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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Demande de création d’un canal

    12 mars 2010, par

    En fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
    Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...)

  • 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"

Sur d’autres sites (8909)

  • Tutorial on Using FFmepg on Qt [on hold]

    10 décembre 2014, par user3790147

    is there any proper tutorial on how to setup FFmpeg on Qt ?

    So far I followed this guide :
    http://ramu492.blogspot.sg/2013/06/porting-ffmpeg-on-to-winodws7-and.html

    but have run into unresolved external symbol errors.

  • ffmpeg cannot generate thumbnail [migrated]

    25 mars 2013, par Alex Flo

    I use ffmpeg to generate 10 .jpeg thumbs out of a video file. Most of the time it works fine but for some files (a 55seconds .mp4 for example) I get only the first 4 out of 10 captures, for the rest I get this error :
    Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)

    The command I use to convert is this one
    ffmpeg -ss 16 -i /path/source.mp4 -y -f image2 -t 0.001 -s 320*240 /path/thumb4.jpg
    where -ss value is a multiple of 4 and from 20 it stops working.

    Command line full output :

    `# ffmpeg -ss 77 -i /path/source.mp4 -y -f image2 -t 0.001 -s 320*240 /path/thumb7.jpg  
    
ffmpeg version git-2013-02-25-b8f6912 Copyright (c) 2000-2013 the FFmpeg developers  
    
  built on Feb 25 2013 15:18:21 with gcc 4.4.5 (Debian 4.4.5-8)  
    
  configuration: --enable-shared --enable-libx264 --enable-gpl  
    
  libavutil      52. 17.103 / 52. 17.103  
    
  libavcodec     54. 92.100 / 54. 92.100  
    
  libavformat    54. 63.100 / 54. 63.100  
    
  libavdevice    54.  3.103 / 54.  3.103  
    
  libavfilter     3. 41.100 /  3. 41.100  
    
  libswscale      2.  2.100 /  2.  2.100  
    
  libswresample   0. 17.102 /  0. 17.102  
    
  libpostproc    52.  2.100 / 52.  2.100  
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/path/source.mp4':  
    
  Metadata:  
    
    major_brand     : mp42  
    
    minor_version   : 19529845  
    
    compatible_brands: mp42isom  
    
    creation_time   : 2013-03-20 21:45:43  
    
  Duration: 00:02:04.62, start: 0.000000, bitrate: 605 kb/s  
    
    Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 64 kb/s  
    
    Metadata:  
    
      creation_time   : 2013-03-20 21:45:43  
    
      handler_name    : Sound Media Handler  
    
    Stream #0:1(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 720x480 [SAR 40:33 DAR 20:11], 983 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc  
    
    Metadata:  
    
      creation_time   : 2013-03-20 21:45:43  
    
      handler_name    : Video Media Handler  
    
Output #0, image2, to '/path/thumb7.jpg':  
    
  Metadata:  
    
    major_brand     : mp42  
    
    minor_version   : 19529845  
    
    compatible_brands: mp42isom  
    
    encoder         : Lavf54.63.100  
    
    Stream #0:0(eng): Video: mjpeg, yuvj420p, 320x240 [SAR 15:11 DAR 20:11], q=2-31, 200 kb/s, 90k tbn, 29.97 tbc  
    
    Metadata:
    
      creation_time   : 2013-03-20 21:45:43  
    
      handler_name    : Video Media Handler  
    
Stream mapping:  
    
  Stream #0:1 -> #0:0 (h264 -> mjpeg)  
    
Press [q] to stop, [?] for help  
    
frame=    0 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.00 bitrate=N/A      
    
video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead -inf%  
    
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)`  

  • FFmpeg returning an error - What does it mean ?

    19 mars 2013, par user1031947

    I am using FFmpeg, libmp3lame & libx264 along with the node fluent-ffmpeg module. This is my first foray into processing uploaded videos.

    From node, I use the following code to process an uploaded video :

    var proc = new ffmpeg({ source: src, nolog: true })
    
    .usingPreset( "podcast" )
    
    .withAudioCodec( "libmp3lame" )
    
    .saveToFile( dest, function( retcode, err ){
    
         if( err ) throw err;
    
         ...
    
    });

    When I try to process a video, this fails with the following error, which I don't understand. I am hoping someone here can help point me in the right direction. Thanks !

    > ffmpeg version 0.8.5-6:0.8.5-1, Copyright (c) 2000-2012 the Libav
    
> developers   built on Jan 13 2013 12:05:48 with gcc 4.7.2
    
> *** 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:
    
> 5994.00 (5994/1) -> 29.97 (2997/100) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
    
> '/home/ssp/resources/tmp/32111bf4217e87c23328ec81c56c7d02':  
    
> Metadata:
    
>     major_brand     : M4VP
    
>     minor_version   : 1
    
>     compatible_brands: M4VPM4A mp42isom
    
>     creation_time   : 2008-08-26 17:28:47   Duration: 00:00:08.01, start: 0.000000, bitrate: 944 kb/s
    
>     Stream #0.0(eng): Video: h264 (Constrained Baseline), yuv420p, 480x272, 815 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 5994 tbc
    
>     Metadata:
    
>       creation_time   : 2008-08-26 17:28:47
    
>     Stream #0.1(eng): Audio: aac, 44100 Hz, stereo, s16, 124 kb/s
    
>     Metadata:
    
>       creation_time   : 2008-08-26 17:28:47 [buffer @ 0xb685a0] w:480 h:272 pixfmt:yuv420p [scale @ 0xb63280] w:480 h:272 fmt:yuv420p ->
    
> w:320 h:176 fmt:yuv420p flags:0x4 [libx264 @ 0xb67c20] VBV maxrate
    
> unspecified, assuming CBR [libx264 @ 0xb67c20] using cpu capabilities:
    
> MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX [libx264 @ 0xb67c20]
    
> profile Main, level 1.3 Output #0, m4v, to
    
> '/home/ssp/resources/users/11/026468c8f4ea1beee0a585ebc2208137.m4v':  
    
> Metadata:
    
>     major_brand     : M4VP
    
>     minor_version   : 1
    
>     compatible_brands: M4VPM4A mp42isom
    
>     creation_time   : 2008-08-26 17:28:47
    
>     encoder         : Lavf53.21.1
    
>     Stream #0.0(eng): Video: libx264, yuv420p, 320x176, q=10-51, 512 kb/s, 90k tbn, 29.97 tbc
    
>     Metadata:
    
>       creation_time   : 2008-08-26 17:28:47
    
>     Stream #0.1(eng): Audio: libmp3lame, 44100 Hz, 1 channels, s16, 128 kb/s
    
>     Metadata:
    
>       creation_time   : 2008-08-26 17:28:47 Stream mapping:   Stream #0.0 -> #0.0   Stream #0.1 -> #0.1 Press ctrl-c to stop encoding frame=  240 fps=154 q=11.0 Lsize=     642kB time=7.97 bitrate=
    
> 659.3kbits/s     video:516kB audio:126kB global headers:0kB muxing overhead 0.000000% frame I:1     Avg QP:15.35  size:  9995 [libx264 @
    
> 0xb67c20] frame P:77    Avg QP:13.25  size:  5419 [libx264 @ 0xb67c20]
    
> frame B:162   Avg QP:18.31  size:   625 [libx264 @ 0xb67c20]
    
> consecutive B-frames:  2.5% 12.5% 30.0% 55.0% [libx264 @ 0xb67c20] mb
    
> I  I16..4:  9.1%  0.0% 90.9% [libx264 @ 0xb67c20] mb P  I16..4:  2.1% 
    
> 0.0%  2.8%  P16..4: 18.0% 29.9% 44.8%  0.0%  0.0%    skip: 2.3% [libx264 @ 0xb67c20] mb B  I16..4:  0.1%  0.0%  0.0%  B16..8: 35.2%
    
> 20.2%  1.9%  direct:14.5%  skip:28.1%  L0:26.3% L1:38.1% BI:35.6% [libx264 @ 0xb67c20] coded y,uvDC,uvAC intra: 83.7% 91.7% 84.7% inter:
    
> 27.7% 43.4% 13.9% [libx264 @ 0xb67c20] i16 v,h,dc,p: 20% 29% 42%  9% [libx264 @ 0xb67c20] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 29% 20%  4% 
    
> 8%  6%  9%  3%  4% [libx264 @ 0xb67c20] i8c dc,h,v,p: 60% 19% 16%  5%
    
> [libx264 @ 0xb67c20] Weighted P-Frames: Y:2.6% UV:0.0% [libx264 @
    
> 0xb67c20] ref P L0: 75.6% 13.5%  8.0%  2.8%  0.1% [libx264 @ 0xb67c20]
    
> ref B L0: 94.5%  5.5% [libx264 @ 0xb67c20] kb/s:528.00

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