ffmpeg 轉檔

AVI to FLV
$ ffmpeg -i xxx.AVI -ar 22050 -ab 32 -f flv -s 320x256 xxx.flv

AVI to MP4
$ ffmpeg -i xxx.AVI -b 300 -s 320x240 -vcodec xvid -ab 32 -ar 24000 -acodec aac xxx.mp4

AVI to PAL-VCD
$ ffmpeg -i xxx.AVI -target pal-vcd xxx.MPEG

AVI to NTSC-VCD

$ ffmpeg -i xxx.AVI -target ntsc-vcd xxx.MPEG