How to call ffmpeg in php
上传好视频后,PHP后台自动选取视频流中的某一帧作为视频封面。
FFmpeg是一套可以用来记录、转换数字音频、视频,并能将其转化为流的开源计算机程序,功能很强大。(推荐学习:PHP编程从入门到精通)
下载FFmpeg(for Windows):http://ffmpeg.zeranoe.com/builds/ (其他版本可上官网上搜:http://ffmpeg.org/),我下的是shared版的,static版本的下载不下来,下载时一直中断。因此不知道两个版本具体差别。
解压,将bin文件夹下的所有文件包括.exe和.dll都拷贝到C:\Windows\System32中。
在php文件中调用system()或exec()方法来实现帧图像的提取。(注意:在php中路径字符串中‘\’需转义:“\\”)
测试用例:
$name = md5(date('YmdHis')).".png"; $from = "E:\\UPLOAD\\cw\\20150626\\558d0d11ae285.mp4"; $to = "E:\\UPLOAD\\cover_images\\"; $str = "ffmpeg -i ".$from." -y -f mjpeg -ss 3 -t 1 -s 740x500 ".$to.$name; system($str);
或
$name = md5(date('YmdHis')).".png"; $from = "E:\\UPLOAD\\cw\\20150626\\558d0d11ae285.mp4"; $to = "E:\\UPLOAD\\cover_images\\"; $str = "ffmpeg -i ".$from." -y -f mjpeg -ss 3 -t 1 -s 740x500 ".$to.$name; exec($str);
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