio.mp3
muxing 视频和音频，假设音频已经处理并编码好了
mencoder -ovc x264 -x264encopts crf=20 -oac copy -mc 0 -noskip -audiofile fj.mp3 -of avi fj.mpg -o fj.avi
见该技巧更多讨论。
mencoder -ovc copy -oac copy -mc 0 -noskip -audiofile trailer-audio.mp3 -audio-demuxer 20 -rawaudio format=0x2000:bitrate=448000:channels=6:rate=48000 -o sometest.avi xvid.avi I'll explain better what is going on: mplayer has a native mp3/mp2/mp1 demuxer that automatically identifies the properties of these streams and assigns bitrate, channels and samplerate accordingly; in order to demux ac3 mplayer relies on libavformat, that in this particular case does not assign those properties, so it has to be replaced with -demuxer 20 (rawaudio). Consequently, that command line is valid if the audiofile is ac3, but if (as the name implies) it is in mp3 format you either don't need -audio-demuxer 20 -rawaudio format=0x2000:bitrate=448000:channels=6:rate=48000 or you should replace it with the correct parameters for audio, in which case format=0x55. I assumed that you were trying to mux ac3 audio, and forgot that you also mentioned you attempted to mux mp3, that's why I only suggested to use format=0x2000, sorry.
参数
Available video codecs:copy - frame copy, without re-encoding. Doesn't work with filters.
frameno - special audio-only file for 3-pass encoding, see DOCS.
raw - uncompressed video. Use fourcc option to set format explicitly.
nuv - nuppel video
lavc - libavcodec codecs - best quality!
vfw - VfW DLLs, read DOCS/HTML/en/encoding-guide.html.
qtvideo - QuickTime DLLs, currently only SVQ1/3 are supported.
xvid - XviD encoding
x264 - H.264 encoding
选了某种视频编解码器后，相应的有 xxxopts 选项
比如 -ovc lavc -lavcopts ....
Available audio codecs:
copy - frame copy, without re-encoding (useful for AC3)
pcm - uncompressed PCM audio
mp3lame - cbr/abr/vbr MP3 using libmp3lame
lavc - FFmpeg audio encoder (MP2, AC3, ...)
twolame - Twolame MP2 audio encoder
faac - FAAC AAC audio encoder
Available output formats:
avi - Microsoft Audio/Video Interleaved
mpeg - MPEG-1/2 system stream format
lavf - FFmpeg libavformat muxers
rawvideo - (video only, one stream only) raw stream, no muxing
rawaudio - (audio only, one stream only) raw stream, no muxing
Available video filters:
rectangle : draw rectangle
crop : cropping
expand : expanding & osd
pp : postprocessing
scale : software scaling
vo : libvo wrapper
format : force output format
noformat : disallow one output format
yuy2 : fast YV12/Y422p -> YUY2 conversion
flip : flip image upside-down
rgb2bgr : fast 24/32bpp RGB<->BGR conversion
rotate : rotate
mirror : horizontal mirror
palette : 8bpp indexed (using palette) -> BGR 15/16/24/32 conversion
pp7 : postprocess 7
lavc : realtime mpeg1 encoding with libavcodec
lavcdeint : libavcodec's deinterlacing filter
screenshot : screenshot to file
dvbscale : calc Y scaling for DVB card
cropdetect : autodetect crop size
test : test pattern generator
noise : noise generator
yvu9 : fast YVU9->YV12 conversion
eq : soft video equalizer
eq2 : Software equalizer
halfpack : yuv planar 4:2:0 -> packed 4:2:2, half height
dint : drop interlaced frames
1bpp : 1bpp bitmap -> YUV/BGR 8/15/16/32 conversion
2xsai : 2xSai BGR bitmap 2x scaler
unsharp : unsharp mask & gaussian blur
swapuv : UV swapper
il : (de)interleave
fil : fast (de)interleaver
boxblur : box blur
sab : shape adaptive blur
smartblur : smart blur
perspective : perspective correcture
down3dright : convert stereo movie from top-bottom to left-right field
field : extract single field
denoise3d : 3D Denoiser (variable lowpass filter)
hqdn3d : High Quality 3D Denoiser
detc : de-telecine filter
telecine : telecine filter
tinterlace : temporal field interlacing
tfields : temporal field separation
ivtc : inverse telecine, take 2
ilpack : 4:2:0 planar -> 4:2:2 packed reinterlacer
dsize : reset displaysize/aspect
decimate : near-duplicate frame remover
softpulldown : mpeg2 soft 3:2 pulldown
pullup : pullup (from field sequence to frames)
filmdint : Advanced inverse telecine filer
framestep : Dump one every n / key frames
tile : Make a single image tiling x/y images
delogo : simple logo remover
remove-logo : Removes a tv logo based on a mask image.
hue : hue changer
spp : simple postprocess
uspp : ultra simple/slow postprocess
fspp : fast simple postprocess
qp : QP changer
mcdeint : motion compensating deinterlacer
geq : generic equation filter
yuvcsp : yuv colorspace converter
kerndeint : Kernel Deinterlacer
rgbtest : rgbtest
phase : phase shift fields
divtc : inverse telecine for deinterlaced video
harddup : resubmit duplicate frames for encoding
softskip : soft (post-filter) frame skipping for encoding
ass : Render ASS/SSA subtitles
yadif : Yet Another DeInterlacing Filter
blackframe : detects black frames
ow : overcomplete wavelet denoiser
fixpts : Fix presentation timestamps
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