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Sur d’autres sites (14215)

  • Improve ffmpeg CPU usage by compromising quality

    29 septembre 2016, par Hardik Juneja

    I 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

  • ffmpeg fails on conversion from .mov to .mp4 fails aT 98%

    3 avril 2013, par user2241249

    Our 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">&lt;script type=\&quot;text/javascript\&quot;&gt;window.location.href=&amp;#39;&quot; . $url . &quot;&amp;#39;;&lt;/script&gt;
    

    No Input" ;
    
    }
    
// ShowProgressbar
    
 ?>

  • Improve ffmpeg CPU usage by compromising quality

    29 septembre 2016, par Hardik Juneja

    I 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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