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Autres articles (80)

  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

  • MediaSPIP version 0.1 Beta

    16 avril 2011, par

    MediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Pour avoir une installation fonctionnelle, 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 (...)

Sur d’autres sites (5357)

  • AR Drone 2.0 video streaming whitout SDK on iOS

    10 janvier 2014, par JosephITA

    I'm coding an app for iOS that interact with the AR Drone 2.0 without using the SDK (poor documentation on the iPhone example).
    At the moment I can send command and receive navdata.
    I have no idea in how to receive video streaming. I know that is an H.264 stream and that I can use ffmpeg, but I'm not sure that this solution will pass the Apple revision.
    Any ideas ?

  • Why frame->pts increases by 20, rather than by 1 ?

    19 mars 2013, par user1914692

    Following the exmaples of ffmpeg : decoding_encoding.c and filtering_video.c, I process one video file taken by iPhone. The video file : .mov, video dimensions ; 480x272, video Codec : H.264/AVC, 30 frames per second, bitrate : 605 kbps.

    I first extract each frame, which is YUV.
    I convert YUV to RGB24, and process the RGB24, then write the RGB24 to a .ppm file. It shows the .ppm file is correct.

    Then I plan to encode processed RGB24 frames to a video file.
    Since MPEG does not support RGB24 picture format, I used AV_CODEC_ID_HUFFYUV.
    But the output video file (showing 18.5 MB) does not play. Movie Player on Ubuntu claims an error : Could not determine type of stream.
    I also tried it on VCL. It simply does not work, without any error information.

    My second questions is :
    For each extracted fram from the input video file, I get its pts as follows according to filtering_video.c :

    frame->pts = av_frame_get_best_effort_timestamp(frame);

    I print out each frame's pts, and find that it increases by 20, like below :

    pFrameRGB_count: 0,  frame->pts: 0
    
pFrameRGB_count: 1,  frame->pts: 20
    
pFrameRGB_count: 2,  frame->pts: 40
    
pFrameRGB_count: 3,  frame->pts: 60

    Where frame is the extracted frame from the input video, and pFrameRGB_count is the count for processed frame in RGB24 form.

    Why are they wrong ?

  • Rails : Encoder error when converting video using FFMPEG on Heroku

    2 janvier 2013, par andmcgregor

    I'm trying to upload a video and convert the file to mp4 and reduce the file size using the paperclip-ffmpeg and paperclip gems. Everything works fine running a local server and I'm only getting this problem on heroku. I have ffmpeg installed in vendor/ffmpeg/ (I followed these steps : https://gist.github.com/3963576). Here is the code I've got and the error I'm getting :

    models/video.rb :

    class Video < ActiveRecord::Base
    
  attr_accessible :content, :user_id, :video
    
  has_attached_file :video , :styles => { 
    
    :medium => { :geometry => "500x500", :format => 'mp4',
    
        :convert_options => { :output => { :vcodec => 'libx264',
    
        :b => '1000k', :bt => '200k',
    
        :acodec => 'libfaac', :ab => '56k', :ac => 2 } } }
    
  }, :processors => [:ffmpeg]
    

    
  belongs_to :user
    
end

    when I run heroku logs :

    2013-01-02T00:38:20+00:00 app[web.1]: Started POST "/videos" for 101.170.255.251 at 2013-01-02 00:38:20 +0000
    
2013-01-02T00:38:20+00:00 app[web.1]: Processing by VideosController#create as HTML
    
2013-01-02T00:38:20+00:00 app[web.1]:   Parameters: {"utf8"=>"✓", "authenticity_token"=>"X0IKts46TF8aFvEb1I/szFo/28omlVBXIIyJ3APz3YA=", "video"=>{"content"=>"", "video"=>#quicktime\r\n", @tempfile=#tmp/RackMultipart20130102-2-1ch9zcp>>}, "commit"=>"Post"}
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] ffmpeg -i "/tmp/sample20130102-2-4j5sgh.mov" 2>&1
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Resize
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Command Success
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Making...
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Building Destination File: 'sample20130102-2-4j5sgh' + 'mp4'
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Destination File Built
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Adding Source
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Adding Geometry
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Convert Options: 500x280
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Adding Format
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] -i :source -y -vcodec libx264 -b 1000k -bt 200k -acodec libfaac -ab 56k -ac 2 -s 500x280 :dest
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Extracting Target Dimensions
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Building Parameters
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Target Size is Available
    
2013-01-02T00:38:20+00:00 app[web.1]: [paperclip] [ffmpeg] Keeping Aspect Ratio
    
2013-01-02T00:38:20+00:00 app[web.1]: Command :: ffmpeg -i '/tmp/sample20130102-2-4j5sgh.mov' -y -vcodec libx264 -b 1000k -bt 200k -acodec libfaac -ab 56k -ac 2 -s 500x280 '/tmp/sample20130102-2-4j5sgh20130102-2-1mr35ix.mp4'
    
2013-01-02T00:38:20+00:00 app[web.1]: ffmpeg version git-2013-01-01-d079d1d Copyright (c) 2000-2012 the FFmpeg developers
    
2013-01-02T00:38:20+00:00 app[web.1]:   built on Jan  1 2013 12:59:49 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5)
    
2013-01-02T00:38:20+00:00 app[web.1]:   configuration: --enable-shared --disable-asm --prefix=/app/vendor/ffmpeg
    
2013-01-02T00:38:20+00:00 app[web.1]:   libavfilter     3. 30.102 /  3. 30.102
    
2013-01-02T00:38:20+00:00 app[web.1]:   libavcodec     54. 85.100 / 54. 85.100
    
2013-01-02T00:38:20+00:00 app[web.1]:   libavdevice    54.  3.102 / 54.  3.102
    
2013-01-02T00:38:20+00:00 app[web.1]:   libavutil      52. 13.100 / 52. 13.100
    
2013-01-02T00:38:20+00:00 app[web.1]:   libswresample   0. 17.102 /  0. 17.102
    
2013-01-02T00:38:20+00:00 app[web.1]:   libswscale      2.  1.103 /  2.  1.103
    
2013-01-02T00:38:20+00:00 app[web.1]:   libavformat    54. 58.100 / 54. 58.100
    
2013-01-02T00:38:21+00:00 app[web.1]:     creation_time   : 2013-01-02 00:36:58
    
2013-01-02T00:38:21+00:00 app[web.1]:     minor_version   : 0
    
2013-01-02T00:38:21+00:00 app[web.1]:     major_brand     : qt  
    
2013-01-02T00:38:21+00:00 app[web.1]: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/sample20130102-2-4j5sgh.mov':
    
2013-01-02T00:38:21+00:00 app[web.1]:     model           : iPhone 4
    
2013-01-02T00:38:21+00:00 app[web.1]:     compatible_brands: qt  
    
2013-01-02T00:38:21+00:00 app[web.1]:     model-eng       : iPhone 4
    
2013-01-02T00:38:21+00:00 app[web.1]:     make-eng        : Apple
    
2013-01-02T00:38:21+00:00 app[web.1]:     date-eng        : 2012-12-28T00:39:34+1100
    
2013-01-02T00:38:21+00:00 app[web.1]:     encoder         : 6.0
    
2013-01-02T00:38:21+00:00 app[web.1]:     encoder-eng     : 6.0
    
2013-01-02T00:38:21+00:00 app[web.1]:   Duration: 00:00:00.03, start: 0.000000, bitrate: 9465 kb/s
    
2013-01-02T00:38:21+00:00 app[web.1]:     Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 75 kb/s
    
2013-01-02T00:38:21+00:00 app[web.1]:     date            : 2012-12-28T00:39:34+1100
    
2013-01-02T00:38:21+00:00 app[web.1]:       creation_time   : 2013-01-02 00:36:58
    
2013-01-02T00:38:21+00:00 app[web.1]:     make            : Apple
    
2013-01-02T00:38:21+00:00 app[web.1]:   Metadata:
    
2013-01-02T00:38:21+00:00 app[web.1]:     Metadata:
    
2013-01-02T00:38:21+00:00 app[web.1]:       handler_name    : Core Media Data Handler
    
2013-01-02T00:38:21+00:00 app[web.1]:     Stream #0:1(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 8605 kb/s, 30 fps, 30 tbr, 600 tbn, 1200 tbc
    
2013-01-02T00:38:21+00:00 app[web.1]:     Metadata:
    
2013-01-02T00:38:21+00:00 app[web.1]:       handler_name    : Core Media Data Handler
    
2013-01-02T00:38:21+00:00 app[web.1]: Unknown encoder 'libx264'
    
2013-01-02T00:38:21+00:00 app[web.1]: Please use -b:a or -b:v, -b is ambiguous
    
2013-01-02T00:38:21+00:00 app[web.1]:       creation_time   : 2013-01-02 00:36:58
    
2013-01-02T00:38:21+00:00 app[web.1]: [paperclip] An error was received while processing: #
    
2013-01-02T00:38:21+00:00 app[web.1]:   Rendered videos/new.html.erb within layouts/application (3.2ms)
    
2013-01-02T00:38:21+00:00 heroku[router]: at=info method=POST path=/videos host=stark-sea-5654.herokuapp.com fwd=101.170.255.251 dyno=web.1 queue=0 wait=0ms connect=3ms service=3685ms status=200 bytes=1878
    
2013-01-02T00:38:21+00:00 app[web.1]:   Rendered layouts/_footer.html.erb (0.0ms)
    
2013-01-02T00:38:21+00:00 app[web.1]: Completed 200 OK in 342ms (Views: 124.8ms | ActiveRecord: 10.4ms)
    
2013-01-02T00:38:21+00:00 app[web.1]:   Rendered layouts/_header.html.erb (1.2ms)

    Everything works fine until the message Unknown encoder 'libx264' so I'm thinking it's something to do with ffmpeg perhaps ?

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