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  • Publier sur MédiaSpip

    13 June 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Ajouter notes et légendes aux images

    7 February 2011, by

    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 (...)

  • Supporting all media types

    13 April 2011, by

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats: images: png, gif, jpg, bmp and more audio: MP3, Ogg, Wav and more video: AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data: OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

On other websites (2819)

  • encode YUV420 frame to VP9

    21 November 2018, by User800222

    As title,

    I’m pulling frames from a IP camera. I converted the input raw data to YUV420 format, and would like to encode YUV420 to VP9, and save frames as .webm format. Would I be able to do that? Or should I input a BGR444 format for encoding?

    BTW, to set up the parameters for encoding vp9. Is the av_dict_set() the right function for setting parameters?

    Ex: (http://wiki.webmproject.org/ffmpeg/vp9-encoding-guide)

    av_dict_set(&opt, "crf"    , "23", 0);
    
av_dict_set(&opt, "speed"  , "4" , 0);
    
av_dict_set(&opt, "threads", "8" , 0);
    
av_dict_set(&opt, "pass"   , "1" , 0);
    
av_dict_set(&opt, "b:v", "1400k", 0);

    Edit: The wiki uses 2 pass for setting parameters, would I be able to do in with 1 pass?

    Edit2: Blow code seems to be working, wonder how can I bring the size of the videos (vp9) down? Currently, I have similar size as using h264 encoder.

        av_dict_set(&opt, "crf"    ,        "45", 0);  
    
    av_dict_set(&opt, "speed"  ,        "8" , 0); 
    
    av_dict_set(&opt, "quality",        "realtime", 0);
    
    av_dict_set(&opt, "threads",        "8" , 0);
    
    av_dict_set(&opt, "tile-columns",   "3", 0);
    
    av_dict_set(&opt, "frame-parallel", "1", 0);
    
    av_dict_set(&opt, "row-mt",         "1", 0);

    Update1:
    YUV420P can be encoded as VP9!

  • ffmpeg invalid argument for vp9 encoding

    17 June 2015, by user3083672

    I’m following the recommended settings for vp9 encoding here: http://wiki.webmproject.org/ffmpeg/vp9-encoding-guide

    Using this command:

    ffmpeg -i test.mp4 -c:v libvpx-vp9 -pass 1 -b:v 1000K -threads 8 -speed 4 \
    
-tile-columns 6 -frame-parallel 1 -auto-alt-ref 1 -lag-in-frames 25 \
    
-an -f webm /dev/null

    produces the following error:

    [NULL @ 0000000005a209c0] Unable to find a suitable output format for '\'
    
\: Invalid argument

    Any ideas?

  • C# Desktop recorder h.264 cross-"computer"

    14 December 2013, by rodi

    I was looking for a method with "least requirements" for a maximum compatibility.

    I have seen that there are mainly 2 ways: through directx, through .NET ( only >Win7) but both requires Win7 Or DirectX 9 installed.

    could ffmpeg be useful? I have tried following this Wiki, but it prompts me:

    > ffmpeg -f dshow -i video="UScreenCapture":audio="Microphone" output.flv
    

    
[dshow @ 00000000003ea700] Could not find video device.
    
video=UScreenCapture: Input/output error

    Any advice?

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