随笔-ffmpeg ffplay

linux下播放alaw文件：

xfile=poweroff.alaw ;timeout 5 ffplay -i $xfile -f alaw -ac 1 -ar 8000
for xfile in $(ls *.alaw);do sleep 1s; echo $xfile;timeout 5 ffplay -i $xfile -f alaw -ac 1 -ar 8000; done

ffmpeg -i not-during-worktime.mp3 -ar 16000 -acodec g722 1.g722