新增videolen.sh：调用ffprobe统计多个视频的总时长...

videolen.sh

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+#!/usr/bin/env bash
+#调用ffprobe统计多个视频的总时长...
+
+#借助awk进行浮点数比较
+#See Also：https://stackoverflow.com/questions/8654051/how-can-i-compare-two-floating-point-numbers-in-bash
+_numCompare() {
+    if awk "BEGIN {exit !($1 == $2)}"; then
+        return 0 #二者相等
+    elif awk "BEGIN {exit !($1 > $2)}";then
+        return 1 #前者比后者大
+    else
+        return 2 #前者比后者小
+    fi
+}
+
+videolen() {
+	#递归调用videolen，适配多文件的情况,eg：videolen *.mp4	
+	_print_help() {
+		echo -e "videolen：\n\t调用 ffprobe 查看和计算单个或多个视频的时长（支持通配符*指定某个文件类型）；\n"
+		echo -e "Usage:"
+		echo -e "\tvideolen file1 [file2 file3 ...]\n"
+		echo -e "Example:"
+		echo -e "\tvideolen hello.mp4"
+		echo -e "\tvideolen 1.mp4 2.mp4 3.mp4 4.mp4"
+		echo -e "\tvideolen *.mp4"
+	}
+	if [ $# -eq 0 ]||[[ "$*" == "-h" || "$*" == "--help" ]];
+	then
+		_print_help && return
+	elif [ $# -eq 1 ];
+	then
+		printf "时长（秒）："
+		IFS=$(echo -e "\n") /v/bin/videolen "$1"|dos2unix -q
+		return
+	fi
+	OLD_IFS=$IFS
+	IFS=$(echo -e "\n") 
+	local totalTime=0
+	local Hours
+	local Mintues
+	local Seconds
+	for file in $@
+	do
+		#echo -e "$file\t\c"
+		#/v/bin/videolen "$file"
+		local vTime=$(/v/bin/videolen "$file"|dos2unix -q)
+		totalTime=$(echo "${totalTime}+${vTime}"|dos2unix|bc)
+		echo -e "$vTime <= $file"
+	done
+
+	_numCompare "$totalTime" 3600
+	local HoursFlag=$?
+	_numCompare "$totalTime" 60
+	local MintuesFlag=$?
+
+	if [ $HoursFlag -le 1 ];then  #时长大于1小时的情况
+		Hours=$(echo "$totalTime/3600"|bc)
+		#echo -e "小时数：$Hours"
+		Mintues=$(echo "($totalTime-3600*$Hours)/60"|bc)
+		#echo -e "分钟数：$Mintues"
+		Seconds=$(echo "$totalTime%60"|bc)
+		#echo -e "秒数：$Seconds"
+	elif [ $MintuesFlag -le 1 ];then  #时长大于1分钟的情况
+		Mintues=$(echo "$totalTime/60"|bc)
+		#echo -e "分钟数：$Mintues"
+		Seconds=$(echo "$totalTime%60"|bc)
+		#echo -e "秒数：$Seconds"
+	fi
+	echo "====================================================="
+	echo "总时间：$totalTime 秒"
+	if [ ! -z "$Mintues" ];then
+		printf "合计："
+		[ ! -z "$Hours" ] && printf "%s 小时 " $Hours
+		[ ! -z "$Mintues" ] && printf "%s 分钟 " $Mintues
+		[ ! -z "$Seconds" ] && printf "%s 秒 " $Seconds
+		printf "\n"
+	fi
+	IFS=$OLD_IFS
+}