Recherche avancée

Médias (91)

Autres articles (108)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

Sur d’autres sites (10928)

  • Frame Accurate Seeking in WebM

    11 janvier 2016, par SapphireSun

    I’m trying to do a somewhat tricky thing with WebM. I am trying to encode a stack of 256 biological images as a WebM. The time dimension of motion is very similar to the space dimension of the image stack so the compression ratios are insanely good. However, I am having trouble decoding the movie frames. I know that WebM uses an IPB predictive coding scheme, but I was reading several blog posts and discussion groups from WHATWG from 2011, and they said that frame accurate seeking was working in Chrome at that time.

    When I do video.currentTime = 0, I correctly get this :

    tissue slice at time zero

    However, if I do video.currentTime = 0.34 (for example) I get something that looks like this :

    enter image description here

    It looks like I’m getting a random poorly predicted frame. Am I just encoding the video wrong ? When I play it normally it looks fine.

    I encoded the video using 256 pngs using ffmpeg compiled with libvpx using the VP8 codec.

    ffmpeg -y -framerate 60 -start_number 0 -pattern_type glob -i '*.png' -qmin 10 -qmax 42 out.webm

    References to the WHATWG and some other info from 2011 :

    WHATWG discusses frame accuracy :

    https://lists.w3.org/Archives/Public/public-whatwg-archive/2011Jan/0372.html

    BBC Tech Director talking about frame accuracy :

    http://www.bbc.co.uk/blogs/bbcinternet/2011/02/frame_accurate_video_in_html5.html

  • dsputil : Split audio operations off into a separate context

    16 janvier 2014, par Diego Biurrun
    dsputil : Split audio operations off into a separate context
    • [DBH] configure
    • [DBH] libavcodec/Makefile
    • [DBH] libavcodec/ac3enc.c
    • [DBH] libavcodec/ac3enc.h
    • [DBH] libavcodec/ac3enc_fixed.c
    • [DBH] libavcodec/ac3enc_float.c
    • [DBH] libavcodec/ac3enc_template.c
    • [DBH] libavcodec/acelp_pitch_delay.c
    • [DBH] libavcodec/acelp_pitch_delay.h
    • [DBH] libavcodec/arm/Makefile
    • [DBH] libavcodec/arm/audiodsp_arm.h
    • [DBH] libavcodec/arm/audiodsp_init_arm.c
    • [DBH] libavcodec/arm/audiodsp_init_neon.c
    • [DBH] libavcodec/arm/audiodsp_neon.S
    • [DBH] libavcodec/arm/dsputil_init_neon.c
    • [DBH] libavcodec/arm/dsputil_neon.S
    • [DBH] libavcodec/audiodsp.c
    • [DBH] libavcodec/audiodsp.h
    • [DBH] libavcodec/cook.c
    • [DBH] libavcodec/dsputil.c
    • [DBH] libavcodec/dsputil.h
    • [DBH] libavcodec/ppc/Makefile
    • [DBH] libavcodec/ppc/audiodsp.c
    • [DBH] libavcodec/ppc/dsputil_altivec.h
    • [DBH] libavcodec/ppc/dsputil_ppc.c
    • [DBH] libavcodec/takdec.c
    • [DBH] libavcodec/x86/Makefile
    • [DBH] libavcodec/x86/audiodsp.asm
    • [DBH] libavcodec/x86/audiodsp.h
    • [DBH] libavcodec/x86/audiodsp_init.c
    • [DBH] libavcodec/x86/audiodsp_mmx.c
    • [DBH] libavcodec/x86/dsputil.asm
    • [DBH] libavcodec/x86/dsputil_init.c
    • [DBH] libavcodec/x86/dsputil_mmx.c
    • [DBH] libavcodec/x86/dsputil_x86.h

  • Summer Hacking 2011

    28 avril 2011, par Multimedia Mike — General

    I recently learned that iD — you know, the famed game company — has a series of summer tech camps :



    All I care to know is : Where were programs like these when I was 7-18 years old ? Born too early, I tell ya.

    That reminds me that the Google Summer of Code, 2011 Edition is getting underway soon. I guess it’s like summertime computer camp for college-aged students. FFmpeg / libav is once again a part of the program with 10 slots awarded by Google. Here are the students, projects, and mentors.

    Wish them luck.

Navigation