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  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Les sons

    15 mai 2013, par

  • Soumettre bugs et patchs

    10 avril 2011

    Un logiciel n’est malheureusement jamais parfait...
    Si vous pensez avoir mis la main sur un bug, reportez le dans notre système de tickets en prenant bien soin de nous remonter certaines informations pertinentes : le type de navigateur et sa version exacte avec lequel vous avez l’anomalie ; une explication la plus précise possible du problème rencontré ; si possibles les étapes pour reproduire le problème ; un lien vers le site / la page en question ;
    Si vous pensez avoir résolu vous même le bug (...)

Sur d’autres sites (5575)

  • Best Web Video Encoding Practices for IOS (FFMpeg)

    21 juin 2012, par MagicMushroom

    I am working on an online video repository system for a client, written mostly in PHP. At the moment I am building a mobile version of our desktop website. Our desktop site allows users to watch videos in the browser, much like YouTube.

    My client uploads videos through the manager interface I have created, and my application uses FFmpeg on the server to transcode his videos into several resolutions and bitrates. I am no expert on FFmpeg, and while I do not know the ins and outs of each individual setting, I do understand how it works as a whole. Right now, we are using the mp4 container format with the h.264 codec to encode our videos. Our command looks like :

    ffmpeg -y -i "INPUT FILE.mov" -f mp4 -s 640x480 -vcodec libx264 -preset fast -maxrate 1500 -bitrate 1000 -bufsize 4096 -acodec libfaac -ab 192 -ac 2 "OUTPUT_FILE.mp4" >> "FILE.log" 2>&1 &

    I'm hoping to gain information about best practices with encoding video for web streaming on IOS and other mobile devices using FFmpeg. What resolutions and settings make for good mobile streaming video ? How can I ensure maximum compatibility across the sea of Android devices ?

  • Revision 1e30547984 : Skip mode search based on reference frame consistency This commit enables the e

    12 août 2014, par Jingning Han

    Changed Paths :
     Modify /vp9/encoder/vp9_rdopt.c



    Skip mode search based on reference frame consistency

    This commit enables the encoder to skip NEARMV and ZEROMV if the
    above and left blocks have identical reference frame, and the
    current reference is different from that. It reduces the runtime
    of speed 3 for test sequences :
    bus cif at 1000 kbps 10064 ms -> 9823 ms
    pedestrian 1080p at 2000 kbps 193078 ms -> 189559 ms

    The compression performance is changed by
    derf -0.085%
    stdhd -0.103%

    Change-Id : If304f26d42e6412152a84c3dd7b02635c38444f4

  • Revision ccef8842d2 : Allow full coeff probability model and cost update This commit moves the simpli

    13 août 2014, par Jingning Han

    Changed Paths :
     Modify /vp9/encoder/vp9_speed_features.c



    Allow full coeff probability model and cost update

    This commit moves the simplified coefficient probability model
    and costing update to speed 4, and turns on chessboard pattern
    mode search for sub 720p sequences. The overall coding performance
    of speed 3 is improved :
    derf 0.889%
    stdhd 1.744%

    The speed 3 runtime for test sequences are improved :
    bus cif at 1000 kbps 9823 ms -> 9642 ms
    pedestrian 1080p 2000 kbps 189559 ms -> 183284 ms

    Change-Id : Iecbc7496a68f31fd49fb09f8dfd97c028d675a5d

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