office文档、图片、音/视频格式转换工具

 1、音频/视屏转换工具VLC

• https://wiki.videolan.org/Mp3/#Container_formats 
• http://wenku.baidu.com/view/ba73ac5c804d2b160b4ec05a.html?re=view
• https://wiki.videolan.org/How_to_Batch_Encode/
• https://wiki.videolan.org/Transcode/

VLC supported video format to MP4 (H.264)

In MacOS

$ vlc -I dummy -q i.flv --sout='#transcode{vcodec=h264, acodec=mp4a, aenc=ffmpeg{strict=-2}}:std{access=file, mux=mp4,dst=o.mp4}' vlc://quit

In Windows

vlc -I dummy -q -vvv a.avi --sout=#transcode{vcodec=h264,acodec=mp4a,aenc=ffmpeg{strict=-2}}:standard{access=file,mux=mp4,dst=b.mp4} vlc://quit

VLC supported audio format to MP3

In MacOS

$ vlc -I dummy -q i.wav --sout='#transcode{acodec=mp3}:std{access=file,mux=raw,dst=o.mp3}' vlc://quit

In Windows

vlc -I dummy -q -vvv a.wav --sout=#transcode{acodec=mp3}:standard{access=file,mux=raw,dst=b.mp3} vlc://quit

2、  文档转换：OfficeToPDF

• http://officetopdf.codeplex.com/documentation

    officetopdf.exe %1 %2 /bookmarks /readonly /print /markup /pdfa 

3、图片转换：ImageMagick  

• http://www.imagemagick.org/script/convert.php

    convert -auto-orient input.jpg output.png 

PS：VLC和OfficeToPDF须要配置环境变量PATH。代码都写到bat文件里，然后再C#程序中直接调用。