Recherche avancée

Médias (91)

Autres articles (67)

  • Participer à sa documentation

    10 avril 2011

    La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
    Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
    Pour ce faire, vous pouvez vous inscrire sur (...)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 est la première version de MediaSPIP stable.
    Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • Mise à disposition des fichiers

    14 avril 2011, par

    Par défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
    Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
    Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...)

Sur d’autres sites (6468)

  • Specify background colour when generating movie from images

    17 février 2014, par Uko

    I generate a video from png images using

    ffmpeg -i visualization/%d.png -c:v libx264 -vf "scale=500:trunc(ow/a/2)*2"  -pix_fmt yuv420p z.mov

    and if images have transparencies, they become black. Can I somehow make them white ?

  • overlay movie.mov over an image file using AVCONV OR FFMPEG

    6 février 2014, par user1087179

    I am trying to overlay transparent mov or flv over an image.

    I am open to both options using ffmpeg or avconv.

    here is my cmd :

    ffmpeg -i bg.png -i input.mov -vf \
    
'[0:v]setpts=PTS-STARTPTS, pad=iw*2:ih[bg]; \
    
[1:v]setpts=PTS-STARTPTS,scale=720:400[fg]; [bg][fg]overlay=w' -vf yadif -pix_fmt rgba     -y -vcodec qtrle -an output.mov

    I Get this :

    ffmpeg version 0.8.9-4:0.8.9-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers
    
  built on Nov  9 2013 19:08:00 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.
    
Input #0, image2, from '/home/socialvideos/public_html/public/images/blue_bg.png':
    
  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
    
    Stream #0.0: Video: png, rgb24, 720x400, 25 tbr, 25 tbn, 25 tbc
    
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/home/socialvideos/public_html/actor/opening/1.mov':
    
  Metadata:
    
    major_brand     : qt  
    
    minor_version   : 537199360
    
    compatible_brands: qt  
    
    creation_time   : 2014-01-22 18:12:38
    
  Duration: 00:00:09.28, start: 0.000000, bitrate: 119710 kb/s
    
    Stream #1.0(eng): Video: qtrle, bgra, 1280x720, 120236 kb/s, PAR 1280:1280 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc
    
    Metadata:
    
      creation_time   : 2014-01-22 18:12:38
    
    Stream #1.1(eng): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    
    Metadata:
    
      creation_time   : 2014-01-22 18:12:38
    
    Stream #1.2(eng): Data: tmcd / 0x64636D74, 0 kb/s
    
    Metadata:
    
      creation_time   : 2014-01-22 18:12:47
    
Incompatible pixel format 'rgba' for codec 'qtrle', auto-selecting format 'rgb24'
    
[buffer @ 0x10cf8c0] w:1280 h:720 pixfmt:bgra
    
[yadif @ 0x10c8980] mode:0 parity:-1 auto_enable:0
    
[avsink @ 0x10c8400] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed filter 0 yadif' and the filter 'out'
    
[yadif @ 0x10c8980] auto-inserting filter 'auto-inserted scaler 1' between the filter 'src' and the filter 'Parsed filter 0 yadif'
    
[scale @ 0x10cc9a0] w:1280 h:720 fmt:bgra -> w:1280 h:720 fmt:yuv420p flags:0x4
    
[scale @ 0x10cbdc0] w:1280 h:720 fmt:yuv420p -> w:1280 h:720 fmt:rgb24 flags:0x4
    
Output #0, mov, to 'out.mov':
    
  Metadata:
    
    encoder         : Lavf53.21.1
    
    Stream #0.0(eng): Video: qtrle, rgb24, 1280x720 [PAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 tbn, 25 tbc
    
    Metadata:
    
      creation_time   : 2014-01-22 18:12:38
    
Stream mapping:
    
  Stream #1.0 -> #0.0
    
Press ctrl-c to stop encoding
    
frame=    2 fps=  0 q=0.0 size=     654kB time=0.08 bitrate=66996.3kbits/s    
    
frame=    5 fps=  4 q=0.0 size=    1213kB time=0.20 bitrate=49692.2kbits/s    
    
frame=    8 fps=  4 q=0.0 size=    2068kB time=0.32 bitrate=52952.9kbits/s    
    
frame=   10 fps=  4 q=0.0 size=    2826kB time=0.40 bitrate=57880.0kbits/s    
    
frame=   12 fps=  4 q=0.0 size=    3621kB time=0.48 bitrate=61805.2kbits/s    
    
frame=   14 fps=  4 q=0.0 size=    4433kB time=0.56 bitrate=64846.9kbits/s    
    
frame=   17 fps=  4 q=0.0 size=    5598kB time=0.68 bitrate=67435.6kbits/s    
    
frame=   19 fps=  4 q=0.0 size=    6368kB time=0.76 bitrate=68643.7kbits/s    
    
frame=   21 fps=  4 q=0.0 size=    7145kB time=0.84 bitrate=69683.8kbits/s    
    
frame=   23 fps=  4 q=0.0 size=    7901kB time=0.92 bitrate=70352.7kbits/s    
    
frame=   26 fps=  4 q=0.0 size=    9179kB time=1.04 bitrate=72298.4kbits/s    
    
frame=   28 fps=  4 q=0.0 size=    9743kB time=1.12 bitrate=71260.9kbits/s    
    
frame=   30 fps=  4 q=0.0 size=   10562kB time=1.20 bitrate=72100.4kbits/s    
    
frame=   32 fps=  4 q=0.0 size=   11375kB time=1.28 bitrate=72802.4kbits/s    
    
frame=   34 fps=  4 q=0.0 size=   12162kB time=1.36 bitrate=73256.3kbits/s    
    
frame=   37 fps=  4 q=0.0 size=   13404kB time=1.48 bitrate=74190.5kbits/s    
    
frame=   39 fps=  4 q=0.0 size=   14080kB time=1.56 bitrate=73936.2kbits/s    
    
frame=   41 fps=  4 q=0.0 size=   14763kB time=1.64 bitrate=73744.3kbits/s    
    
frame=   44 fps=  4 q=0.0 size=   15690kB time=1.76 bitrate=73030.4kbits/s    
    
frame=   47 fps=  4 q=0.0 size=   16660kB time=1.88 bitrate=72595.6kbits/s    
    
frame=   49 fps=  4 q=0.0 size=   17418kB time=1.96 bitrate=72798.4kbits/s    
    
frame=   51 fps=  4 q=0.0 size=   18060kB time=2.04 bitrate=72524.8kbits/s    
    
frame=   54 fps=  4 q=0.0 size=   18805kB time=2.16 bitrate=71320.3kbits/s    
    
frame=   56 fps=  4 q=0.0 size=   19498kB time=2.24 bitrate=71305.2kbits/s    
    
frame=   58 fps=  4 q=0.0 size=   20178kB time=2.32 bitrate=71247.7kbits/s    
    
frame=   60 fps=  4 q=0.0 size=   20892kB time=2.40 bitrate=71310.3kbits/s    
    
frame=   63 fps=  4 q=0.0 size=   22028kB time=2.52 bitrate=71609.8kbits/s    
    
frame=   65 fps=  4 q=0.0 size=   22729kB time=2.60 bitrate=71613.6kbits/s    
    
frame=   68 fps=  4 q=0.0 size=   23827kB time=2.72 bitrate=71762.8kbits/s    
    
frame=   71 fps=  4 q=0.0 size=   24865kB time=2.84 bitrate=71724.5kbits/s    
    
frame=   74 fps=  4 q=0.0 size=   26029kB time=2.96 bitrate=72035.8kbits/s    
    
frame=   76 fps=  4 q=0.0 size=   26746kB time=3.04 bitrate=72074.2kbits/s    
    
frame=   79 fps=  4 q=0.0 size=   27642kB time=3.16 bitrate=71659.3kbits/s    
    
frame=   82 fps=  4 q=0.0 size=   28743kB time=3.28 bitrate=71787.0kbits/s    
    
frame=   85 fps=  4 q=0.0 size=   29929kB time=3.40 bitrate=72111.4kbits/s    
    
frame=   87 fps=  4 q=0.0 size=   30602kB time=3.48 bitrate=72037.4kbits/s    
    
frame=   89 fps=  4 q=0.0 size=   31242kB time=3.56 bitrate=71892.2kbits/s    
    
frame=   92 fps=  4 q=0.0 size=   32091kB time=3.68 bitrate=71437.1kbits/s    
    
frame=   95 fps=  4 q=0.0 size=   32972kB time=3.80 bitrate=71080.2kbits/s    
    
frame=   98 fps=  4 q=0.0 size=   34038kB time=3.92 bitrate=71132.0kbits/s    
    
frame=  101 fps=  4 q=0.0 size=   35037kB time=4.04 bitrate=71046.2kbits/s    
    
frame=  104 fps=  4 q=0.0 size=   35901kB time=4.16 bitrate=70697.3kbits/s    
    
frame=  107 fps=  4 q=0.0 size=   36980kB time=4.28 bitrate=70780.7kbits/s    
    
frame=  109 fps=  4 q=0.0 size=   37800kB time=4.36 bitrate=71022.0kbits/s    
    
frame=  111 fps=  4 q=0.0 size=   38488kB time=4.44 bitrate=71011.5kbits/s    
    
frame=  114 fps=  4 q=0.0 size=   39415kB time=4.56 bitrate=70808.9kbits/s    
    
frame=  117 fps=  4 q=0.0 size=   40404kB time=4.68 bitrate=70725.0kbits/s    
    
frame=  119 fps=  4 q=0.0 size=   41076kB time=4.76 bitrate=70691.3kbits/s    
    
frame=  121 fps=  4 q=0.0 size=   41885kB time=4.84 bitrate=70892.5kbits/s    
    
frame=  123 fps=  4 q=0.0 size=   42622kB time=4.92 bitrate=70967.6kbits/s    
    
frame=  125 fps=  4 q=0.0 size=   43368kB time=5.00 bitrate=71054.0kbits/s    
    
frame=  127 fps=  4 q=0.0 size=   44161kB time=5.08 bitrate=71214.6kbits/s    
    
frame=  130 fps=  4 q=0.0 size=   45070kB time=5.20 bitrate=71002.5kbits/s    
    
frame=  132 fps=  4 q=0.0 size=   45782kB time=5.28 bitrate=71032.2kbits/s    
    
frame=  134 fps=  4 q=0.0 size=   46599kB time=5.36 bitrate=71220.3kbits/s    
    
frame=  136 fps=  4 q=0.0 size=   47270kB time=5.44 bitrate=71183.8kbits/s    
    
frame=  138 fps=  4 q=0.0 size=   47865kB time=5.52 bitrate=71034.5kbits/s    
    
frame=  140 fps=  4 q=0.0 size=   48449kB time=5.60 bitrate=70874.3kbits/s    
    
frame=  142 fps=  4 q=0.0 size=   49013kB time=5.68 bitrate=70689.4kbits/s    
    
frame=  144 fps=  4 q=0.0 size=   49613kB time=5.76 bitrate=70560.8kbits/s    
    
frame=  147 fps=  4 q=0.0 size=   50683kB time=5.88 bitrate=70610.9kbits/s    
    
frame=  149 fps=  4 q=0.0 size=   51231kB time=5.96 bitrate=70417.5kbits/s    
    
frame=  151 fps=  4 q=0.0 size=   51734kB time=6.04 bitrate=70166.0kbits/s    
    
frame=  153 fps=  4 q=0.0 size=   52097kB time=6.12 bitrate=69734.9kbits/s    
    
frame=  155 fps=  4 q=0.0 size=   52591kB time=6.20 bitrate=69487.4kbits/s    
    
frame=  157 fps=  4 q=0.0 size=   53374kB time=6.28 bitrate=69624.1kbits/s    
    
frame=  159 fps=  4 q=0.0 size=   54086kB time=6.36 bitrate=69665.9kbits/s    
    
frame=  161 fps=  4 q=0.0 size=   54805kB time=6.44 bitrate=69715.3kbits/s    
    
frame=  163 fps=  4 q=0.0 size=   55574kB time=6.52 bitrate=69826.0kbits/s    
    
frame=  166 fps=  4 q=0.0 size=   56683kB time=6.64 bitrate=69932.4kbits/s    
    
frame=  168 fps=  4 q=0.0 size=   57421kB time=6.72 bitrate=69999.1kbits/s    
    
frame=  170 fps=  4 q=0.0 size=   58230kB time=6.80 bitrate=70150.4kbits/s    
    
frame=  173 fps=  4 q=0.0 size=   59357kB time=6.92 bitrate=70268.0kbits/s    
    
frame=  176 fps=  4 q=0.0 size=   60482kB time=7.04 bitrate=70378.7kbits/s    
    
frame=  179 fps=  4 q=0.0 size=   61346kB time=7.16 bitrate=70187.7kbits/s    
    
frame=  181 fps=  4 q=0.0 size=   62171kB time=7.24 bitrate=70345.9kbits/s    
    
frame=  184 fps=  4 q=0.0 size=   63299kB time=7.36 bitrate=70454.0kbits/s    
    
frame=  186 fps=  4 q=0.0 size=   64031kB time=7.44 bitrate=70502.6kbits/s    
    
frame=  188 fps=  4 q=0.0 size=   64701kB time=7.52 bitrate=70482.4kbits/s    
    
frame=  191 fps=  4 q=0.0 size=   65731kB time=7.64 bitrate=70479.9kbits/s    
    
frame=  194 fps=  4 q=0.0 size=   66823kB time=7.76 bitrate=70543.2kbits/s    
    
frame=  197 fps=  4 q=0.0 size=   67568kB time=7.88 bitrate=70243.5kbits/s    
    
frame=  200 fps=  4 q=0.0 size=   68378kB time=8.00 bitrate=70018.6kbits/s    
    
frame=  203 fps=  4 q=0.0 size=   69112kB time=8.12 bitrate=69724.5kbits/s    
    
frame=  205 fps=  4 q=0.0 size=   69872kB time=8.20 bitrate=69804.1kbits/s    
    
frame=  207 fps=  4 q=0.0 size=   70548kB time=8.28 bitrate=69798.2kbits/s    
    
frame=  210 fps=  4 q=0.0 size=   71469kB time=8.40 bitrate=69699.4kbits/s    
    
frame=  213 fps=  4 q=0.0 size=   72386kB time=8.52 bitrate=69599.5kbits/s    
    
frame=  216 fps=  4 q=0.0 size=   73281kB time=8.64 bitrate=69480.8kbits/s    
    
frame=  219 fps=  4 q=0.0 size=   74241kB time=8.76 bitrate=69427.7kbits/s    
    
frame=  222 fps=  4 q=0.0 size=   75010kB time=8.88 bitrate=69198.2kbits/s    
    
frame=  225 fps=  4 q=0.0 size=   75861kB time=9.00 bitrate=69050.0kbits/s    
    
frame=  227 fps=  4 q=0.0 Lsize=   76442kB time=9.08 bitrate=68966.0kbits/s    
    
video:76439kB audio:0kB global headers:0kB muxing overhead 0.003299%

    However the video generated does not have background image and have white color instead. please help..

  • Increase the bitrate tolerance of ffmpeg for creating screenshots of a movie

    21 septembre 2012, par rekire

    I'm getting the error bitrate tolerance too small for bitrate so far no problem. I know that there are several switches to increase that but nothing works.

    ffmpeg -y -r 1/30 -b:v 999999k -bt 999999k -maxrate 999999k -i in.flv out%03d.jpg

    The source of that commandline is directly from ffmpeg. But that crashes :

    ffmpeg version N-44123-g5d55830 Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Sep  2 2012 20:23:29 with gcc 4.7.1 (GCC)
    
  [...]
    
Input #0, flv, from 'in.flv':
    
  Duration: 00:05:00.13, start: 0.000000, bitrate: 259 kb/s
    
    Stream #0:0: Video: flv1, yuv420p, 320x240, 1k tbr, 1k tbn, 1k tbc
    
    Stream #0:1: Audio: nellymoser, 22050 Hz, mono, s16
    
[mjpeg @ 04356860] bitrate tolerance too small for bitrate
    
[mjpeg @ 04317540] ff_frame_thread_encoder_init failed
    
Output #0, image2, to 'out%03d.jpg':
    
    Stream #0:0: Video: mjpeg, yuvj420p, 320x240, q=2-31, 200 kb/s, 90k tbn, 0.03 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (flv -> mjpeg)
    
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

    Some ideas what I'm doing wrong ?

Navigation