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  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
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    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

Sur d’autres sites (3883)

  • avfilter/af_channelmap : Fix double-free of AVFilterChannelLayouts on error

    7 août 2020, par Andreas Rheinhardt
    avfilter/af_channelmap : Fix double-free of AVFilterChannelLayouts on error

    The query_formats function of the channelmap filter tries to allocate
    
a list of channel layouts which on success are attached to more permanent
    
objects (an AVFilterLink) for storage afterwards. If attaching succeeds,
    
the link becomes one of the common owners (in this case, the only owner)
    
of the list. Yet if the list has been successfully attached to the link
    
and an error happens lateron, the list was manually freed, which is wrong,
    
because it is owned by its link so that the link's pointer to the list will
    
become dangling and there will be a double-free/use-after-free when the link
    
is later cleaned up automatically.
    

    This commit fixes this by removing the custom freeing code ; this will
    
temporarily add a leaking codepath (if attaching the list fails, the list
    
will leak), but this will be fixed soon by making sure that an
    
AVFilterChannelLayouts without owner will be automatically freed when
    
attaching it to an AVFilterLink fails.
    

    Reviewed-by : Nicolas George <george@nsup.org>
    
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
    • [DH] libavfilter/af_channelmap.c

  • avfilter/vf_overlay : Fix double-free of AVFilterFormats on error

    7 août 2020, par Andreas Rheinhardt
    avfilter/vf_overlay : Fix double-free of AVFilterFormats on error

    The query_formats function of the overlay filter tries to allocate
    
two lists (only one in a special case) of formats which on success
    
are attached to more permanent objects (AVFilterLinks) for storage
    
afterwards. If attaching a list to an AVFilterLink succeeds, it is
    
in turn owned by the AVFilterLink (or more exactly, the AVFilterLink
    
becomes one of the common owners of the list). Yet if attaching a list
    
to one of its links succeeds and an error happens lateron, both lists
    
were manually freed, whic is wrong if the list is already owned by one
    
or more links ; these links' pointers to their lists will become dangling
    
and there will be a double-free/use-after-free when these links are
    
cleaned up automatically.
    

    This commit fixes this by removing the custom freeing code ; this will
    
temporarily add a leaking codepath (if attaching a list not already
    
owned by a link to a link fails, the list will leak), but this will
    
be fixed soon by making sure that an AVFilterFormats without owner will
    
be automatically freed when attaching it to an AVFilterLink fails.
    
Notice that at most one list leaks because a new list is only allocated
    
after the old list has been successfully attached to a link.
    

    Reviewed-by : Nicolas George <george@nsup.org>
    
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
    • [DH] libavfilter/vf_overlay.c

  • avfilter/vf_showpalette : Fix double-free of AVFilterFormats on error

    7 août 2020, par Andreas Rheinhardt
    avfilter/vf_showpalette : Fix double-free of AVFilterFormats on error

    The query_formats function of the showpalette filter tries to allocate
    
two lists of formats which on success are attached to more permanent objects
    
(AVFilterLinks) for storage afterwards. If attaching a list to an
    
AVFilterLink succeeds, the link becomes one (in this case the only one)
    
of the owners of the list. Yet if attaching the first list to its link
    
succeeds and attaching the second list fails, both lists were manually
    
freed, which means that the first link's pointer to the first list
    
becomes dangling and there will be a double-free when the first link is
    
cleaned up automatically.
    

    This commit fixes this by removing the custom free code ; this will
    
temporarily add a leaking codepath (if attaching a list to a link fails,
    
the list will leak), but this will be fixed shortly by making sure that
    
an AVFilterFormats without owner will be automatically freed when
    
attaching it to an AVFilterLink fails. Notice at most one list leaks
    
because as of this commit a new list is only allocated after the old list
    
has been successfully attached to a link.
    

    Reviewed-by : Nicolas George <george@nsup.org>
    
Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
    • [DH] libavfilter/vf_showpalette.c

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