转换rmvb成PSP能播放的MP4的脚本

#!/bin/bash

# Install mencoder & gpac first

# sudo apt-get install mencoder gpac



# Movie file extension definition

extension="rmvb"



for movie in $(ls *.${extension})

do

    movie=${movie%.*}



    if [ -f "${movie}.mp4" ]; then

        echo "$movie.$extension has been converted, ignore..."

    else

        echo "convert $movie.$extension to mp4..."

        

        mencoder "$movie.$extension" -sws 9 -af volnorm -srate 48000 -vf-add scale=362:272,harddup -ofps 24000/1001 -oac faac -faacopts br=96:mpeg=4:object=2 -ovc x264 -ffourcc H264 -x264encopts crf=22:level_idc=21:bframes=3:frameref=2:nopsnr:nossim -o "${movie}.temp.avi" >& /dev/null

    

        mencoder -ovc copy -nosound -of rawvideo -o "${movie}.temp.264" "${movie}.temp.avi"

        mencoder -ovc frameno -oac copy -of rawaudio -o "${movie}.temp.aac" "${movie}.temp.avi"

        MP4Box -fps 23.976 -add "${movie}.temp.264"#video -add "${movie}.temp.aac"#audio -new "${movie}.mp4"

    

        rm -f "${movie}.temp.avi"

        rm -f "${movie}.temp.264"

        rm -f "${movie}.temp.aac"

    fi

done 

 从这个脚本可以看到，直接使用mencoder生成MP4是有问题的，因为mencoder对MP4的封装有问题，PSP无法识别，所以后来要用MP4Box重新封装MP4文件。