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    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
    Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)

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    5 septembre 2013, par

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  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
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Sur d’autres sites (9312)

  • FFMPEG - changing pixel format from 24-bit RGB to 8-bit Grayscale does not change file size

    26 septembre 2018, par Minjun Seong

    I am using the avlib* libraries and currently using the sws_getContext function to change pixel format from RGB (AV_PIX_FMT_RGB24) to grayscale (AV_PIX_FMT_GRAY8). The expected behavior should have been that the output file size should have decreased by 3 times, but it stayed the same. Furthermore, when I checked on Media-Coder to see the format, the video format was still RGB. Any ideas on why the file size didn’t change and why the file format is still RGB ?

    Note : the video DID change to black and white as expected.

  • FFMPEG - changing pixel format from 24-bit RGB to 8-bit Grayscale only changes color, but not file size

    27 septembre 2018, par Minjun Seong

    I am using the avlib* libraries and currently using the sws_getContext function to change pixel format from RGB (AV_PIX_FMT_RGB24) to grayscale (AV_PIX_FMT_GRAY8). The expected behavior should have been that the output file size should have decreased by 3 times as we are going from 24 bit rgb to 8 bit grayscale, but it stayed the same. Furthermore, when I checked on Media-Coder to see the format, the video format was still RGB. Any ideas on why the file size didn’t change and why the file format is still RGB ?

    Note : the video DID change to black and white as expected.

  • Push RTSP over HTTP

    27 juin 2017, par Type11

    I need to make an emulator of cameras we have streaming to a video recording platform we created.

    The camera I am trying to emulate makes use of RTSP over http (well https but we can ignore that for now) which is somewhat normal but it doesn’t do the pull variety it does a push (we give the camera a url and it starts pushing to the video recording server).

    I have been using ffmpeg which has an rstp over http implementation but it is the pull kind where you take the client and give it a url to pull from.

    I have hacked around and gotten it to send an http GET as expected with the right headers we expect in it which our server uses and recognizes then it times out before streaming anything which makes sense as I think it is waiting for our server to send something.

    I could keep going down this path but I wanted to know if anyone else had run into this and if there was any prebuilt java, c, or c++ library that does anything like this I could start from ? I have searched around but most everything appears to be for a pull model.

    this is a capture of what the camera is sending (there is more but it is just more of the video stream below). this is the full tcp conversation.

    RTSP/1.0 200 OK
    Host : 192.168.1.9
    User-Agent : RS/E060660C84EB
    Content-Type : application/octet-stream
    X-SDP : 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
    X-Precapture : 8
    Authorization : Basic QXZ3R3VhbXpRcG15eUx3anlGYlZQS1ZCL2hoc1prWXltVVo0Q3cwb2FHaWZSWlBrNmhSRkVySFZoUkoxSG9lVjo2SWZTQ3VyYVRVT0FoU2RmVkJLdDBnQUFBQUFBQUFBQUFBQUFBQUFBQUFBaVNyTFFzK2tJNEVISVB5ZG9aL1Vu

    $...........}..|.....?.....a..@.P..    ..c.0.....<.>H ......Zas...AQZ...:.?W..A..q2..~.C..4.7....H’....*.....6 ?...........K.k.q...S.e+[g.......o... ..C1_[....N..........?.q.9.s..>..Gk.........[....&....n ;c..0c....#.A...9
    ......q...]...B...W.....8.".    ...[..\c(..?Z.F !. 9. ..e...

    %..0.p2.h.0.,.'g.Rf.\s......@j. .....0.............H.V
    .K{EL
    M.ig..;i...PS..?..~HR..?ID>....T.Ie.m....
    .....!..hBk..P-uX.V&...^<.ab....s....|.#.z...e..O+.{.!.0code>b..Q._d...z.......l.

    ...

    Any help on a library that might send a stream like this would be appreciated.

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