多媒体

安装swf解码器

sudo apt-get install swfmill

mplayer -dumpfile dump.rm -dumpstream rstp://....

#ipod touch可用
for i in *.rmvb; do mencoder -vf harddup -oac mp3lame -lameopts vbr=3 -ovc xvid -xvidencopts fixed_quant=4 -of avi $i -o `echo $i | sed -e 's/rmvb$/avi/'`; done

for i in *.VOB; do mencoder -oac mp3lame -lameopts aq=7:vbr=2:q=6 -srate 44100 -ovc xvid -xvidencopts fixed_quant=4 -of avi $i -o `echo $i | sed -e 's/VOB$/avi/'`; done

#sudo apt-get install ffmpeg2theora   
#firefox3.5或chrome直接支持播放，无需安装任何解码器，注意不支持rmvb，rmvb会出现a/v不同步问题
for i in *; do ffmpeg2theora --optimize --deinterlace $i; done

    #!/bin/bash
for i in *; do
   mkfifo "/tmp/$i"
   mencoder -quiet -vf harddup -ovc raw -oac pcm -o "/tmp/$i" "$i" &
   ffmpeg2theora --optimize --deinterlace "/tmp/$i" -o "`echo $i | sed 's/\(.*\)\..*$/\1/'`.ogv"
   rm "/tmp/$i"
   done

    #!/bin/bash
for i in *; do
   gst-launch-0.10 filesrc location="$i" ! decodebin name=demux \
   { oggmux name=mux ! filesink location="`echo $i | sed 's/\(.*\)\..*$/\1/'`.ogv" } \
   { demux. ! queue ! audioconvert ! vorbisenc ! queue ! mux. } \
   { demux. ! queue ! ffmpegcolorspace ! videorate ! theoraenc ! mux. } 
done   

#!/bin/bash
#ubuntu10.04自带的mencoder由于版权问题，不支持h264编码，需要重新编译；也可以直接参考下面的压缩方法。
#sudo apt-get install mencoder mplayer
find . -name '*.avi' -o -name '*.rm' -o -name '*.rmvb' -o -name '*.wmv' -o \
      -name '*.vob' -o -name '*.asf' -o -name '*.mpg' -o -name '*.ts' -o \
      -name '*.flv' -o -name '*.mpeg' -o -name '*.ogv' -o -name '*.mov' -o \
      -name '*.mkv' -o -name '*.dat' | while read i; do
  basename=`echo $i | sed 's/\(.*\)\..*$/\1/'`
  font="WenQuanYi Zen Hei"

  if [ -f "${basename}.srt" ] ; then
     cp "${basename}.srt" $$.srt
     m0="-vf scale=480:-10,harddup -sub $$.srt -unicode -subcp GB18030 -subfont-text-scale 3"; 
  else
     m0="-vf scale=480:-10,harddup"; 
  fi
 
  x0="-lavfopts format=mp4 -faacopts mpeg=4:object=2:raw:br=160 -oac faac -ovc x264 -sws 9 -x264encopts nocabac:level_idc=30:bframes=0:global_header:threads=auto:subq=5:frameref=6:partitions=all:trellis=1:chroma_me:me=umh:bitrate=500 -of lavf -ofps 24000/1001";
  mencoder $m0 -fontconfig -font "${font}" $x0 -o "$$.mp4" "$i"
  mv "$$.mp4" "${basename}.mp4"
  if [ -f "${basename}.mp4" ] ; then
     rm "$i"
  fi
done    

#!/bin/bash
#sudo apt-get install faac x264 gpac mplayer mencoder
basename=`echo $1 | sed 's/\(.*\)\..*$/\1/'`
#获得视频的长宽和帧数
mplayer -vo null -ao null -identify -frames 0 "$1" 2>/dev/null > video.info
FPS=`cat video.info | grep ID_VIDEO_FPS | cut -d = -f 2`
#FPS=23.976
W=`cat video.info | grep ID_VIDEO_WIDTH | cut -d = -f 2`
H=`cat video.info | grep ID_VIDEO_HEIGHT | cut -d = -f 2`
WIDTH=480
HEIGHT=`expr $WIDTH \* $H \/ $W`
echo $1 FPS=$FPS WIDTH=$WIDTH HEIGHT=$HEIGHT
mkfifo audio.wav video.yuv
faac -o audio.aac audio.wav &
mplayer -ao pcm:file=audio.wav:fast -vc null -vo null "$1" 
x264 --profile baseline --fps $FPS -o video.264 video.yuv ${WIDTH}x${HEIGHT} &
mencoder -vf scale=$WIDTH:$HEIGHT,harddup,pp=fd,format=i420 -nosound -ovc raw -of rawvideo -ofps $FPS -o video.yuv "$1"
MP4Box -new -add video.264 -add audio.aac -fps $FPS "$basename.mp4"
rm video.info audio.aac video.264 audio.wav video.yuv
#使用方法将上面的脚本保存为 x264.sh , x264.sh xxx.avi 来进行转化。

mencoder -ovc lavc 1.rm -oac mp3lame -o 1.avi
mencoder -ovc lavc 2.rm -oac mp3lame -o 2.avi
mencoder -idx 1.avi -ovc copy -oac copy -o o1.avi
mencoder -idx 2.avi -ovc copy -oac copy -o o2.avi
cat o1.avi o2.avi | mencoder -noidx -ovc copy -oac copy -o output.avi -    

mencoder -ovc copy -oac copy -idx  -o 目标文件名 文件名1 文件名2

mplayer -vo null -ao null -frames 0 -identify "xxx.avi" 2>/dev/null | sed -ne '/^ID_/ { s/[]()|&;<>`'"'"'\\!$" []/\\&/g;p }'

#sudo apt-get install mkvtoolnix
mkvinfo -v xxx.mkv

rm ~/.recently-used

#sudo apt-get install abcde
abcde -o mp3 -b

#sudo apt-get install abcde
abcde -o flac -b

#sudo apt-get install flac shntool iconv mac
iconv -f GB2312 -t UTF-8 example.cue -o example_UTF-8.cue
shntool split -t "%n.%p-%t" -f example_UTF-8.cue -o flac example.ape -d flacOutputDir

#sudo apt-get install flac shntool lame 
#ape 需要安装  monkeys 包
iconv -f GB2312 -t UTF-8 example.cue -o example_UTF-8.cue
shntool split -t "%n.%p-%t" -f example_UTF-8.cue -o 'cust ext=mp3 lame --r3mix -b 320 --quiet - %f' example.ape -d mp3OutputDir

for f in *.ape; do gst-launch-0.10 filesrc location="$f" ! decodebin ! audioconvert ! lame vbr=0 bitrate=320 ! id3mux ! filesink location="${f%.ape}.mp3"; done
#需要安装 shntool
for i in *.ape; do shnconv -i ape -o "cust ext=mp3 lame -b 320 - %f" "$i" -d mp3OutputDir; done

for f in *.ape; do ffmpeg -i  "$f" -acodec alac "${f%.ape}.m4a"; done

for f in *.ape; do ffmpeg -i  "$f" -acodec aac -strict experimental -ab 256k "${f%.ape}.aac"; done

for i in *.flac; do shnconv -i flac -o "cust ext=mp3 lame -b 320 - %f" "$i" -d mp3OutputDir; done

for i in *.svg; do inkscape $i --export-png=`echo $i | sed -e 's/svg$/png/'`; done

    #sudo apt-get install lame mplayer
for i in *; do base=${i%.*}; mplayer -quiet -vo null -vc dummy -af volume=0,resample=44100:0:1 -ao pcm:waveheader:file

for i in *.jpg; do convert -resize 30%x30% "$i" "sm-$i"; done

for i in *.jpg; do convert $i `echo $i | sed -e 's/jpg$/png/'`; done

convert -size 200x30 xc:transparent -font /usr/share/fonts/truetype/wqy/wqy-microhei.ttc -fill red -pointsize 16 -draw "text 5,15 '测试中文转为图片'" test.png

#sudo apt-get install optipng
optipng -o7 old.png new.png
#或 sudo apt-get install pngcrush
#pngcrush -brute old.png new.png

convert *.jpg out.pdf

sudo apt-get install poppler-utils poppler-data
find ./ -name '*.txt' | while read i; do cat $i | awk '{if ($0 ~ "^space:”) {printf “\n”$0} else {printf $0}}’ | sed ‘/^space:*digit:*$/d’ | sed ’s/^space:\+/    /’ | sed ’s/＂/”/g’ > “../txt/$i”; done

#sudo apt-get install imagemagick
convert -density 196 FILENAME.pdf  FILENAME.png

identify -verbose xxx.jpg

ffmpeg -f x11grab -s wxga -r 25 -i :0.0 -sameq /tmp/out.mpg

可以使用espeak在控制命令行中朗读一段文本。

espeak -vzh "从前有座山"

scrot -s screenshot.png

gnome-screenshot -d 10 #延迟10秒抓图
gnome-screenshot -w -d 5 #延迟5秒抓当前激活窗口