Recherche avancée

Médias (91)

Autres articles (97)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • ANNEXE : Les plugins utilisés spécifiquement pour la ferme

    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

Sur d’autres sites (8824)

  • Opening the ALSA microphone port using libavformat

    17 mai 2013, par Kartik Aiyer

    I'm writing a fairly simple application to open the microphone port using the ALSA format on a linux VM. I'm trying to do this using libavformat and other ffmpeg libs ( avutil, avcodec, etc ).

    I followed what ffmpeg was doing ( ffmpeg_opt.c : open_input_file) to open the actual microphone port( hw:0,0). I find the ALSA format using av_find_input_format( "alsa" ) which returns with a AVInputFormat* object.

    I then use this with avformat_open_input.
    I didn't precreate AVFormatContext and load it with any params before the above call ( I rely on it being created in avformat_open_input). This worked and I was able to read packets of the port. However, after a while I was not able to open the port. I added a bunch of debug in the libs and find out that :
    avformat_open_input -> init_input -> ... -> avio_open2 -> ffurl_open ->ffurl_alloc
    the final call to ffurl_alloc goes through all the protocols and tries to see if hw matches any given protocol. This fails.

    I was wondering if anyone has tried opening a mic with the ALSA format using libavformat and other libs, and if they have any tips on how to get this done. Specifically how does ffmpeg translate something like hw:0,0 to the actual device port ?

    P.S : I tried the following line on the command line app
    ffmpeg -f alsa -i hw:0,0 -ac 2 -acodec pcm_s16le output.aac
    this worked for a while and then suddenly stopped working as well with the same kind of problem. Unable to open the protocol.

    I'm not sure what changed and why its not able to open the audio port, but any advice on how also port are opened with the rather different handle of HW:x,x would be much appreciated.

    Alternatively, I realize ffmpeg is a little heavy to just read PCM packets and then encode and I could use a more direct approach by using the aac libs directly. Can anyone recommend a lib or kernel driver that I can use to open the microphone ( given that it is an ALSA card )and read PCM data out of it. ( I'm new to LInux so please forgive me if any of this sounds trivial )

    Thanks
    Kartik

  • lavfi : port mcdeint filter from libmpcodecs

    28 mai 2013, par Stefano Sabatini
    lavfi : port mcdeint filter from libmpcodecs
    • [DH] LICENSE
    • [DH] configure
    • [DH] doc/filters.texi
    • [DH] libavfilter/Makefile
    • [DH] libavfilter/allfilters.c
    • [DH] libavfilter/version.h
    • [DH] libavfilter/vf_mcdeint.c

  • Changelog : mention the port of various mp PP filters

    13 janvier 2015, par Stefano Sabatini
    Changelog : mention the port of various mp PP filters
    • [DH] Changelog

Navigation