Recherche avancée

Médias (33)

Mot : - Tags -/creative commons

Autres articles (105)

  • Publier sur MédiaSpip

    13 juin 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

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • 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 (8939)

  • Gstreamer video increases latency with decreased FPS

    19 novembre 2024, par Ri Di

    I am using RPI 5 to stream the video :

    


    rpicam-vid -t 0 --camera 0 --nopreview --mode 2304:1296:10:P --codec yuv420 
           --width 640 --height 360 --framerate 10 --rotation 0 
           --autofocus-mode manual --inline --listen -o - | 
     ffmpeg -f rawvideo -pix_fmt yuv420p -s:v 640x360 -r 10 -i /dev/stdin 
            -c:v libx264 -preset ultrafast -tune zerolatency -maxrate 300k 
            -bufsize 50k -g 30000 -f mpegts tcp://192.168.0.147:1234


    


    View it with :

    


    gst-launch-1.0 -v tcpserversrc host=0.0.0.0 port=1234 ! queue ! 
    tsdemux ! h264parse ! avdec_h264 ! videorate ! video/x-raw,framerate=10/1 !  
    videoconvert ! autovideosink sync=false


    


    Problem is that with 10 FPS I get around 2s of latency ! While 56 or 120 FPS results in below 300ms latency.

    


    Is the problem in sender or reader side ? Or both ?

    


    I am not planning to use the 10 FPS, its only for demonstration of problem. But I would like to get lower latency at 56 FPS - just like at 120 FPS (around 80-100 ms difference) or maybe even better, as it seems to get lower with higher FPS.

    


    Maybe there is some kind of buffering parameter which holds frames ?

    


    (of course, when testing with higher FPS I change both numbers in sender and the one in reader command. The camera is v3 RPI official)

    


    Also I'd like to mention that same thing happens with ffplay :

    


    ffplay -i -probesize 3000 tcp://0.0.0.0:1234/?listen


    


  • Automated Video creation for Graphic Data using Java or Python [on hold]

    20 mars 2016, par Amit

    enter image description here

    Chart Shows what I am trying to achieve. bottom line is that I want to create a video from a dataset which provides me enough data points to plot bar/pie graphs. I also want to add a audio to it for which text is created programatically. I need help for -

    • I have tried using jfreeChart. But when create an image from it, the quality of it is not good enough to create video from that image. Is there any other better options to plot nice graphs and create images from it ? Idea is to save these charts/images on disk, mix audio using ffmpeg utility to finally create a video.

    I would prefer something using Java / Python since I already know it.

  • Revision 066ed601a5 : Merge "Don't waste time partitioning skip superblocks."

    9 mars 2015, par Alex Converse

    Merge "Don’t waste time partitioning skip superblocks."

Navigation