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Autres articles (67)

  • 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.

  • MediaSPIP Player : les contrôles

    26 mai 2010, par

    Les contrôles à la souris du lecteur
    En plus des actions au click sur les boutons visibles de l’interface du lecteur, il est également possible d’effectuer d’autres actions grâce à la souris : Click : en cliquant sur la vidéo ou sur le logo du son, celui ci se mettra en lecture ou en pause en fonction de son état actuel ; Molette (roulement) : en plaçant la souris sur l’espace utilisé par le média (hover), la molette de la souris n’exerce plus l’effet habituel de scroll de la page, mais diminue ou (...)

  • MediaSPIP version 0.1 Beta

    16 avril 2011, par

    MediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

Sur d’autres sites (10117)

  • lavc/libvpxenc : handle queue desync more gracefully

    28 février 2023, par Anton Khirnov
    lavc/libvpxenc : handle queue desync more gracefully

    If the packets returned by libvpx and our internal frame properties
    
queue get desynchronized for some reason (should not happen, but it is
    
not clear libvpx API guarantees this), we will keep adding to the queue
    
indefinitely and never remove anything.
    

    Change the code to drain the queue even if timestamps do not match.
    • [DH] libavcodec/libvpxenc.c

  • screen recording and video encoding with ffmpeg

    2 septembre 2016, par Alexander M.

    1.we need to record screenshots into video with 2-3 fps. Quality - the minimum possible to make text on the screen readable, 256 colors. It is important to reduce the output video file size as much as possible.

    2.we’ve made a lot of tests, and currently the most suitable way is to make screenshots every 300-500msec, save them in PNG, then run ffmpeg to encode to H.267 with these params :

    ffmpeg -f image2 -i "C:\png5min\image%04d.png" -y -an -vcodec libx264 -preset veryfast -crf 30 "C:\output.mp4"

    3.is it the best way to get minimum output size with 2-3fps screencast ?

    4.the output file plays very quickly, codec by default concerns that images represent 25fps. But they are 2fps actually.
    Ok, but if we try to decrease the output frame rate, output file size increases for about twice !! (from 3mb to 6mb for a 3m:26s video). And if we set the output frame rate as 2 - video does not play frames at all or plays just 2 frames for 3mins... :

    -r 2 -f image2 -i "C:\png5min\image%04d.png" -y -an -vcodec libx264 -preset veryfast -crf 30 -r 2 "C:\image5min_2fps_crf30_test__R2-2.mp4"

    so, how can we just add some latency after each frame without increasing the output file size ???

  • screen recording and video encoding with ffmpeg

    2 septembre 2016, par Alexander M.

    1.we need to record screenshots into video with 2-3 fps. Quality - the minimum possible to make text on the screen readable, 256 colors. It is important to reduce the output video file size as much as possible.

    2.we’ve made a lot of tests, and currently the most suitable way is to make screenshots every 300-500msec, save them in PNG, then run ffmpeg to encode to H.267 with these params :

    ffmpeg -f image2 -i "C:\png5min\image%04d.png" -y -an -vcodec libx264 -preset veryfast -crf 30 "C:\output.mp4"

    3.is it the best way to get minimum output size with 2-3fps screencast ?

    4.the output file plays very quickly, codec by default concerns that images represent 25fps. But they are 2fps actually.
    Ok, but if we try to decrease the output frame rate, output file size increases for about twice !! (from 3mb to 6mb for a 3m:26s video). And if we set the output frame rate as 2 - video does not play frames at all or plays just 2 frames for 3mins... :

    -r 2 -f image2 -i "C:\png5min\image%04d.png" -y -an -vcodec libx264 -preset veryfast -crf 30 -r 2 "C:\image5min_2fps_crf30_test__R2-2.mp4"

    so, how can we just add some latency after each frame without increasing the output file size ???

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