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  • 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 (...)

  • Activation de l’inscription des visiteurs

    12 avril 2011, par

    Il est également possible d’activer l’inscription des visiteurs ce qui permettra à tout un chacun d’ouvrir soit même un compte sur le canal en question dans le cadre de projets ouverts par exemple.
    Pour ce faire, il suffit d’aller dans l’espace de configuration du site en choisissant le sous menus "Gestion des utilisateurs". Le premier formulaire visible correspond à cette fonctionnalité.
    Par défaut, MediaSPIP a créé lors de son initialisation un élément de menu dans le menu du haut de la page menant (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

Sur d’autres sites (10732)

  • Trouble with the ffmpeg -ss flag when capturing one frame from a Macbook iSight webcam

    1er mars 2014, par Andy

    For about five years I've used ffmpeg in a shell script to grab one frame from my linux'd-up Macbook's iSight :

    ffmpeg -f video4linux2 -s 640x480 -r 15 -i /dev/video0 -an -vframes 1 -vcodec mjpeg -y -sameq -ss 1.5 snapshot.jpg

    I just upgraded my Ubuntu distro from Lucid to Natty (ffmpeg ver. 0.6.2-4:0.6.2-1ubuntu1).
    Now that syntax turns the iSight on but hangs indefinitely.

    [output snipped, ending with:]
    
frame=    0 fps=  0 q=0.0 Lsize=      -0kB time=10000000000.00 bitrate=  -0.0kbits/s    
    
video:0kB audio:0kB global headers:0kB muxing overhead -inf%

    Without the '-ss' flag it seems to successfully grab the first frame and exit immediately - the only difference in output being :

    frame=    1 fps=  0 q=0.0 Lsize=      -0kB time=0.07 bitrate=  -2.6kbits/s    
    
video:16kB audio:0kB global headers:0kB muxing overhead -100.132730%

    However, the '-ss 1.5' was necessary to delay the frame capture by 1.5 seconds to allow the cam sufficient time to adjust the exposure.

    The -itsoffset flag seemed promising, but doesn't seem to change ffmpeg's behavior (ie doesn't hang, but no delay).

    Any ideas ?

  • Revision f872a98b1b : Adds speed 8 to vp9 as reference Adds a speed 8 to VP9 where only the nearestmv

    28 février 2014, par Deb Mukherjee

    Changed Paths :
     Modify /vp9/encoder/vp9_encodeframe.c


     Modify /vp9/encoder/vp9_onyx_if.c


     Modify /vp9/encoder/vp9_onyx_int.h


     Modify /vp9/encoder/vp9_pickmode.c


     Modify /vp9/encoder/vp9_rdopt.c



    Adds speed 8 to vp9 as reference

    Adds a speed 8 to VP9 where only the nearestmv (0 mv) is searched.
    This seems to be about the same speed as vp8 speed 5.

    Adds a new speed feature to disable inter modes based on a mask for
    each blocksize.

    Adds code for having lower complexity motion search methods
    in nonrd pick mode function, even though speed 7 still uses DIAMOND
    search for now.

    Also uses HEX search for speed 6 rather than FAST_HEX which improves
    psnr by 0.56% without any noticeable speed drop (tested on gipsmotion).

    Change-Id : Ic13176572dbd3aed5884a26786940a4b1bbd8a75

  • Revision 9c63e887e6 : cost_coefs approximation speed up This patch adds a new speed feature which doe

    3 mars 2014, par Jim Bankoski

    Changed Paths :
     Modify /vp9/encoder/vp9_onyx_if.c


     Modify /vp9/encoder/vp9_onyx_int.h


     Modify /vp9/encoder/vp9_rdopt.c



    cost_coefs approximation speed up

    This patch adds a new speed feature which doesn't do the rather
    expensive entropy context lookup or save to the table, while
    doing costing.

    The speed up on desktop36p.y4m is around 10% other clips much less.

    On the RTC test set this was + 1% in overall datarate.

    Change-Id : Ia5144bbf45270671e7be9c8e4055369909e2f738

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