linux 安装ffmpeg-php扩展,php通过安装ffmpeg-php扩展 来获取对视频信息操作
安装顺序：
1.ffmpeg
2.ffmpeg-devel
3.ffmpeg-php
安装ffmpeg ffmpeg-devel
操作系统：CentOS 6.2 minimal
由于默认的CentOS的软件仓库里没有FFmpeg、FFmpeg-PHP，所以安装第三方的软件仓库。
vim /etc/yum.repos.d/dag.repo
#输入：
[dag]
name=Dag RPM Repository for Red Hat Enterprise Linux
baseurl=http://apt.sw.be/redhat/el$releasever/en/$basearch/dag
gpgcheck=0
enabled=1
#gpgcheck 默认为0即可！设置gpgcheck=1会让yum检查每个下载的RPM的GnuPG签名。这么做是因为你需要适当的GnuPG key注册到您的RPM数据库。可以防止被欺骗.
#安装 Install ffmpeg 等模块
yum -y install ffmpeg ffmpeg-devel
#装好后通过命令查看是否成功
ffmpeg -formats
FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6)
configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
libavutil 50.15. 1 / 50.15. 1
libavcodec 52.72. 2 / 52.72. 2
libavformat 52.64. 2 / 52.64. 2
libavdevice 52. 2. 0 / 52. 2. 0
libavfilter 1.19. 0 / 1.19. 0
libswscale 0.11. 0 / 0.11. 0
libpostproc 51. 2. 0 / 51. 2. 0
安装ffmpeg-php
cd ffmpeg-php-0.6.1
/usr/local/php/bin/phpize #php路径一定要对
./configure --with-php-config=/usr/local/php/bin/php-config --with-ffmpeg=/usr
make && make install #make的时候报错见下面错误
报错：主要是“PIX_FMT_RGBA32”的错误
/usr/local/src/ffmpeg-php-0.6.1/ffmpeg_frame.c: In function ‘zim_ffmpeg_frame_toGDImage’:
/usr/local/src/ffmpeg-php-0.6.1/ffmpeg_frame.c:336: error: ‘PIX_FMT_RGBA32’ undeclared (first use in this function)
/usr/local/src/ffmpeg-php-0.6.1/ffmpeg_frame.c:336: error: (Each undeclared identifier is reported only once
/usr/local/src/ffmpeg-php-0.6.1/ffmpeg_frame.c:336: error: for each function it appears in.)
/usr/local/src/ffmpeg-php-0.6.1/ffmpeg_frame.c: In function ‘zim_ffmpeg_frame_ffmpeg_frame’:
/usr/local/src/ffmpeg-php-0.6.1/ffmpeg_frame.c:421: error: ‘PIX_FMT_RGBA32’ undeclared (first use in this function)
解决错误：
cd ffmpeg-php-0.6.1
vi ffmpeg_frame.c
:%s/PIX_FMT_RGBA32/PIX_FMT_RGB32 #替换错误字段
:wq
排除错误，继续安装
/usr/local/php/bin/phpize
./configure --with-php-config=/usr/local/php/bin/php-config --with-ffmpeg=/usr
make && make install
#成功返回
# make install
Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/
#cd /usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/;ls
ffmpeg.so #ffmpeg.so文件存在,说明编译成功
php.ini 中增加ffmpeg扩展
vim /usr/local/php/etc/php.ini
手工修改查找中的extension_dir = "./";
修改为
extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/";
并在此行后增加以下几行，然后保存：
#开启ffmpeg扩展
extension = "ffmpeg.so";
#实例：
; Directory in which the loadable extensions (modules) reside.
; http://php.net/extension-dir
; extension_dir = "./"
; On windows:
; extension_dir = "ext"
extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/"
extension = "ffmpeg.so"
查看是否正常
# /usr/local/php/bin/php -v
PHP 5.3.15 (cli) (built: Aug 10 2012 23:14:01)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies
php调用实例：
参考：/branches/ffmpeg-php/ffmpeg-php-0.6.1/test_ffmpeg.php
$moviepath = './test.flv';
$mov = new ffmpeg_movie($movie);
printf("file name = %s\n", $mov->getFileName());
printf("duration = %s seconds\n", $mov->getDuration());
printf("frame count = %s\n", $mov->getFrameCount());
printf("frame rate = %0.3f fps\n", $mov->getFrameRate());
printf("comment = %s\n", $mov->getComment());
printf("title = %s\n", $mov->getTitle());
printf("author = %s\n", $mov->getAuthor());
printf("copyright = %s\n", $mov->getCopyright());
printf("get bit rate = %d\n", $mov->getBitRate());
printf("has audio = %s\n", $mov->hasAudio() == 0 ? 'No' : 'Yes');
if ($mov->hasAudio()) {
printf("get audio stream id= %s\n", $mov->getAudioStreamId());
printf("get audio codec = %s\n", $mov->getAudioCodec());
printf("get audio bit rate = %d\n", $mov->getAudioBitRate());
printf("get audio sample rate = %d \n", $mov->getAudioSampleRate());
printf("get audio channels = %s\n", $mov->getAudioChannels());
}
printf("has video = %s\n", $mov->hasVideo() == 0 ? 'No' : 'Yes');
if ($mov->hasVideo()) {
printf("frame height = %d pixels\n", $mov->getFrameHeight());
printf("frame width = %d pixels\n", $mov->getFrameWidth());
printf("get video stream id= %s\n", $mov->getVideoStreamId());
printf("get video codec = %s\n", $mov->getVideoCodec());
printf("get video bit rate = %d\n", $mov->getVideoBitRate());
printf("get pixel format = %s\n", $mov->getPixelFormat());
printf("get pixel aspect ratio = %s\n", $mov->getPixelAspectRatio());
$frame = $mov->getFrame(10);
printf("get frame = %s\n", is_object($frame) ? 'true' : 'false');
printf(" get frame number = %d\n", $mov->getFrameNumber());
printf(" get frame width = %d\n", $frame->getWidth());
printf(" get frame height = %d\n", $frame->getHeight());
}
思考：通过安装ffmpeg-php扩展的方式获取信息虽然比较方便，但是扩展需要人去维护，一旦不维护了，扩展就无法使用。就像现在的情况 只能使用0.6.1的扩展版本对应FFmpeg version 0.6.5版本。如果想不受版本制约，请看php执行系统应用程序ffmpeg来获取对视频信息操作