Recherche avancée

Médias (91)

Autres articles (103)

  • 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).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Gestion de la ferme

    2 mars 2010, par

    La ferme est gérée dans son ensemble par des "super admins".
    Certains réglages peuvent être fais afin de réguler les besoins des différents canaux.
    Dans un premier temps il utilise le plugin "Gestion de mutualisation"

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

Sur d’autres sites (9416)

  • avformat/utils : move side data merge after parser

    21 novembre 2013, par Michael Niedermayer
    avformat/utils : move side data merge after parser

    merging before the parser can conflict with the parser, also
    
future changes depend on it being done later
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavformat/utils.c

  • Damaged h264 stream not working with ffmpeg but working with vlc or mplayer

    15 avril 2013, par gregoiregentil

    I have a h264 file, coming from an rtsp stream, that is slightly damaged. Some frames are altered.

    ffmpeg reports :

    ffmpeg -i stream.mpg 
    
ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
    
  built on Apr  2 2013 17:00:59 with gcc 4.6.3
    
*** THIS PROGRAM IS DEPRECATED ***
    
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
    

    
Seems stream 0 codec frame rate differs from container frame rate: 180000.00 (180000/1) -> 90000.00 (180000/2)
    
Input #0, mpegts, from &#39;a.mpg&#39;:
    
  Duration: 00:03:18.84, start: 93370.745522, bitrate: 2121 kb/s
    
  Program 1 
    
    Stream #0.0[0x44](): Video: h264 (Baseline), yuv420p, 640x480, 90k tbr, 90k tbn, 180k tbc
    
At least one output file must be specified

    I can play the file with VLC or mplayer. Obviously, the damaged frames are "kind of blurred" but it's working. mplayer reports :

    mplayer stream.mpg
    
MPlayer2 UNKNOWN (C) 2000-2011 MPlayer Team
    
mplayer: could not connect to socket
    
mplayer: No such file or directory
    
Failed to open LIRC support. You will not be able to use your remote control.
    

    
Playing stream.mpg.
    
Detected file format: MPEG-2 transport stream format (libavformat)
    
[lavf] stream 0: video (h264), -vid 0
    
LAVF: Program 1 
    
VIDEO:  [H264]  640x480  0bpp  90000.000 fps    0.0 kbps ( 0.0 kbyte/s)
    
Load subtitles in .
    
[ass] auto-open
    
==========================================================================
    
Opening video decoder: [ffmpeg] FFmpeg&#39;s libavcodec codec family
    
Asking decoder to use 2 threads if supported.
    
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
    
==========================================================================
    
Audio: no sound
    
Starting playback...
    
V:   0.0   0/  0 ??% ??% ??,?% 0 0 
    
Movie-Aspect is undefined - no prescaling applied.
    
VO: [xv] 640x480 => 640x480 Planar YV12 
    
V:93370.7   0/  0 ??% ??% ??,?% 0 0 
    
No pts value from demuxer to use for frame!
    
Video pts after filters MISSING
    
V:93370.7   0/  0 ??% ??% ??,?% 0 0 
    
No pts value from demuxer to use for frame!
    
Video pts after filters MISSING
    
V:93370.7   0/  0 ??% ??% ??,?% 0 0 
    
No pts value from demuxer to use for frame!
    
Video pts after filters MISSING
    
V:93370.7   0/  0 ??% ??% ??,?% 0 0 
    
No pts value from demuxer to use for frame!
    
Video pts after filters MISSING
    
V:93370.7   0/  0 ??% ??% ??,?% 0 0 
    
No pts value from demuxer to use for frame!
    
Video pts after filters MISSING
    
V:93370.7   0/  0 ??% ??% ??,?% 0 0 
    
No pts value from demuxer to use for frame!
    
Video pts after filters MISSING
    
V:93370.7   0/  0 ??% ??% ??,?% 0 0 
    
No pts value from demuxer to use for frame!

    When I try to re-encode the file with :

    ffmpeg -i stream.mpg -fflags +genpts -an -vcodec mpeg4 -r 65535/2733 stream.mp4

    ffmpeg seems to jump over the altered frames. The length of stream.mp4 << length of stream.mpg

    How could I fix this problem, i.e. having ffmpeg to output something similar to what mplayer and vlc output ?

  • FFMPEG fails to find any files matching the regexp

    11 avril 2013, par dawe134

    I want to convert sequence of 40 images to a video. The problem is that ffmpeg could not find any of the inputs images matching the regexp in the command. What am I doing wrong please ?

    I ran the following commands :

    > ffmpeg -f image2 -i "img%0d.jpg" -vcodec mpeg4 -y -v "verbose" 07_seq_wire.avi 
    
*** THIS PROGRAM IS DEPRECATED ***
    
This program is only provided for compatibility and will be removed in a future release.    Please use avconv instead.
    
img%0d.jpg: No such file or directory
    

    

    
> ls -l
    
-rw-r--r-- 1 david david  69812 Apr 11 01:54 img01.jpg
    
-rw-r--r-- 1 david david  70858 Apr 11 01:54 img02.jpg
    
-rw-r--r-- 1 david david  71481 Apr 11 01:54 img03.jpg
    
-rw-r--r-- 1 david david  71528 Apr 11 01:54 img04.jpg
    
-rw-r--r-- 1 david david  71470 Apr 11 01:54 img05.jpg
    
-rw-r--r-- 1 david david  71534 Apr 11 01:54 img06.jpg
    
-rw-r--r-- 1 david david  70908 Apr 11 01:54 img07.jpg
    
-rw-r--r-- 1 david david  70633 Apr 11 01:54 img08.jpg
    
-rw-r--r-- 1 david david  70059 Apr 11 01:54 img09.jpg
    
-rw-r--r-- 1 david david  70021 Apr 11 01:54 img10.jpg
    
-rw-r--r-- 1 david david  69726 Apr 11 01:54 img11.jpg
    
-rw-r--r-- 1 david david  70896 Apr 11 01:54 img12.jpg
    
-rw-r--r-- 1 david david  72123 Apr 11 01:54 img13.jpg
    
-rw-r--r-- 1 david david  72605 Apr 11 01:54 img14.jpg
    
-rw-r--r-- 1 david david  73501 Apr 11 01:54 img15.jpg
    
-rw-r--r-- 1 david david  73743 Apr 11 01:54 img16.jpg
    
-rw-r--r-- 1 david david  74401 Apr 11 01:54 img17.jpg
    
-rw-r--r-- 1 david david  74697 Apr 11 01:54 img18.jpg
    
-rw-r--r-- 1 david david  75371 Apr 11 01:54 img19.jpg
    
-rw-r--r-- 1 david david  74802 Apr 11 01:54 img20.jpg
    
-rw-r--r-- 1 david david  74802 Apr 11 01:55 img21.jpg
    
-rw-r--r-- 1 david david  75371 Apr 11 01:55 img22.jpg
    
-rw-r--r-- 1 david david  74697 Apr 11 01:55 img23.jpg
    
-rw-r--r-- 1 david david  74401 Apr 11 01:55 img24.jpg
    
-rw-r--r-- 1 david david  73743 Apr 11 01:55 img25.jpg
    
-rw-r--r-- 1 david david  73501 Apr 11 01:55 img26.jpg
    
-rw-r--r-- 1 david david  72605 Apr 11 01:55 img27.jpg
    
-rw-r--r-- 1 david david  72123 Apr 11 01:55 img28.jpg
    
-rw-r--r-- 1 david david  70896 Apr 11 01:55 img29.jpg
    
-rw-r--r-- 1 david david  69726 Apr 11 01:55 img30.jpg
    
-rw-r--r-- 1 david david  70021 Apr 11 01:55 img31.jpg
    
-rw-r--r-- 1 david david  70059 Apr 11 01:55 img32.jpg
    
-rw-r--r-- 1 david david  70633 Apr 11 01:55 img33.jpg
    
-rw-r--r-- 1 david david  70908 Apr 11 01:55 img34.jpg
    
-rw-r--r-- 1 david david  71534 Apr 11 01:55 img35.jpg
    
-rw-r--r-- 1 david david  71470 Apr 11 01:55 img36.jpg
    
-rw-r--r-- 1 david david  71528 Apr 11 01:55 img37.jpg
    
-rw-r--r-- 1 david david  71481 Apr 11 01:55 img38.jpg
    
-rw-r--r-- 1 david david  70858 Apr 11 01:56 img39.jpg
    
-rw-r--r-- 1 david david  69812 Apr 11 01:56 img40.jpg

    Thanks for any help !

Navigation