Linux Shell

循环

根据文件列表循环

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for i in *.wmv; do ffmpeg -i "$i" "${i%.*}.mp4"; done

根据文本行循环

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while read p; do
  echo "$p"
done < test.txt

或

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cat peptides.txt | while read line 
do
   # do something with $line here
done

示例

定时转换当天新增视频

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#!/bin/bash
# test.sh

mypidfile=/var/run/wmv_to_mp4.sh.pid

# Add check for existence of mypidfile 
if [ -f $mypidfile ]; then
    echo "script is already running"
    exit
fi


# Ensure PID file is removed on program exit.
trap "rm -f -- '$mypidfile'" EXIT

# Create a file with current PID to indicate that process is running.
echo $$ > "$mypidfile"

cd $(date +%Y%m%d)

for i in *.wmv;
do
 if (( $(date '+%s') > $(( $(date -r $i '+%s') + 600 )) )); then
   ffmpeg -y -i "$i" "${i%.*}.mp4"
   mkdir wmv
   mv "$i" "wmv/${i}"
 fi
done

References