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Autres articles (62)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Qualité du média après traitement

    21 juin 2013, par

    Le bon réglage du logiciel qui traite les média est important pour un équilibre entre les partis ( bande passante de l’hébergeur, qualité du média pour le rédacteur et le visiteur, accessibilité pour le visiteur ). Comment régler la qualité de son média ?
    Plus la qualité du média est importante, plus la bande passante sera utilisée. Le visiteur avec une connexion internet à petit débit devra attendre plus longtemps. Inversement plus, la qualité du média est pauvre et donc le média devient dégradé voire (...)

Sur d’autres sites (7468)

  • Can't write out flv file in openCV in Windows

    7 août 2015, par dev_nut

    I’m trying to write out a flv file in openCV 2.4.9 in Windows 8.1 and it seems this gives an error.

        [flv @ 05821a00] Tag FLV1/0x31564c46 incompatible with output codec id '22' ([2]
    
[0][0][0])

    After googling around, I noticed that I may have to recompile with ffmpeg support. I set up cmake (I’m a cmake noob) and did that. But, I didn’t change anything with regard to ffmpeg (like point to new libraries). I can’t seem to find a guide that would help me here.Is this the right way to go ? Would recompiling in this case, actually help at all ?

    • How do I solve this problem ?

  • Merge commit ’b114d28a18050b5ebd22fc067332e5487243889c’

    12 août 2015, par Hendrik Leppkes
    Merge commit ’b114d28a18050b5ebd22fc067332e5487243889c’

    * commit ’b114d28a18050b5ebd22fc067332e5487243889c’ :
    
  x86inc : warn when instructions incompatible with current cpuflags are used
    

    See a1684311b3de0766932c42b1ffdd59823d786bc2
    

    Merged-by : Hendrik Leppkes <h.leppkes@gmail.com>

  • gstreamer records

    13 octobre 2012, par Eric

    I use the following command to record audio and video from my webcam

    gst-launch-0.10 v4l2src ! video/x-raw-yuv,width=640,height=480,framerate=30/1 ! \
    
             tee name=t_vid ! queue ! videoflip method=horizontal-flip ! \
    
             xvimagesink sync=false t_vid. ! queue ! \
    
             videorate ! video/x-raw-yuv,framerate=30/1 ! queue ! mux. \
    
             autoaudiosrc ! audiorate ! audio/x-raw-int,rate=48000,channels=1,depth=16 ! queue ! \
    
             audioconvert ! queue ! mux. avimux name=mux ! \
    
             filesink location=video.avi

    And the result is correct in term of synchronicity between the flows. However the avi file is very big since that's uncompressed data...
    Could you advice me howto reduce the size of the records. Note that I after recording I split audio and video in separate files for processing. It is crucial to keep the synchronicity.

    * Edit *

    I tried to use ffmpeg to compress the avi files using this command :

    ffmpeg -i video.avi -vcodec msmpeg4v2 output.avi

    But it seems that bitrate is invalid (N/A since its raw data ?)
    Here is the output :

    Input #0, avi, from &#39;video.avi&#39;:
    
Duration: 00:00:00.00, start: 0.000000, bitrate: -2147483 kb/s
    
  Stream #0.0: Video: rawvideo, yuv420p, 640x480, 30 tbr, 30 tbn, 30 tbc
    
  Stream #0.1: Audio: pcm_s16le, 48000 Hz, 1 channels, s16, 768 kb/s
    
[buffer @ 0xef57e0] w:640 h:480 pixfmt:yuv420p
    
Incompatible sample format &#39;s16&#39; for codec &#39;ac3&#39;, auto-selecting format &#39;flt&#39;
    
[ac3 @ 0xedece0] channel_layout not specified
    
[ac3 @ 0xedece0] No channel layout specified. The encoder will guess the layout, but it     might be incorrect.
    
[ac3 @ 0xedece0] invalid bit rate
    
Output #0, avi, to &#39;output.avi&#39;:
    
  Stream #0.0: Video: msmpeg4v2, yuv420p, 640x480, q=2-31, 200 kb/s, 90k tbn, 30 tbc
    
  Stream #0.1: Audio: ac3, 48000 Hz, mono, flt, 200 kb/s
    
Stream mapping:
    
  Stream #0.0 -> #0.0
    
  Stream #0.1 -> #0.1
    
Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height

    Thanks for helping.

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