我写了一个简单的脚本:
#!/bin/bash
find . -name "*.m4a" | while read filename;
do
new_filename=$(echo "$filename" | sed "s/^\(.*\)m4a$/\1flac/g");
if [ ! -f "$new_filename" ]
then
#ffmpeg -i "$filename" -acodec flac "$new_filename" > /dev/null 2>&1;
#wait $!;
echo "$filename";
echo "$new_filename";
fi
done
它输出正确的结果:
./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/04 - Met.m4a
./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/04 - Met.flac
./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/02 - Nach Dem Winter.m4a
./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/02 - Nach Dem Winter.flac
如果取消注释 ffmpeg 并等待:
./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/04 - Met.m4a
./Equilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/04 - Met.flac
uilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/02 - Nach Dem Winter.m4a
uilibrium, ALAC [GER] viking.folk/2003 - Demo 2003, ALAC/02 - Nach Dem Winter.flac
并且还没有完成任何flac!
PS
#!/bin/bash
find . -name "*.m4a" | while read filename;
do
new_filename=$(echo "$filename" | sed "s/^\(.*\)m4a$/\1flac/g");
if [ ! -f "$new_filename" ]
then
ffmpeg -i "$filename" -acodec flac "$new_filename";
echo "$filename";
echo "$new_filename";
fi
sleep 5;
done
1) 编码启动但突然停止且没有错误消息
2) 编码无法启动,因为“uilibrium”而不是“./Equilibrium”
3) = 1)
4) = 2)
...
最后)正确