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  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
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  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
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Sur d’autres sites (12429)

  • ffmpeg 2 pass encoding- understand the statistics in the output .log file

    21 juin 2021, par Yaelvi

    I am using 2 pass encoder to encode my input video with a target bitrate.
I want to get the encoder (x264) statistics from the first pass- these statistics are written to ffmpeg2pass.log
the output for each frame looks like that :

    


    in:2 out:2 type:B dur:2 cpbdur:2 q:28.41 aq:25.07 tex:4721 mv:2357 misc:2266 imb:24 pmb:527 smb:3049 d :- ref:0 ;

    


    How can I found is the meaning of each value ? (for example, mv is motion vectors, but what is the meaning of misc, imb, pmb etc.?)

    


    ffmpeg command used :
ffmpeg -f rawvideo -pix_fmt yuv422p16le -s:v 1280x720 -i "input_file.yuv" -c:v libx264 -pass 1 -stats -vstats -passlogfile "log_file_prefix" -f mp4 -y "output.mp4" &&
ffmpeg -f rawvideo -pix_fmt yuv422p16le -s:v 1280x720 -i "input_file.yuv" -c:v libx264 -pass 2 -passlogfile "log_file_prefix" -y "output.mp4"

    


  • ffmpeg 2 pass encoding- understand the statistics in the output .log file

    21 juin 2021, par Yaelvi

    I am using 2 pass encoder to encode my input video with a target bitrate.
I want to get the encoder (x264) statistics from the first pass- these statistics are written to ffmpeg2pass.log
the output for each frame looks like that :

    


    in:2 out:2 type:B dur:2 cpbdur:2 q:28.41 aq:25.07 tex:4721 mv:2357 misc:2266 imb:24 pmb:527 smb:3049 d :- ref:0 ;

    


    How can I found is the meaning of each value ? (for example, mv is motion vectors, but what is the meaning of misc, imb, pmb etc.?)

    


    ffmpeg command used :
ffmpeg -f rawvideo -pix_fmt yuv422p16le -s:v 1280x720 -i "input_file.yuv" -c:v libx264 -pass 1 -stats -vstats -passlogfile "log_file_prefix" -f mp4 -y "output.mp4" &&
ffmpeg -f rawvideo -pix_fmt yuv422p16le -s:v 1280x720 -i "input_file.yuv" -c:v libx264 -pass 2 -passlogfile "log_file_prefix" -y "output.mp4"

    


  • How do you do a two pass conversion in ffmpeg ?

    6 mars 2016, par user1461465

    I have tried the following :

    $ffmpeg = "/path/to/ffmpeg";
    
$source = "/path/to/video/source.mp4";
    
$dest = "/path/to/video/dest.mp4";
    
$format = "%s > %s 2>&1 & echo $! >> %s";
    
$a_rate = "44100";
    
$a_bitrate = "96k";
    
$v_bitrate = "3000k";
    
$resolution = "1280x720";
    
$outputfile = "/path/to/output.txt";
    
$pidfile = "/path/to/pid.txt";
    

    
exec(sprintf($format, $ffmpeg . " -i " . $source . " -vcodec libx264 -s " . $resolution . " -b " . $v_bitrate . " -pass 1 /dev/null && \ " . $ffmpeg . " -i " . $source . " -acodec libfaac -ar " . $a_rate . " -ab " . $a_bitrate . " -vcodec libx264 -s " . $resolution . " -b " . $v_bitrate . " -pass 2 " . $dest, $outputfile, $pidfile));

    Everything works perfectly if I do a single pass, but trying to do two passes like that doesn’t work. What is the proper way to do it ?

    Update :

    exec(sprintf($format, $ffmpeg . " -i " . $source . " -pass 1 -vcodec libx264 -s " . $resolution . " -b " . $v_bitrate . " -passlogfile " . $pass . " -f rawvideo -y /dev/null", $outputfile, $pidfile));
    
exec(sprintf($format, $ffmpeg . " -y -i " . $source . " -pass 2 -acodec libfaac -ar " . $a_rate . " -ab " . $a_bitrate . " -vcodec libx264 -s " . $resolution . " -b " . $v_bitrate . " -passlogfile " . $pass . " " . $dest, $outputfile, $pidfile));

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