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Sur d’autres sites (8099)

  • Get video duration from file location without using ffmpeg

    12 juillet 2021, par user3508453
    function getDuration($file){
        if (file_exists($file)){
         ## open and read video file
        $handle = fopen($file, "r");
        ## read video file size
        $contents = fread($handle, filesize($file));
        fclose($handle);
        $make_hexa = hexdec(bin2hex(substr($contents,strlen($contents)-3)));
        if (strlen($contents) > $make_hexa){
        $pre_duration = hexdec(bin2hex(substr($contents,strlen($contents)-$make_hexa,3))) ;
        $post_duration = $pre_duration/1000;
        $timehours = $post_duration/3600;
        $timeminutes =($post_duration % 3600)/60;
        $timeseconds = ($post_duration % 3600) % 60;
        $timehours = explode(".", $timehours);
        $timeminutes = explode(".", $timeminutes);
        $timeseconds = explode(".", $timeseconds);
        $duration = $timehours[0]. ":" . $timeminutes[0]. ":" . $timeseconds[0];}
        return $duration;
        }
        else {
        return false;
        }
}


    



    This code is working fine but for some files it shows variable $duration is undefined even if the file exists ! please help someone.

    



    Source Daniweb

    



    is there any other way to get the video duration ? 
and is it fast enough ?

    


  • Get video duration from file location without using ffmpeg

    15 juin 2014, par user3508453
    function getDuration($file){
    
        if (file_exists($file)){
    
         ## open and read video file
    
        $handle = fopen($file, "r");
    
        ## read video file size
    
        $contents = fread($handle, filesize($file));
    
        fclose($handle);
    
        $make_hexa = hexdec(bin2hex(substr($contents,strlen($contents)-3)));
    
        if (strlen($contents) > $make_hexa){
    
        $pre_duration = hexdec(bin2hex(substr($contents,strlen($contents)-$make_hexa,3))) ;
    
        $post_duration = $pre_duration/1000;
    
        $timehours = $post_duration/3600;
    
        $timeminutes =($post_duration % 3600)/60;
    
        $timeseconds = ($post_duration % 3600) % 60;
    
        $timehours = explode(".", $timehours);
    
        $timeminutes = explode(".", $timeminutes);
    
        $timeseconds = explode(".", $timeseconds);
    
        $duration = $timehours[0]. ":" . $timeminutes[0]. ":" . $timeseconds[0];}
    
        return $duration;
    
        }
    
        else {
    
        return false;
    
        }
    
}

    This code is working fine but for some files it shows variable $duration is undefined even if the file exists ! please help someone.

    Source Daniweb

    is there any other way to get the video duration ?
    and is it fast enough ?

  • Read part of every frame of a video file

    18 novembre 2012, par user1414470

    I'm doing some tracking on video files. First I separate frames using ffmpeg and the for each frame i apply a mask and then perform the tracking algorithm.

    To make this process faster I'm thinking about reading only the parts I need. like reading the part that I apply the mask or better than that reading boxes around the previous positions of objects. So I'm looking for a way to decode and read a specific part of a specific frame from a video file. Is there any way to do that ?

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