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  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • 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 (...)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

Sur d’autres sites (15018)

  • Saving Uncompressed Video Files using OpenCv, Gstreamer, and/or FFMPEG ?

    21 septembre 2022, par adav0033

    I have been trying to implement the cv::VideoWriter function from OpenCV to generate a an uncompressed video file. I started this because of a statement within the OpenCV Documentation which I will link here along with the statement.

    


    cv::VideoWriter::VideoWriter    (   const String &  filename,
int     fourcc,
double  fps,
Size    frameSize,
bool    isColor = true 
)       


    


    "If FFMPEG is enabled, using codec=0 ; fps=0 ; you can create an uncompressed (raw) video file."

    


    Ref. https://docs.opencv.org/3.4/dd/d9e/classcv_1_1VideoWriter.html

    


    However whilst troubleshooting the function I came across the refuting statement,

    


    " VideoCapture and VideoWriter do not provide interface to access raw compressed video stream, except maybe MJPEG in some cases.
Make sure you actually use FFmpeg backend by setting apiPreference parameter : VideoWriter("outfile.avi", cv2.CAP_FFMPEG, ...)"

    


    Ref. https://github.com/opencv/opencv/issues/14573

    


    I am now confused about how I go about writing the cv::VideoWriter function to satisfy the requirements to create an uncompressed video file (.avi) and if it is even possible. If it is not possible how do I achieve the outcome of saving an raw uncompressed video file, as I assume it would use some combination of FFMPEG, OpenCV,or Gstreamer.

    


    Note : My code is implemented in c++

    


  • Saving Raw Uncompressed Video Files using OpenCv, Gstreamer, and/or FFMPEG ?

    20 septembre 2022, par adav0033

    I have been trying to implement the cv::VideoWriter function from OpenCV to generate a an uncompressed (raw) video file. I started this because of a statement within the OpenCV Documentation which I will link here along with the statement.

    


    cv::VideoWriter::VideoWriter    (   const String &  filename,
int     fourcc,
double  fps,
Size    frameSize,
bool    isColor = true 
)       


    


    "If FFMPEG is enabled, using codec=0 ; fps=0 ; you can create an uncompressed (raw) video file."

    


    Ref. https://docs.opencv.org/3.4/dd/d9e/classcv_1_1VideoWriter.html

    


    However whilst troubleshooting the function I came across the refuting statement,

    


    " VideoCapture and VideoWriter do not provide interface to access raw compressed video stream, except maybe MJPEG in some cases.
Make sure you actually use FFmpeg backend by setting apiPreference parameter : VideoWriter("outfile.avi", cv2.CAP_FFMPEG, ...)"

    


    Ref. https://github.com/opencv/opencv/issues/14573

    


    I am now confused about how I go about writing the cv::VideoWriter function to satisfy the requirements to create a raw uncompressed video file (.avi) and if it is even possible. If it is not possible how do I achieve the outcome of saving an raw uncompressed video file, as I assume it would use some combination of FFMPEG, OpenCV,or Gstreamer.

    


    Note : My code is implemented in c++

    


  • avcodec/amfenc : Implement async_depth option

    7 novembre 2024, par Cameron Gutman
    avcodec/amfenc : Implement async_depth option

    This option, which is also available on other FFmpeg hardware encoders,
    
allows the user to trade throughput for reduced output latency. This is
    
useful for ultra low latency applications like game streaming.
    

    Signed-off-by : Cameron Gutman <aicommander@gmail.com>
    • [DH] libavcodec/amfenc.c
    • [DH] libavcodec/amfenc_av1.c
    • [DH] libavcodec/amfenc_h264.c
    • [DH] libavcodec/amfenc_hevc.c

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