PHP+FFMPEG realizes automatic transcoding of videos into H264 standard Mp4 files

PHP+FFMPEG realizes automatic transcoding of videos into H264 standard Mp4 files,

Configure the php.ini file

file_uploads = on ;//是否允许通过HTTP上传文件的开关。默认为ON即是开
upload_tmp_dir ;//文件上传至服务器上存储临时文件的地方，如果没指定就会用系统默认的临时文件夹
upload_max_filesize = 1024m ;//望文生意，即允许上传文件大小的最大值。默认为2M,我们设置为1G
post_max_size = 1024m ;//指通过表单POST给PHP的所能接收的最大值，我们也设置为1G

max_execution_time = 3600 ;//每个PHP页面运行的最大时间值(秒)，默认30秒，设置为一小时，因为后面转码时间很久。
max_input_time = 36000 ;//每个PHP页面接收数据所需的最大时间，默认60秒
memory_limit = 8m ;//每个PHP页面所吃掉的最大内存，默认8M

File upload plug-in

Flame Rain recommends that you use uploadify. Uploadify is an upload plug-in for JQuery that implements progress display. The plug-in installation is simple and can be skipped here.
But there is a problem that needs to be paid attention to. The session will be lost in non-IE browsers. After checking a lot of information, the final reason is:

Because uploadify uses a flash client, and the useragent it generates is different from The user-agent of the browser is different.

Final solution:

//在upmodify上传参数中加入session参数，如下：
scriptData: {"SESSION_ID":""},
// 在服务端接收页面加入以下代码：
if(@$_REQUEST['SESSION_ID'] && ($session_id=$_REQUEST['SESSION_ID']) !=session_id()){
session_destroy();
session_id($session_id);
@session_start(); 
}

This solves the problem that FLASH cannot transmit the page correctly

Video format conversion

Now compare under Linux The popular video format conversion software is FFMPEG. FFMPEG is a complete solution for recording, screenshots, converting and streaming audio and video. It is a leading audio/video codec library. In addition to FFMPEG, we need to transcode to H264 format and need an extension. (All software package download addresses are given at the end of the article)

Install the source code to install the h264 extension in centos 5.4 environment

tar -xjvf x264-snapshot-20120718-2245-stable.tar.bz2 
#进入解压后的源文件目录 
cd x264-snapshot-20120718-2245-stable/ 
./configure --prefix=/usr/local --enable-shared 
make
make install

//centos 5.4环境下安装源码安装ffmpeg with h264扩展
tar -xjvf ffmpeg-2.1.1.tar.bz2
//进入解压后目录 
cd ffmpeg-2.1.1
./configure --enable-gpl --enable-libx264
make
make install
//重新加载配置
lcfonfig 
//测试是否安装成功
ffmpeg

If you see the following content, the installation is successful:

ffmpeg version 2.1.1 Copyright (c) 2000-2013 the FFmpeg developers
built on Dec 17 2013 23:32:40 with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-3)
configuration: --enable-libx264 --enable-gpl
libavutil 52. 48.101 / 52. 48.101
libavcodec 55. 39.101 / 55. 39.101
libavformat 55. 19.104 / 55. 19.104
libavdevice 55. 5.100 / 55. 5.100
libavfilter 3. 90.100 / 3. 90.100
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
Use -h to get full help or, even better, run 'man ffmpeg'

php calls ffmpeg to transcode video

$cmd = 'FFMPEG -i uploadfile/video/test.wmv -c:v libx264 -strict -2 uploadfile/mp4/test.mp4';
exec($cmd, $status);

Please make sure the exec function is turned on before running. Otherwise, please modify the php.ini file

Finally attach FFMPEG+H264 extension +YASM+apache_mod_h264

Related articles:

PHP converts video to MP4 and How to get the video preview

How to convert the video to mp4 format using memcoder in php

php downloads the flv file or the mp4 file cannot be played