FFmpegPHP的安装使用详解

http://blog.163.com/chenzhenhua_007/blog/static/128492649201182335633965/

2011-09-23 16:30:53 | 分类： PHP+MySQL | 字号订阅

FFmpegPHP 是一个纯面向对象的 ffmpeg 的 PHP封装。提供一些简单易用、面向对象的API用以访问视频和音频文件的信息，可直接从视频中获取帧的图片，这常用来做视频的缩略图。支持的视频格式包括： MOV, AVI, MPG, 和 WMV.
FFmpegPHP封装，没有提供视频转换的接口。（至少我没找到，如果大家知道还望赐教。）

我使用的集成环境APMServ。

1.下载ffmpeg－php： http://sergey89.ru/files/ffmpeg-php-win32-all.zip

2. 解压 ffmpeg-php-win32-all.zip 后有下面几个文件：

avcodec-51.dll

avformat-51.dll

avutil-49.dll

php_ffmpeg.dll

pthreadGC2.dll

3. 将四个文件拷贝到windows/system32文件夹下面

avcodec-51.dll, avformat-51.dll, avutil-49.dll, pthreadGC2.dll

4.将php_ffmpeg.dll拷贝到php的ext目录下。

5. 然后需要到apache/bin文件下找到php.ini文件下允许使用dll文件加入extension=php_ffmpeg.dll 并允许 extension=php_gd2.dll， extension=php_gettext.dll这两个设置。（去掉前面的分号）

    extension=php_gd2.dll
    extension=php_gettext.dll
    extension=php_ffmpeg.dll

6. 重新启动APMServ后使用phpinfo()函数看到一下信息配置：

以上就表明ffmpeg在php环境中配置成功了。

7. 下面我们建立一个php的页面来测试是不是可以使用ffmpeg的一些函数功能。建立testvideo.php文件

代码如下：

<?php

extension_loaded('ffmpeg');

$ffmpegInstance = new ffmpeg_movie('D:\Program Files\APMServ5.2.6\www\htdocs\test.mpg');
echo "getDuration: " . $ffmpegInstance->getDuration()." " .
"getFrameCount: " . $ffmpegInstance->getFrameCount()." " .
"getFrameRate: " . $ffmpegInstance->getFrameRate()." " .
"getFilename: " . $ffmpegInstance->getFilename()." " .
"getComment: " . $ffmpegInstance->getComment()." " .
"getTitle: " . $ffmpegInstance->getTitle()." " .
"getAuthor: " . $ffmpegInstance->getAuthor()." " .
"getCopyright: " . $ffmpegInstance->getCopyright()." " .
"getArtist: " . $ffmpegInstance->getArtist()." " .
"getGenre: " . $ffmpegInstance->getGenre()." " .
"getTrackNumber: " . $ffmpegInstance->getTrackNumber()." " .
"getYear: " . $ffmpegInstance->getYear()." " .
"getFrameHeight: " . $ffmpegInstance->getFrameHeight()." " .
"getFrameWidth: " . $ffmpegInstance->getFrameWidth()." " .
"getPixelFormat: " . $ffmpegInstance->getPixelFormat()." " .
"getBitRate: " . $ffmpegInstance->getBitRate()." " .
"getVideoBitRate: " . $ffmpegInstance->getVideoBitRate()." " .
"getAudioBitRate: " . $ffmpegInstance->getAudioBitRate()." " .
"getAudioSampleRate: " . $ffmpegInstance->getAudioSampleRate()." " .
"getVideoCodec: " . $ffmpegInstance->getVideoCodec()." " .
"getAudioCodec: " . $ffmpegInstance->getAudioCodec()." " .
"getAudioChannels: " . $ffmpegInstance->getAudioChannels()." " .
"hasAudio: " . $ffmpegInstance->hasAudio();

8.执行后如果拿到视频的一些信息如下就表示环境配置成功了，那我们就可以开始开发我们的视频操作。

执行结果：

略....

9.实现视频的截图。（接上面的php代码）

$ff_frame = $ffmpegInstance->getFrame(20);//截取视频第20帧的图像
$gd_image = $ff_frame->toGDImage();
$img=$_SERVER['DOCUMENT_ROOT']."/test2.jpg";//要生成图片的绝对路径
imagejpeg($gd_image, $img);//创建jpg图像
imagedestroy($gd_image);//销毁一图像

10.关于ffmpeg-php的API。

ffmpeg_movie object methods

Method	Description
$movie = new ffmpeg_movie(String path_to_media, boolean persistent)	Open a video or audio file and return it as an object. path_to_media - File path of video or audio file to open. persistent - Whether to open this media as a persistent resource. See the PHP documentation for more info about persistent resources
$movie->getDuration()	Return the duration of a movie or audio file in seconds.
$movie->getFrameCount()	Return the number of frames in a movie or audio file.
$movie->getFrameRate()	Return the frame rate of a movie in fps.
$movie->getFilename()	Return the path and name of the movie file or audio file.
$movie->getComment()	Return the comment field from the movie or audio file.
$movie->getTitle()	Return the title field from the movie or audio file.
$movie->getAuthor() alias $movie->getArtist()	Return the author field from the movie or the artist ID3 field from an mp3 file.
$movie->getCopyright()	Return the copyright field from the movie or audio file.
$movie->getArtist()	Return the artist ID3 field from an mp3 file.
$movie->getGenre()	Return the genre ID3 field from an mp3 file.
$movie->getTrackNumber()	Return the track ID3 field from an mp3 file.
$movie->getYear()	Return the year ID3 field from an mp3 file.
$movie->getFrameHeight()	Return the height of the movie in pixels.
$movie->getFrameWidth()	Return the width of the movie in pixels.
$movie->getPixelFormat()	Return the pixel format of the movie.
$movie->getBitRate()	Return the bit rate of the movie or audio file in bits per second.
$movie->getVideoBitRate()	Return the bit rate of the video in bits per second. NOTE: This only works for files with constant bit rate.
$movie->getAudioBitRate()	Return the audio bit rate of the media file in bits per second.
$movie->getAudioSampleRate()	Return the audio sample rate of the media file in bits per second.
$movie->getFrameNumber()	Return the current frame index.
$movie->getVideoCodec()	Return the name of the video codec used to encode this movie as a string.
$movie->getAudioCodec()	Return the name of the audio codec used to encode this movie as a string.
$movie->getAudioChannels()	Return the number of audio channels in this movie as an integer.
$movie->hasAudio()	Return boolean value indicating whether the movie has an audio stream.
$movie->hasVideo()	Return boolean value indicating whether the movie has a video stream.
$movie->getFrame([Integer framenumber])	Returns a frame from the movie as an ffmpeg_frame object. Returns false if the frame was not found. framenumber - Frame from the movie to return. If no framenumber is specified, returns the next frame of the movie.
$movie->getNextKeyFrame()	Returns the next key frame from the movie as an ffmpeg_frame object. Returns false if the frame was not found.

==============================================================
ffmpeg_frame object methods

Method	Description
$frame = new ffmpeg_frame(Resource gd_image)	Create a frame object from a GD image. NOTE: This function will not be available if GD is not enabled.
$frame->getWidth()	Return the width of the frame.
$frame->getHeight()	Return the height of the frame.
$frame->getPTS() alias $frame->getPresentationTimestamp()	Return the presentation time stamp of the frame.
$frame->resize(Integer width, Integer height [, Integer crop_top [, Integer crop_bottom [, Integer crop_left [, Integer crop_right ]]]])	Resize and optionally crop the frame. (Cropping is built into ffmpeg resizing so I'm providing it here for completeness.) width - New width of the frame (must be an even number). height - New height of the frame (must be an even number). croptop - Remove [croptop] rows of pixels from the top of the frame. cropbottom - Remove [cropbottom] rows of pixels from the bottom of the frame. cropleft - Remove [cropleft] rows of pixels from the left of the frame. cropright - Remove [cropright] rows of pixels from the right of the frame. NOTE: Cropping is always applied to the frame before it is resized. Crop values must be even numbers.
$frame->crop(Integer crop_top [, Integer crop_bottom [, Integer crop_left [, Integer crop_right ]]])	Crop the frame. croptop - Remove [croptop] rows of pixels from the top of the frame. cropbottom - Remove [cropbottom] rows of pixels from the bottom of the frame. cropleft - Remove [cropleft] rows of pixels from the left of the frame. cropright - Remove [cropright] rows of pixels from the right of the frame. NOTE: Crop values must be even numbers.
$frame->toGDImage()	Returns a truecolor GD image of the frame. NOTE: This function will not be available if GD is not enabled.

==============================================================
ffmpeg_animated_gif object methods

Method	Description
$gif = new ffmpeg_animated_gif(String output_file_path, Integer width, Integer height, Integer frame_rate, [Integer loop_count])	create a new ffmpeg_animated_gif object output_file_path - Location in the filesystem where the animated gif will be written. width - Width of the animated gif. height - Height of the animated gif. frame_rate - Frame rate of the animated gif in frames per second.. loop_count - Number of times to loop the animation. Put a zero here to loop forever or omit this parameter to disable looping.
$frame->addFrame( ffmpeg_frame frame_to_add)	Add a frame to the end of the animated gif. frame_to_add - The ffmpeg_frame object to add to the end of the animated gif.

FFmpegPHP的安装使用详解

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