FFMPEG- 如何对视频按时长切片与压缩

                        type = "int",                        action = "store"                        )    parser.add_option("-o", "--file-list",                        dest = "file_list",                        help = "output file_list",                        type = "string",                        action = "store"                        )    (options, args) = parser.parse_args()        if options.filename and options.split_size and options.file_list:         return (options.filename, options.split_size, options.file_list)     else:        parser.print_help()        raise SystemExit if __name__ == '__main__':     try:         main()    except Exception, e:        print "Exception occured running main():"        print str(e)
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三 压缩

/usr/local/ffmpeg/bin/ffmpeg -i "2.4_mission.mp4" -vcodec libx264 -s 1920X1080 -vf "movie=stark.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:10 [out]" -acodec copy "2.4_1080P.mp4"

压缩效果还不错，99m 的原文件，压缩后画质未变的情况下，体积变成 14m。

参考文献：

http://icephoenix.us/notes-for-myself/auto-splitting-video-file-in-equal-chunks-with-ffmpeg-and-python/

http://blog.itpub.net/29754888/viewspace-1383562/
http://blog.csdn.net/dotphoenix/article/details/9714773