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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (54)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
Ajouter notes et légendes aux images
7 février 2011, parPour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
Modification lors de l’ajout d’un média
Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)
Sur d’autres sites (10427)
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Improve ffmpeg CPU usage by compromising quality
29 septembre 2016, par Hardik JunejaI am using FFMpeg for screen capturing.
I am looking for a screen capturing tool that will run on 1000 of VMs (windows and mac).The VMs have limited CPU (1 core) and 2GB ram and No GPU.Currently I invoke ffmpeg with
ffmpeg -y -framerate 8 -f dshow -f gdigrab -i "desktop" -c:v libx264 -crf 0 -preset ultrafast -threads 0 temp.mkv
I am using gdigrab to capture screen ? Is there any better options that might reduce cpu usage ? or changing the encoder or format ?
I am aiming for 4-5% reduction in CPU usage.
Thanks in advance
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ffmpeg fails on conversion from .mov to .mp4 fails aT 98%
3 avril 2013, par user2241249Our code is below. When converting a uploaded
.mov
to.mp4
the conversion halts at 98%.Almost all of our other preferred formats encode flawlessly. Anyone has any clue on where we went wrong ? We are struggling on this for a while now so we want to ask the experts, thanks in advance for any help.
<?php
$Path = dirname(__FILE__) . "/";
$url = "http://" . $_SERVER['SERVER_NAME'] . str_replace('\\', '/', dirname($_SERVER['SCRIPT_NAME'])) . "/";
session_start();
include_once 'inc/config.inc.php';
include_once 'common.php';
include_once 'inc/ffmpegprogressbar.class.php';
ob_flush();
?>
<?php
// Specifie Inputfile for FFMPEG
$count = count($_SESSION['Files']);
// $file = array_pop($_SESSION['Files']);
$FileInstance = array_pop($_SESSION['Files']);
//$FileInstance = $_SESSION['Files'][0];
$file = $FileInstance['FileName'];
$passNeeded = $FileInstance['PassNeeded'];
$fmt = $FileInstance['fmt'];
$FFMPEGInput = $Path . 'data/' . $_SESSION['OldSession'] . "/" . $file;
$timeUnique = time();
//echo "Start:Session holds: ".$_SESSION["cstatus"].", cstatus var = $cstatus";
/* if ($FileInstance['PassNeeded'] == 5) {
$FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 1920x1080";
} else if ($FileInstance['PassNeeded'] == 4) {
$FFMPEGParams ="-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 1280x720";
} else if ($FileInstance['PassNeeded'] == 3) {
$FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 854x480";
} else if ($FileInstance['PassNeeded'] == 2) {
$FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 640x360";
}
*/
if($fmt=="flv"){
if ($FileInstance['PassNeeded'] == 5) {
$FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 1920x1080";
} else if ($FileInstance['PassNeeded'] == 4) {
$FFMPEGParams ="-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 1280x720";
} else if ($FileInstance['PassNeeded'] == 3) {
$FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 854x480";
} else if ($FileInstance['PassNeeded'] == 2) {
$FFMPEGParams = "-r 1000 -ar 11025 -ab 32 -f $fmt -sameq -g 15 -s 640x360";
}
}elseif($fmt=="mp4"){
$FFMPEGParams = " -pix_fmt yuv420p -s 640x360";
}elseif($fmt=="ogv"){
$FFMPEGParams = " -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b 125k -s 640x360";
}elseif($fmt=="webm"){
$FFMPEGParams = " -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b 125k -s 640x360";
//}elseif($fmt!==""){
//-i %1 -s qvga -acodec libfaac -ar 22050 -ab 128k -vcodec libx264 -threads 0 -f ipod %2
//-vcodec mpeg4 -acodec aac output.mp4
//$FFMPEGParams = "-r 20 -ar 44100 -ab 196 -f $fmt -s 480x351";
}
if ($FileInstance['PassNeeded'] > 2) {
$FileInstance['PassNeeded'] = $FileInstance['PassNeeded'] - 1;
array_unshift($_SESSION['Files'], $FileInstance);
}
$flv_rpath = 'data/' . $_SESSION['OldSession'] . "/" . $file. $timeUnique . ".".$fmt;
$FFMPEGOutput = $FFMPEGInput . $timeUnique . ".$fmt";
$_SESSION['ConvertedFiles'][$file][] = array('Pass' => $passNeeded, 'OutFile' => $file . $timeUnique . ".$fmt","fmt"=>$fmt);
if (!$_GET["pkey"]) {
$pkey = rand();
} elseif (file_exists('log/' . $_GET["pkey"] . '.ffmpeg')) {
$pkey = $_GET["pkey"];
} else {
$pkey = rand();
}
// initializing and create ProgressBar
flush();
$FFMPEGProgressBar = &new FFMPEGProgressBar();
flush();
// Show Progressbar
if ($count > 0) {
if ($FileInstance['PassNeeded'] < 3) {
define('FFMPEG_LIBRARY', '/usr/local/bin/ffmpeg ');
$extension = "ffmpeg";
$extension_soname = $extension . "." . PHP_SHLIB_SUFFIX;
$extension_fullname = PHP_EXTENSION_DIR . "/" . $extension_soname;
if (!extension_loaded($extension)) {
dl($extension_soname) or die("Can't load extension $extension_fullname\n");
}
exec(FFMPEG_LIBRARY . " -y -i '" . $FFMPEGInput . "' -vframes 1 -ss 00:00:03 -an -vcodec png -f rawvideo -s 160x90 '$FFMPEGInput.png'");
}
$FFMPEGProgressBar->Show($pkey, $count, $url, $passNeeded, $file, $timeUnique,$fmt);
if (!$_GET["pkey"] || !file_exists('log/' . $_GET["pkey"] . '.ffmpeg')) {
flush();
$FFMPEGProgressBar = &new FFMPEGProgressBar();
flush();
@$FFMPEGProgressBar->execFFMPEG($FFMPEGInput, $FFMPEGOutput, $FFMPEGParams, $pkey);
flush();
$_SESSION['new_space']["video"] = 'data/' . $_SESSION['OldSession'] . "/" . $file;
$_SESSION['new_space']["{$FileInstance['name']}"] = $flv_rpath;
$_SESSION['new_space']["session"] = $_SESSION['OldSession'];
}
//echo "End:Session holds: ".$_SESSION["cstatus"].", cstatus var = $cstatus";
} else {
// header("Location: $url" . "index.php" );
echo "<code class="echappe-js"><script type=\"text/javascript\">window.location.href=&#39;" . $url . "&#39;;</script>No Input " ;
}
// ShowProgressbar
?>
-
Improve ffmpeg CPU usage by compromising quality
29 septembre 2016, par Hardik JunejaI am using FFMpeg for screen capturing.
I am looking for a screen capturing tool that will run on 1000 of VMs (windows and mac).The VMs have limited CPU (1 core) and 2GB ram and No GPU.Currently I invoke ffmpeg with
ffmpeg -y -framerate 8 -f dshow -f gdigrab -i "desktop" -c:v libx264 -crf 0 -preset ultrafast -threads 0 temp.mkv
I am using gdigrab to capture screen ? Is there any better options that might reduce cpu usage ? or changing the encoder or format ?
I am aiming for 4-5% reduction in CPU usage.
Thanks in advance