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Autres articles (98)

  • 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 (...)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • 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 (...)

Sur d’autres sites (9998)

  • Bitrate choice for h265 codec if CRF NOT Supported,MEDIA_CODEC [closed]

    5 septembre 2023, par strider

    How to choose optimal bitrate for encoding to a h265 codec, if h265 codec does NOT support any kind of CRF option ?

    


    I believe the codec supports variable bitrate.

    


    Is there an optimal ratio between bitrates of x264/XVID and h265 codecs ?
I.e. is there a general coefficient that I could multiply given x264 average bitrate to get h265 bitrate ?
(I guess we will have to assume a certain h265 preset here). Let the preset be medium or default for this question.

    


    Usually its for long-term storage and to reduce file size.

    


    Specifically I'm talking about hardware h265/HEVC MEDIA_CODEC for Android and FFMPEG. I'm just learning it, but it does not seem to have many options (does it support PRESET ?).
Any real life sample encoding FFMPEG command for hardware h265 MEDIA_CODEC with FFMPEG (e.g. for a movie) would be very helpful.

    


    Is there a reference table for h265 bitrates for common video formats like Bluray, etc ?

    


    Is there a way to output average video track bitrate with FFMPEG or other free tool ? (usually its x264 or mpeg2).

    


    Unfortunately there's no non-android device I currently have with hardware h265 encoding support or with a multicore CPU.

    


  • How to Buffer Audio Streams for an Android Internet Radio Application

    16 février 2014, par burakk

    We have a radio application that streams MP3 over HTTP using an instance of the MediaPlayer class. In devices running new Android versions (i.e, Note 3 running Android 4.3), the music plays for about half a second, and then waits (buffers ?) for up to 10 seconds, and plays again. I guess this unwanted behavior is due to the increased buffer size of the MediaPlayer in newer Android versions. Since there's no way to set the buffer size, there are few options left :

    • Stream Proxy
    • AudioTrack + MP3 Decoder
    • OpenSL

    I have read many posts about those, and concluded that the best way would be using AudioTrack with an MP3 decoder like FFMPEG. However, I am open to suggestions and any guidances since I do not have any knowledge about Android NDK, JNI and FFMPEG...

  • Revision 60456083e9 : Do joint motion search iteratively Allow motion search multiple times iterative

    11 mai 2013, par Yunqing Wang

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



    Do joint motion search iteratively

    Allow motion search multiple times iteratively, and break out
    the loop if this search couldn't find better motion vectors.
    Limit the maximum number of search to 2.

    Tests results :
    1. stdhd set : 0.311%(overall psnr) ; 0.346%(ssim).
    positive gain on 10 out of 16 clips(best : 2.746% on sunflower ;
    worst : -0.434% on old_town_cross).
    2. derf set : 0.016%(overall psnr) ; 0.062%(ssim).
    positive gain on half of the clips(best : 0.499% on bowing ;
    worst : -0.387 on city).

    Change-Id : Ibf0a51776d4caf7707be0586346db08128117559

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