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  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • 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 (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

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  • ffmpeg convert one png to DNxHD

    15 mars 2019, par bcvery1

    I’m trying to create a DNxHD file from one PNG file. The output should be "24000/1001" fps, 1920x1080, using the dnxhd codec. Every frame should be the same. The outputted stream must be 20 seconds in length.

    I have a solution which uses filter_complex to loop the PNG for each frame, however this results in extremely large files. Given that I will be combining possibly multiple hundred DNxHD files into one AAF file, the output file size is too large.

    Is there any improvement I can make on the command below which would achieve this file size reduction ?

    ffmpeg -i INFILE.png -y -nostdin -an -vcodec dnxhd -pix_fmt yuv422p -vb 36M  -framerate 24000/1001 -filter_complex loop=479:1:0 OUFILE.dnxhd

    I do not know ffmpeg all that well, this command has been constructed by copying parts of commands I have found online.

  • avformat/mxfenc : Write Mastering Display Colour Volume to MXF

    9 septembre 2020, par Harry Mallon
    avformat/mxfenc : Write Mastering Display Colour Volume to MXF

    Described in Annex B SMPTE ST 2067-21:2020
    

    Signed-off-by : Harry Mallon <harry.mallon@codex.online>
    • [DH] libavformat/mxfenc.c

  • FFMPEG live transcoder aac_latm audio crash

    15 mars 2013, par user1716057

    i am trying to use ffmpeg as a live transcoder to transcode tv channels from udp input to rtmp output to a wowza server.

    i have 2 kinds of input channels in 1st kind the input audio is mp2 and in the second kind the input audio is acc_latm.

    my problem is when i transcode the mp2 channels everything is fine but when i try to transcode the aac channel the audio is muted after few hours. but the video is fine.

    the output codecs are : libx264 for video and faac or fdk-aac for audio output
    i tried both aac encoders but it did not change.

    i think it is the ffmpeg aac decoder's problem. but i cannot fix this.

    i need a way to detect the problem online and restart the ffmpeg. or change the ffmpeg decoder codec.

    please help.
    thanks.

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