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Autres articles (54)
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Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
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Support audio et vidéo HTML5
10 avril 2011MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...) -
Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)
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Anomalie #2256 : Remplacer eval par include
28 août 2011, par cedric -voir deja r18389. Il reste ensuite 2 cas d’eval notables :
celui de l’eval du cache quand il contient du PHP . cf résolution ci-dessus avec impact sur squelette principal.
celui de l’eval des morceaux de code lors de la compilation d’un squelette pour detecter un bug dans une boucle. Voir (...)
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PHP FFmpeg video aspect ratio problem [SOLVED]
29 août 2011, par Herr Kaleuni compiled the new version of FFMPEG and the padding commands have been deprecated.
As i try to get familiar with the new -vf pad= commands, i want to ask, how can i
convert a video without changing it's aspect ratio.I've checked numerous solutions from stackoverflow, nothing seemed to work.
Can someone, please post a working PHP example or cmd line. I would be VERY happy.Please note that the videos in question, could be 4:3 and also be 16:9
Let's say, i convert a 16:9 video to 640x480 format. It will need some bars at
the top and at the bottom. That is what i want to do.Thanks
EDIT :
I solved the problem on my own. The FFmpeg documentation is a little bit weird so
you have to experiment yourself a little bit.
The padding formula is like :$pad_horizontal = $target_width + $pad_left + $pad_right;
$pad_vertical = $target_height;
// blah
$command .= " -vf pad=$pad_horizontal:$pad_vertical:". $pad_left .":". $pad_top .":black";Pay special attention at the $pad_vertical part since the paddings there are better
not added so that the padding calculation of ffmpeg is not broken.Here is the full source code to the demo
<?
/***********************************************************************************
get_dimensions()
Takes in a set of video dimensions - original and target - and returns the optimal conversion
dimensions. It will always return the smaller of the original or target dimensions.
For example: original dimensions of 320x240 and target dimensions of 640x480.
The result will be 320x240 because converting to 640x480 would be a waste of disk
space, processing, and bandwidth (assuming these videos are to be downloaded).
@param $original_width: The actual width of the original video file which is to be converted.
@param $original_height: The actual height of the original video file which is to be converted.
@param $target_width: The width of the video file which we will be converting to.
@param $target_height: The height of the video file which we will be converting to.
@param $force_aspect: Boolean value of whether or not to force conversion to the target's
aspect ratio using padding (so the video isn't stretched). If false, the
conversion dimensions will retain the aspect ratio of the original.
Optional parameter. Defaults to true.
@return: An array containing the size and padding information to be used for conversion.
Format:
Array
(
[width] => int
[height] => int
[padtop] => int // top padding (if applicable)
[padbottom] => int // bottom padding (if applicable)
[padleft] => int // left padding (if applicable)
[padright] => int // right padding (if applicable)
)
***********************************************************************************/
function get_dimensions($original_width,$original_height,$target_width,$target_height,$force_aspect)
{
if(!isset($force_aspect))
{
$force_aspect = true;
}
// Array to be returned by this function
$target = array();
$target['padleft'] = 0;
$target['padright'] = 0;
$target['padbottom'] = 0;
$target['padtop'] = 0;
// Target aspect ratio (width / height)
$aspect = $target_width / $target_height;
// Target reciprocal aspect ratio (height / width)
$raspect = $target_height / $target_width;
if($original_width/$original_height !== $aspect)
{
// Aspect ratio is different
if($original_width/$original_height > $aspect)
{
// Width is the greater of the two dimensions relative to the target dimensions
if($original_width < $target_width)
{
// Original video is smaller. Scale down dimensions for conversion
$target_width = $original_width;
$target_height = round($raspect * $target_width);
}
// Calculate height from width
$original_height = round($original_height / $original_width * $target_width);
$original_width = $target_width;
if($force_aspect)
{
// Pad top and bottom
$dif = round(($target_height - $original_height) / 2);
$target['padtop'] = $dif;
$target['padbottom'] = $dif;
}
}
else
{
// Height is the greater of the two dimensions relative to the target dimensions
if($original_height < $target_height)
{
// Original video is smaller. Scale down dimensions for conversion
$target_height = $original_height;
$target_width = round($aspect * $target_height);
}
//Calculate width from height
$original_width = round($original_width / $original_height * $target_height);
$original_height = $target_height;
if($force_aspect)
{
// Pad left and right
$dif = round(($target_width - $original_width) / 2);
$target['padleft'] = $dif;
$target['padright'] = $dif;
}
}
}
else
{
// The aspect ratio is the same
if($original_width !== $target_width)
{
if($original_width < $target_width)
{
// The original video is smaller. Use its resolution for conversion
$target_width = $original_width;
$target_height = $original_height;
}
else
{
// The original video is larger, Use the target dimensions for conversion
$original_width = $target_width;
$original_height = $target_height;
}
}
}
if($force_aspect)
{
// Use the target_ vars because they contain dimensions relative to the target aspect ratio
$target['width'] = $target_width;
$target['height'] = $target_height;
}
else
{
// Use the original_ vars because they contain dimensions relative to the original's aspect ratio
$target['width'] = $original_width;
$target['height'] = $original_height;
}
return $target;
}
function get_vid_dim($file)
{
$command = '/usr/bin/ffmpeg -i ' . escapeshellarg($file) . ' 2>&1';
$dimensions = array();
exec($command,$output,$status);
if (!preg_match('/Stream #(?:[0-9\.]+)(?:.*)\: Video: (?P<videocodec>.*) (?P<width>[0-9]*)x(?P<height>[0-9]*)/',implode("\n",$output),$matches))
{
preg_match('/Could not find codec parameters \(Video: (?P<videocodec>.*) (?P<width>[0-9]*)x(?P<height>[0-9]*)\)/',implode("\n",$output),$matches);
}
if(!empty($matches['width']) && !empty($matches['height']))
{
$dimensions['width'] = $matches['width'];
$dimensions['height'] = $matches['height'];
}
return $dimensions;
}
$command = '/usr/bin/ffmpeg -i ' . $src . ' -ab 96k -b 700k -ar 44100 -f flv -s ' . '640x480 -acodec mp3 '. $video_output_dir . $video_filename . ' 2>&1';
define( 'VIDEO_WIDTH', '640' );
define( 'VIDEO_HEIGHT', '480' );
$src_1 = getcwd() .'/'. 'test_video1.mpeg';
$video_filename1 = 'video1.flv';
$src_2 = getcwd() .'/'. 'test_video2.mp4';
$video_filename2 = 'video2.flv';
$src_3 = getcwd() .'/'. 'test_video3.mp4';
$video_filename3 = 'video3.flv';
convert_video( $src_1, $video_filename1 );
convert_video( $src_2, $video_filename2 );
convert_video( $src_3, $video_filename3 );
function convert_video( $src = '', $video_filename = '' )
{
$video_output_dir = getcwd() .'/';
@unlink ( $video_output_dir . $video_filename );
$original = get_vid_dim($src);
$target = get_dimensions( $original['width'], $original['height'], VIDEO_WIDTH, VIDEO_HEIGHT, TRUE );
echo '<pre>';
print_r( $original );
echo '</pre>';
echo '<pre>';
print_r( $target );
echo '</pre>';
$target_width = $target['width'];
$target_height = $target['height'];
$pad_left = $target['padleft'];
$pad_right = $target['padright'];
$pad_bottom = $target['padbottom'];
$pad_top = $target['padtop'];
$pad_horizontal = $target_width + $pad_left + $pad_right;
$pad_vertical = $target_height; // + $pad_top + $pad_bottom;
$command = '/usr/bin/ffmpeg -i ' . $src;
// $command .= " -s {$target_width}x{$target_height} ";
$command .= " -vf pad=$pad_horizontal:$pad_vertical:". $pad_left .":". $pad_top .":black";
$command .= ' -ab 96k -b 700k -ar 44100';
$command .= ' -f flv ';
$command .= ' -qscale 4';
$command .= ' -ss 30';
$command .= ' -t 5';
$command .= ' -ac 2 -ab 128k -qscale 5 ';
$command .= ' ' . $video_output_dir . $video_filename;
exec( $command, $output, $status );
echo '<pre>';
print_r( $command );
echo '</pre>';
if ( $status == 0 )
{
echo '<br />Convert OK. <br />';
}
else
{
echo '<pre>';
print_r( $output );
echo '</pre>';
}
echo '<br />';
echo '<br />';
}
?>
</height></width></videocodec></height></width></videocodec>Thank you and have fun :)
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WebM Encoded file plays in Chrome but not FFv6 HTML5-Video
21 novembre 2011, par Austin SI'm trying to use the new fancy html5 video player element and I was wondering :
I encoded a high resolution .mov container in VLC v1.1.9 to WebM format (although an FFMPEG command line would be extremely valuable if you have one handy) and it plays just fine in Chrome, but it won't open in Firefox. Would anyone have any ideas or in what direction I should be looking ?
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