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  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • 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 (...)

  • MediaSPIP Player : problèmes potentiels

    22 février 2011, par

    Le lecteur ne fonctionne pas sur Internet Explorer
    Sur Internet Explorer (8 et 7 au moins), le plugin utilise le lecteur Flash flowplayer pour lire vidéos et son. Si le lecteur ne semble pas fonctionner, cela peut venir de la configuration du mod_deflate d’Apache.
    Si dans la configuration de ce module Apache vous avez une ligne qui ressemble à la suivante, essayez de la supprimer ou de la commenter pour voir si le lecteur fonctionne correctement : /** * GeSHi (C) 2004 - 2007 Nigel McNie, (...)

Sur d’autres sites (10299)

  • copy step written on stackoverflow to install FFMPEG on wamp not working

    17 septembre 2019, par user3833682

    I’m working on project for converting youtube videos into mp3 format and found this also to install ffmpeg on wamp server Install FFMPEG on WAMP and try other links also but ffmpeg extension is not installing so I also checked it at phpinfo to confirm its installed or not but not installed and I’ve windows 7 64, wampserver 2.4, apache 2.4.4 and php version is 5.4.12 I don’t know what am I missing, I spent my 6 hours to figure out but extension of ffmpeg is not installed yet please tell me what am I doing wrong ?

    Now after that I’m getting popup message twice when I start wamp server `PHP Startup : Unable to load dynamic library

    c :/wamp/bin/php/php5.4.12/ext/php_ffmpeg.dll’ - %1 is not a valid
    Win32 application.

    enter image description here

  • Capture video from webcam using ffmpeg - finish streaming without any data to written it

    7 septembre 2017, par Robert

    I have webcam in my computer and ffmpeg 3.3.0
    I run this command :

    ffmpeg -y -f vfwcap -r 25 -i 0 out1.mp4

    I have no errors but the output file is empty.

    c:\..\bin>ffmpeg -y -f vfwcap -r 25 -i 0 out1.mp4
    
ffmpeg version N-87130-g2b9fd15 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 7.1.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --e
    
nable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --
    
enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv
    
--enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-li
    
bfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug -
    
-enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enabl
    
e-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-li
    
bsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolam
    
e --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
    
 --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable
    
-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
    
  libavutil      55. 74.100 / 55. 74.100
    
  libavcodec     57.104.100 / 57.104.100
    
  libavformat    57. 79.100 / 57. 79.100
    
  libavdevice    57.  8.100 / 57.  8.100
    
  libavfilter     6.101.100 /  6.101.100
    
  libswscale      4.  7.103 /  4.  7.103
    
  libswresample   2.  8.100 /  2.  8.100
    
  libpostproc    54.  6.100 / 54.  6.100
    
Input #0, vfwcap, from '0':
    
  Duration: N/A, bitrate: N/A
    
    Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 640x480, 25 fps,
    
1k tbr, 1k tbn, 1k tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
Finishing stream 0:0 without any data written to it.
    
[libx264 @ 00000000004f5160] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
    
AVX FMA3 BMI2 AVX2
    
[libx264 @ 00000000004f5160] profile High 4:2:2, level 3.0, 4:2:2 8-bit
    
[libx264 @ 00000000004f5160] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC cod
    
ec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 r
    
ef=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed
    
_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pski
    
p=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 deci
    
mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_
    
adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=2
    
5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.6
    
0 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'out1.mp4':
    
  Metadata:
    
    encoder         : Lavf57.79.100
    
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv422p, 640x480, q=
    
-1--1, 25 fps, 12800 tbn, 25 tbc
    
    Metadata:
    
      encoder         : Lavc57.104.100 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=
    
 0x
    
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing ove
    
rhead: unknown
    
Exiting normally, received signal 2.
    

    
c:\..\bin>

    My operating system is Windows 7.

  • mp4 video written with ffmpeg has different first frame based on total number of frames

    26 janvier 2023, par Nitzan Weissman

    I'm trying to read and write videos using ffmpeg, and I got an interesting phenomenon where the first frame is not the same in videos I create that are made from the same frames, only with different lengths.

    


    The commands I'm running to reproduce the problem :

    


    ffmpeg -i .mp4 -frames:v 20 -q:v 3 resource_images/00%04d.png

ffmpeg -hide_banner -loglevel error -framerate 30 -y -i resource_images/00%04d.png  -c:v libx264 -pix_fmt yuv420p -frames:v 20 long_video.mp4 -y

ffmpeg -hide_banner -loglevel error -framerate 30 -y -i resource_images/00%04d.png  -c:v libx264 -pix_fmt yuv420p -frames:v 10 short_video.mp4 -y

ffmpeg -i long_video.mp4 -vf "select=eq(n,0)" -q:v 3 long_frame0.png -y

ffmpeg -i short_video.mp4 -vf "select=eq(n,0)" -q:v 3 short_frame0.png -y


    


    The images long_frame0.png and short_frame0.png are different (I loaded them using Python and compared them, there are many differences).

    


    I find it very peculiar, since I create very short videos, it's those videos first frames, and they are keyframes of those videos (I checked it using ffprobe)

    


    What is the cause of this issue and how do I overcome it to create a consistent first frame for a video, regardless of the video length ?

    


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