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Autres articles (98)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 is the first MediaSPIP stable release.
    Its official release date is June 21, 2013 and is announced here.
    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 (...)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

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  • Extracting image frames from mjpeg given 'frame byte offset' and 'frame size' [on hold]

    2 septembre 2015, par Sonia

    I’m looking for code or pointers to funtions or library that I can use to extract image frames from motion jpeg file. In my case, for each image frame, I know the starting byte offset and the size of the frame (size is not always equal for each frame). Given these data, how can I extract each image frames from mjpeg file.

    I have checked the OpenCV library, I can’t find the detail about giving these two inputs to extract frames. Also, I can’t find it in FFmpeg as well. But, I’m not an expert in these two. I hope anyone could give me pointers to this. It can be just a tool or sourcecode (I use C/C++ and MATLAB but I’m open to other language - just to learn how to do it)

    Thank you very much.

  • ffmpeg concatenate with dynamic chunks

    28 octobre 2015, par vongolashu

    The ffmpeg docs for concat lists the following way
    ffmpeg -f concat -i mylist.txt -c copy output

    The mylist.txt file contains file like
    file ’/path/to/file1’
    file ’/path/to/file2’
    file ’/path/to/file3’

    What I am looking is for a way to do this concat in a persistent way where the number of files can keep increasing, for example in livestreaming
    I will be sending chunks of video (mp4 files) of 10 seconds each to my server and want to concat/stitch them together to output to a RTMP stream (for livestreaming)

    If concat is not the proper way to do this, please suggest alternatives.

    Really interested to know how people use the above concept (I hope its how it works) to send video chunks from mobile device for livestreaming

  • H.264 / H.265 Compression of a single Bitmap-Image

    3 septembre 2015, par kevf

    I hope someone can help me.

    I started researching different compression methods to compress Bitmap-Images lossless and lossy. The first methods i used were JPEG, JPEG-2000 and JPEG-XR. Now i want to compare these "standard" ones with H.264 and H.265, maybe they perform as well as they do for video compression.

    I tried using ffmpeg, but i can’t find out which parameters i need, there are plenty... So maybe someone can help me or link me to an Article/Howto or something else ?!

    Thanks a lot !

    EDIT :

    I used the following command :
    ffmpeg -i 01.bmp -c:v libx264 -preset veryslow -crf 40 test.avi

    but this created an 7kb file from an 76,8 kb input file... not very good compression ratio... is there any possibility to achieve more ?

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