下载M3U8文件视频命令行

#!/bin/bash  

#by pw 2017/03/07  

#检测参数  
if [[ $# != 2 && $# != 1 ]] ; then   
echo "USAGE: $0 url(m3u8网络路径,支持一级嵌套但不支持多码率) tsnum(切片个数，不指定时全部下载)"   
exit 1;   
fi   
  
#检测m3u8 
input_m3u8=$1 
 if !(echo "$input_m3u8" | grep "m3u8" >/dev/null) ; then
echo "invalid m3u8!"
exit 1;
fi

main_m3u8=${input_m3u8##*/}
prefix=${input_m3u8%/*}
fold=${main_m3u8%.*}
mkdir -p $fold

#主m3u8下载
echo "downloading $main_m3u8" 
wget -q $input_m3u8  -O $fold/$main_m3u8
if !([ -s $fold/$main_m3u8 ]) ;then
echo "main m3u8 download failed"
rm -f $fold/$main_m3u8
rmdir $fold
exit 1;
fi

#子m3u8下载
if  cat $fold/$main_m3u8 | grep 'm3u8' >/dev/null ;then
    sub_m3u8=$(cat $fold/$main_m3u8 | grep 'm3u8')
     echo "downloading $sub_m3u8"
     wget -q $prefix/$sub_m3u8 -O $fold/$sub_m3u8
    if !([ -s $fold/$sub_m3u8 ]) ;then
    echo "sub m3u8 download failed"
    rm -f $fold/$main_m3u8
    rm -f $fold/$sub_m3u8
    rmdir $fold
    exit 1;
    fi
     down_m3u8=$fold/$sub_m3u8
     else
     down_m3u8=$fold/$main_m3u8
fi
 
#rm -fr $fold/*.ts
#切片下载
tsnum=$2

if [[ $tsnum -ge 1 ]] ;then

for ts in $(cat $down_m3u8 |grep 'ts'|head -n $tsnum)  
do   
     echo "downloading $ts" 
     wget -q $prefix/$ts -O $fold/$ts;    
done

else

for ts in $(cat $down_m3u8 |grep 'ts')  
do   
     echo "downloading $ts" 
     wget -q $prefix/$ts -O $fold/$ts;    
done
fi  
echo "Done"