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  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • 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 (...)

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  • How can i forcing current frame to be encoded as intra frame using libavcodec

    14 avril 2021, par pensir

    I want to change gop dynamic to adapt to player. Smaller gop help for reduce first screen cost ; Big gop help to reduce bitrate to save bandwidth.

    


    I found nvenc has a function which can solve the problem above.
https://docs.nvidia.com/video-technologies/video-codec-sdk/nvenc-video-encoder-api-prog-guide/#forcing-current-frame-to-be-encoded-as-intra-frame

    


    But I'm using ffmpeg. Is there any similar function in ffmpeg ?

    


  • Emphasis level map with ffmpeg using NVENC

    2 novembre 2020, par ofer rubinstein

    I am trying to have different compression levels, to different regions in the video.
ffmpeg has something called "addroi", but it's just a recommendation and doesn't guarantee the absolute level of compression.
Nvidia NVENC has something called Emphasis Level Map, I am hoping this will be able to achieve an accurate level of compression per region.

    


    I am unable to find how to do this via ffmpeg executable, so I am starting to try to do this using the ffmpeg SDK.
Do you have any idea how to do this via the ffmpeg.exe, instead of using the SDK ?

    


    Here is what I am talking about in the NVIDIA documentation :

    


    https://docs.nvidia.com/video-technologies/video-codec-sdk/nvenc-video-encoder-api-prog-guide/index.html#emphasis-map

    


  • Ffmpeg : Describing the audio data manually

    11 février 2015, par Dries

    I’m trying to manually create the packets from the audio that will be sent to the ffmpeg encoder. I’m trying to do this in the s16le format.

    I’m to write the audio after I’ve written the video frame like this :

    // Write a frame to the ffmpeg stream
    
fwrite(frame, sizeof(unsigned char*) * frameWidth * frameHeight, 1, ffmpeg); 
    

    
// Write multiple sound samples per written frame
    
for (int t = 0; t < 44100/24; ++t)
    
    fwrite(&audio, sizeof(short int), 1, ffmpeg);

    I think that this should be possible but I don’t know how to describe the audio without directly using the libavformat library that does this automatically.

    Is this possible ? If so, how do I describe the audio properly ? I’m currently getting integer values from a sine wave.

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