chamilo-lms/vendor/php-ffmpeg/php-ffmpeg

#PHP FFmpeg

An Object Oriented library to convert video/audio files with FFmpeg / AVConv.

Check another amazing repo : PHP FFMpeg extras, you will find lots of Audio/Video formats there.

Your attention please

This library requires a working FFMpeg install. You will need both FFMpeg and FFProbe binaries to use it. Be sure that these binaries can be located with system PATH to get the benefit of the binary detection, otherwise you should have to explicitely give the binaries path on load.

For Windows users : Please find the binaries at http://ffmpeg.zeranoe.com/builds/.

Installation

The recommended way to install PHP-FFMpeg is through Composer.

{
    "require": {
        "php-ffmpeg/php-ffmpeg": "0.3.x-dev@dev"
    }
}

Basic Usage

$ffmpeg = FFMpeg\FFMpeg::create();
$video = $ffmpeg->open('video.mpg');
$video
    ->filters()
    ->resize(new FFMpeg\Coordinate\Dimension(320, 240))
    ->synchronize();
$video
    ->frame(FFMpeg\Coordinate\TimeCode::fromSeconds(10))
    ->save('frame.jpg');
$video
    ->save(new FFMpeg\Format\Video\X264(), 'export-x264.mp4')
    ->save(new FFMpeg\Format\Video\WMV(), 'export-wmv.wmv')
    ->save(new FFMpeg\Format\Video\WebM(), 'export-webm.webm');

Documentation

This documentation is an introduction to discover the API. It's recommended to browse the source code as it is self-documented.

FFMpeg

FFMpeg\FFMpeg is the main object to use to manipulate medias. To build it, use the static FFMpeg\FFMpeg::create :

$ffmpeg = FFMpeg\FFMpeg::create();

FFMpeg will autodetect ffmpeg and ffprobe binaries. If you want to give binary paths explicitely, you can pass an array as configuration. A Psr\Logger\LoggerInterface can also be passed to log binary executions.

$ffmpeg = FFMpeg\FFMpeg::create(array(
    'ffmpeg.binaries'  => '/opt/local/ffmpeg/bin/ffmpeg',
    'ffprobe.binaries' => '/opt/local/ffmpeg/bin/ffprobe',
    'timeout'          => 3600, // The timeout for the underlying process
    'ffmpeg.threads'   => 12,   // The number of threads that FFMpeg should use
), $logger);

Manipulate media

FFMpeg\FFMpeg creates media based on file paths. To open a file path, use the FFMpeg\FFMpeg::open method.

$ffmpeg->open('video.mpeg');

Two types of media can be resolved : FFMpeg\Media\Audio and FFMpeg\Media\Video. A third type, FFMpeg\Media\Frame, is available through videos.

Video

FFMpeg\Media\Video can be transcoded, ie : change codec, isolate audio or video. Frames can be extracted.

Transcoding

You can transcode videos using the FFMpeg\Media\Video:save method. You will pass a FFMpeg\Format\FormatInterface for that.

$format = new Format\Video\X264();
$format->on('progress', function ($video, $format, $percentage) {
    echo "$percentage % transcoded";
});

$video->save($format, 'video.avi');

Transcoding progress can be monitored in realtime, see Format documentation below for more informations.

Extracting image

You can extract a frame at any timecode using the FFMpeg\Media\Video::frame method.

This code return a FFMpeg\Media\Frame instance corresponding to the second 42. You can pass any FFMpeg\Coordinate\TimeCode as argument, see dedicated documentation below for more information.

$frame = $video->frame(FFMpeg\Coordinate\TimeCode::fromSeconds(42));
$frame->save('image.jpg');

Filters

You can apply filters on FFMpeg\Media\Video with the FFMpeg\Media\Video::addFilter method. Video accepts Audio and Video filters.

You can build your own filters and some are bundled in PHP-FFMpeg - they are accessible through the FFMpeg\Media\Video::filters method.

Filters are chainable

$video
    ->filters()
    ->resize($dimension, $mode, $useStandards)
    ->framerate($framerate, $gop)
    ->synchronize();

Resize

Resizes a video to a given size.

$video->filters()->resize($dimension, $mode, $useStandards);

The resize filter takes three parameters :

• $dimension, an instance of FFMpeg\Coordinate\Dimension
• $mode, one of the constants FFMpeg\Filters\Video\ResizeFilter::RESIZEMODE_* constants
• $useStandards, a boolean to force the use of the nearest aspect ratio standard.

Framerate

Changes the frame rate of the video.

$video->filters()->framerate($framerate, $gop);

The framerate filter takes two parameters :

• $framerate, an instance of FFMpeg\Coordinate\Framerate
• $gop, a GOP value (integer)

Synchronize

Synchronizes audio and video.

Some containers may use a delay that results in desynchronized outputs. This filters solves this issue.

$video->filters()->synchronize();

Audio

FFMpeg\Media\Audio can be transcoded, ie : change codec, isolate audio or video. Frames can be extracted.

Transcoding

You can transcode audios using the FFMpeg\Media\Audio:save method. You will pass a FFMpeg\Format\FormatInterface for that.

$format = new Format\Audio\Flac();
$format->on('progress', function ($$audio, $format, $percentage) {
    echo "$percentage % transcoded";
});

$audio->save($format, 'track.flac');

Transcoding progress can be monitored in realtime, see Format documentation below for more informations.

Filters

You can apply filters on FFMpeg\Media\Audio with the FFMpeg\Media\Audio::addFilter method. It only accepts audio filters.

You can build your own filters and some are bundled in PHP-FFMpeg - they are accessible through the FFMpeg\Media\Audio::filters method.

Resample

Resamples an audio file.

$audio->filters()->resample($rate);

The resample filter takes two parameters :

• $rate, a valid audio sample rate value (integer)

Frame

A frame is a image at a timecode of a video ; see documentation above about frame extraction.

You can save frames using the FFMpeg\Media\Frame::save method.

$frame->save('target.jpg');

This method has a second optional boolean parameter. Set it to true to get accurate images ; it takes more time to execute.

Formats

A format implements FFMpeg\Format\FormatInterface. To save to a video file, use FFMpeg\Format\VideoInterface, and FFMpeg\Format\AudioInterface for audio files.

Format can also extends FFMpeg\Format\ProgressableInterface to get realtime informations about the transcoding.

Predefined formats already provide progress informations as events.

$format = new Format\Video\X264();
$format->on('progress', function ($video, $format, $percentage) {
    echo "$percentage % transcoded";
});

$video->save($format, 'video.avi');

The callback provided for the event can be any callable.

Create your own format

The easiest way to create a format is to extend the abstract FFMpeg\Format\Video\DefaultVideo and FFMpeg\Format\Audio\DefaultAudio. and implement the following methods.

class CustomWMVFormat extends FFMpeg\Format\Video\DefaultVideo
{
    public function __construct($audioCodec = 'wmav2', $videoCodec = 'wmv2')
    {
        $this
            ->setAudioCodec($audioCodec)
            ->setVideoCodec($videoCodec);
    }

    public function supportBFrames()
    {
        return false;
    }

    public function getAvailableAudioCodecs()
    {
        return array('wmav2');
    }

    public function getAvailableVideoCodecs()
    {
        return array('wmv2');
    }
}

Coordinates

FFMpeg use many units for time and space coordinates.

• FFMpeg\Coordinate\AspectRatio represents an aspect ratio.
• FFMpeg\Coordinate\Dimension represent a dimension.
• FFMpeg\Coordinate\FrameRate represent a framerate.
• FFMpeg\Coordinate\Point represent a point.
• FFMpeg\Coordinate\TimeCode represent a timecode.

FFProbe

FFMpeg\FFProbe is used internally by FFMpeg\FFMpeg to probe medias. You can also use it to extract media metadata.

$ffprobe = FFMpeg\FFProbe::create();
$ffprobe
    ->streams('/path/to/video/mp4') // extracts streams informations
    ->videos()                      // filters video streams
    ->first()                       // returns the first video stream
    ->get('duration');              // returns the duration property

##Using with Silex Microframework

Service provider is easy to set up :

$app = new Silex\Application();
$app->register(new FFMpeg\FFMpegServiceProvider());

$video = $app['ffmpeg']->open('video.mpeg');

Available options are as follow :

$app->register(new FFMpeg\FFMpegServiceProvider(), array(
    'ffmpeg.configuration' => array(
        'ffmpeg.threads'   => 4,
        'ffmpeg.timeout'   => 300,
        'ffmpeg.binaries'  => '/opt/local/ffmpeg/bin/ffmpeg',
        'ffprobe.timeout'  => 30,
        'ffprobe.binaries' => '/opt/local/ffmpeg/bin/ffprobe',
    ),
    'ffmpeg.logger' => $logger,
));

API Browser

Browse the API

License

This project is licensed under the MIT license.