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  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

  • Sélection de projets utilisant MediaSPIP

    29 avril 2011, par

    Les exemples cités ci-dessous sont des éléments représentatifs d’usages spécifiques de MediaSPIP pour certains projets.
    Vous pensez avoir un site "remarquable" réalisé avec MediaSPIP ? Faites le nous savoir ici.
    Ferme MediaSPIP @ Infini
    L’Association Infini développe des activités d’accueil, de point d’accès internet, de formation, de conduite de projets innovants dans le domaine des Technologies de l’Information et de la Communication, et l’hébergement de sites. Elle joue en la matière un rôle unique (...)

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  • How to stitch(concat) two transport stream with two different resolution and I-frame slices format without loosing resolution and slices information

    2 octobre 2019, par ART

    I have been trying to test a use case with steam captured from multimedia device and that didn't work. And then I have been trying to create this specific transport stream for like two days now without success, so requesting some help.

    



    I need to create transport stream with two different resolution and two different slicing format.

    



    I divided the task in following steps and in last two steps I need help.

    



    Step 1 : Download sample video with resolution : 1920x1080.
    
 I downloaded big buck bunny mp4 .

    



    Step 2 : Create transport stream with following
    
resolution : 1920x720, H264 I frame slices per frame : 1
    
I used following ffmpeg commands to do that.

    



    #Rename file to input.mp4
$ mv bbb_sunflower_1080p_30fps_normal.mp4 input.mp4
#Extract transport stream
$ ffmpeg -i input.mp4 -c copy first.ts


    



    first.ts is having 1980x720 resolution and one H264 I slice per frame.

    



    Step 3 : Create another transport stream with smaller resolution using following commands

    



    #Get mp4 with lower resolution.
$ ffmpeg -i input.mp4 -s 640x480 temp.mp4
#Extract trans port stream from mp4
$ ffmpeg -i temp.mp4 -c copy low_r.ts


    



    Step 4 : Edit(and re-encode ?) low_r.ts to have two H264 I frame slices.
I used following command to achieve it.

    



    $ x264 --slices 4 low_r.ts -o second.ts


    



    However when I play this second.ts on vlc using following command it doesn't play

    



    $ vlc ./second.ts 


    



    And using Elacard StreamEye software when I analyze the transport stream I see that it has 4 H264 I slices in only two times other than that lot of H264 p slices and H264 B slices. 
Need help here to figure out why second.ts doesn't play and why slicing is not correct.

    



    Step 5 : Combine both the transport stream without loosing resolution and slicing information.
Don't know command for this. Need help here.
I tried ffmpeg but that combines two stream with different resolution and makes one file with one resolution.

    



    Any suggestions/pointers would help me proceed. Let me also know if any of the above steps are not fine too.

    


  • avcodec/vc1 : Check for excessive resolution

    8 août 2019, par Michael Niedermayer
    avcodec/vc1 : Check for excessive resolution

    Fixes : overflow in aspect ratio calculation
    
Fixes : signed integer overflow : 393215 * 14594 cannot be represented in type 'int'
    
Fixes : 15728/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV3IMAGE_fuzzer-5661588893204480
    

    Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/vc1.c

  • avcodec/vqavideo : Limit resolution

    22 août 2019, par Michael Niedermayer
    avcodec/vqavideo : Limit resolution

    Fixes : Timeout (288sec -> 1ms)
    
Fixes : 16353/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VQA_fuzzer-5633402606190592
    

    Found-by : continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavcodec/vqavideo.c

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