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Autres articles (111)

  • Script d’installation automatique de MediaSPIP

    25 avril 2011, par

    Afin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
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    La documentation de l’utilisation du script d’installation (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Les notifications de la ferme

    1er décembre 2010, par

    Afin d’assurer une gestion correcte de la ferme, il est nécessaire de notifier plusieurs choses lors d’actions spécifiques à la fois à l’utilisateur mais également à l’ensemble des administrateurs de la ferme.
    Les notifications de changement de statut
    Lors d’un changement de statut d’une instance, l’ensemble des administrateurs de la ferme doivent être notifiés de cette modification ainsi que l’utilisateur administrateur de l’instance.
    À la demande d’un canal
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Sur d’autres sites (6859)

  • Split video file from 'n' th frame to end of video in Linux

    17 novembre 2011, par Skkard

    I need to split a video file using frames as the measure, e.g. I need to save the part of the video from the 34th frame to the end of the video in Linux( specifically fedora 16, xfce, 64bit ).

    I've tried using ffmpeg, using the '-vframes' option to specify how many frames to save, but it starts from the beginning, so is not that useful. How can I start from a certain frame in between the video and save the video from there to the end in a new file.

    I know about the '-ss' option, but while converting number of frames to the specified time, there might be errors( or so I believe. Please correct me if I'm wrong ) due to rounding.

    Could you please suggest a method ? Thanks !

  • Missing audio and problems playing FLV video converted from 720p .mov file with FFMPEG

    18 novembre 2011, par undefined

    I have some .mov video files recorded from a JVC GC-FM1 HD video camera in 720p mode. I have FFMPEG running on a Linux box that I upload files to for encoding into FLV format. The video appears to be encoding ok, but there is no audio in the resulting FLV file. Also, when I play it back in Flash Player, in a browser or on Adobe Media Player, the video pauses at the start. It appears that Adobe Media Player waits for the progress bar to reach the end of the video before starting the playback - i.e. the video will load, the picture pauses, the progress bar seeks to the end as if the video were playing, then when it reaches the end the video picture starts. There is no audio on the video. I am noticing this in the video player I have built with Flash 8 using an FLVPlayback component and attached seekBar. The seek bar will start moving as if the video is playing but the picture remains paused.

    Here are some outputs from my FFMPEG log and the command I am using to encode the video.

    My FFMPEG command called from PHP :

    $cmd = 'ffmpeg -i ' . $sourcelocation.$filename.".".$fileext . '  -ab 96k -b 700k \
    -ar 44100 -s ' . $target['width'] . 'x' . $target['height'] . ' -ac 1 \
    -acodec libfaac ' . $destlocation.$filename.$ext_trans .' 2>&1';

    The output from my error log :

    FFmpeg version UNKNOWN, Copyright (c) 2000-2010 Fabrice Bellard, et al.
    built on Jan 22 2010 11:31:03 with gcc 4.1.2 20070925 (Red Hat 4.1.2-33)
    configuration: --prefix=/usr --enable-static --enable-shared --enable-gpl \
    --enable-nonfree --enable-postproc --enable-avfilter --enable-avfilter-lavf \
    --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm \
    --enable-libmp3lame --enable-libvorbis --enable-libx264
    libavutil     50. 7. 0 / 50. 7. 0
    libavcodec    52.48. 0 / 52.48. 0
    libavformat   52.47. 0 / 52.47. 0
    libavdevice   52. 2. 0 / 52. 2. 0
    libavfilter    1.17. 0 /  1.17. 0
    libswscale     0. 9. 0 /  0. 9. 0
    libpostproc   51. 2. 0 / 51. 2. 0

    Seems stream 0 codec frame rate differs from container frame rate: 119.88 (120000/1001) -> 59.94 (60000/1001)
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'uploads/video/60974_v1.mov':
     Metadata:
       major_brand     : qt  
       minor_version   : 0
       compatible_brands: qt  
       comment         : JVC GC-FM1
       comment-eng     : JVC GC-FM1
     Duration: 00:00:30.41, start: 0.000000, bitrate: 4158 kb/s
       Stream #0.0(eng): Video: h264, yuv420p, 640x480 [PAR 1:1 DAR 4:3], 4017 kb/s, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
       Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 128 kb/s
    Output #0, rawvideo, to 'uploads/video/60974_v1.jpg':
       Stream #0.0(eng): Video: mjpeg, yuvj420p, 320x240 [PAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 90k tbn, 59.94 tbc
    Stream mapping:
     Stream #0.0 -> #0.0
    Press [q] to stop encoding
    [h264 @ 0x8e67930]B picture before any references, skipping
    [h264 @ 0x8e67930]decode_slice_header error
    [h264 @ 0x8e67930]no frame!
    Error while decoding stream #0.0
    [h264 @ 0x8e67930]B picture before any references, skipping
    [h264 @ 0x8e67930]decode_slice_header error
    [h264 @ 0x8e67930]no frame!
    Error while decoding stream #0.0
    frame=    1 fps=  0 q=3.8 Lsize=      15kB time=0.02 bitrate=7271.4kbits/s dup=482 drop=0    
    video:15kB audio:0kB global headers:0kB muxing overhead 0.000000%

    Which are the important errors here ?

    B picture before any references, skipping ?
    decode_slice_header error ?
    no frame ?
    or
    Seems stream 0 codec frame rate differs from container frame rate : 119.88 (120000/1001) -> 59.94 (60000/1001)

  • When converting .mov to .flv video plays horizontally

    2 janvier 2014, par user291247

    When I record a video (.mov) through my iPhone it display vertically which is right.
    But after converting the .mov to .flv(using ffmpeg) it displays horizontally.

    My code :

    function convert_flv($vidtime,$infile, $outfile, $w = 0, $h = 0, $extra_infile = '', $extra_outfile = '') {
       $parms = '';
       if($w == 0 && $h == 0) {
           //$parms .= '-sameq ';
       } else {
           $parms = '-s {$w}x{$h} ';
       }

       if($vidtime==60) {
           $cmd = ffmpeg($infile, $outfile, $parms.' '.$extra_infile, '-t 00:01:00 -ar 22050 -r 15 -f flv  '.$extra_outfile);
       } else {
           $cmd = ffmpeg($infile, $outfile, $parms.' '.$extra_infile, '-t 00:04:00 -ar 22050 -r 15 -f flv  '.$extra_outfile);
       }

       print_r($cmd);
       return $cmd;
    }