使用Mplayer 的mencoder 转换视频 for my psp

mencoder -oac lavc -ovc lavc -of lavf -lavcopts aglobal=1:vglobal=1:vcodec=mpeg4:acodec=aac 
-af lavcresample=24000 -vf harddup -lavfopts 
format=psp:i_certify_that_my_video_stream_does_not_use_b_frames 
-ofps 30000/1001

 http://www.mplayerhq.hu/DOCS/HTML/zh_CN/menc-feat-handheld-psp.html

mencoder -ofps 30000/1001 -af lavcresample=24000 -vf harddup -of lavf /
    -oac lavc -ovc lavc -lavcopts aglobal=1:vglobal=1:vcodec=mpeg4:acodec=aac /
    -lavfopts format=psp:i_certify_that_my_video_stream_does_not_use_b_frames /
    input.video -o output.psp