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  • Configurer la prise en compte des langues

    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
    Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
    De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
    Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

Sur d’autres sites (5515)

  • avfilter/vf_deshake : replace qsort with AV_QSORT

    31 octobre 2015, par Ganesh Ajjanagadde
    avfilter/vf_deshake : replace qsort with AV_QSORT

    qsort is called indirectly in filter_frame, suggesting its performance
    
criticality. AV_QSORT is substantially faster due to the inlining of the
    
comparison callback. Thus, the increase in performance should be worth
    
the increase in binary size.
    

    This optimization is just a low hanging fruit. The trac ticket 1430 is
    
a request for an improved deshake filter.
    

    Sample benchmark (x86-64, Haswell, GNU/Linux) :
    
File : original from https://trac.ffmpeg.org/ticket/1430
    
command : ffmpeg -stream_loop 8 -i file.webm -vf deshake=rx=64:ry=64 -f null -
    

    Timer truncated at 1024 runs.
    
new :
    
28260 decicycles in qsort,       1 runs,      0 skips
    
35570 decicycles in qsort,       2 runs,      0 skips
    
39010 decicycles in qsort,       4 runs,      0 skips
    
46897 decicycles in qsort,       8 runs,      0 skips
    
40442 decicycles in qsort,      16 runs,      0 skips
    
41611 decicycles in qsort,      32 runs,      0 skips
    
40345 decicycles in qsort,      64 runs,      0 skips
    
38967 decicycles in qsort,     128 runs,      0 skips
    
38647 decicycles in qsort,     256 runs,      0 skips
    
40238 decicycles in qsort,     512 runs,      0 skips
    
39676 decicycles in qsort,    1024 runs,      0 skips
    

    old :
    
1740280 decicycles in qsort,       1 runs,      0 skips
    
 923560 decicycles in qsort,       2 runs,      0 skips
    
 511330 decicycles in qsort,       4 runs,      0 skips
    
 309720 decicycles in qsort,       8 runs,      0 skips
    
 194900 decicycles in qsort,      16 runs,      0 skips
    
 142686 decicycles in qsort,      32 runs,      0 skips
    
 112516 decicycles in qsort,      64 runs,      0 skips
    
  98166 decicycles in qsort,     128 runs,      0 skips
    
  88147 decicycles in qsort,     256 runs,      0 skips
    
  88706 decicycles in qsort,     512 runs,      0 skips
    
  86783 decicycles in qsort,    1024 runs,      0 skips
    

    Reviewed-by : Nicolas George <george@nsup.org>
    
Reviewed-by : Michael Niedermayer <michael@niedermayer.cc>
    
Signed-off-by : Ganesh Ajjanagadde <gajjanagadde@gmail.com>
    • [DH] libavfilter/vf_deshake.c

  • Most time effective web format for converting h.265

    29 avril 2020, par IamRichter

    So, I configured my ipcams to send event videos to a FTP server that saves it locally, and run a script that convert every video into something that can be opened in a generic browser, then send it to a S3 (I am using pyftpdlib + my modifications).

    &#xA;&#xA;

    But i don't think that I am doing it in the most effective way. On my computer (a fairly good laptop) it usually takes half the video playtime to convert into a mp4 using a generic ffmpeg command that i simple copy and paste from stackoverflow. I tried to look up the documentation, but i simple don't have the multimedia background to understand it.

    &#xA;&#xA;

    What would be the most time effective format and how to convert a raw h.265 video to it ?

    &#xA;

  • Revision 499fe05dc0 : optimize forward 16x16 DCT for accuracy This commit added pre/post scaling for

    23 février 2013, par Yaowu Xu

    Changed Paths : Modify /test/dct16x16_test.cc Modify /test/test.mk Modify /vp9/encoder/vp9_dct.c optimize forward 16x16 DCT for accuracy This commit added pre/post scaling for first half of fDCT16x16 to reduce error, by simulation of 100,000 blocks for random inputs, the average sse reduced from (...)

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