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  • D’autres logiciels intéressants

    12 avril 2011, par

    On ne revendique pas d’être les seuls à faire ce que l’on fait ... et on ne revendique surtout pas d’être les meilleurs non plus ... Ce que l’on fait, on essaie juste de le faire bien, et de mieux en mieux...
    La liste suivante correspond à des logiciels qui tendent peu ou prou à faire comme MediaSPIP ou que MediaSPIP tente peu ou prou à faire pareil, peu importe ...
    On ne les connais pas, on ne les a pas essayé, mais vous pouvez peut être y jeter un coup d’oeil.
    Videopress
    Site Internet : (...)

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

Sur d’autres sites (10574)

  • Programmatically sending bytes to ffmpeg via STDIN to create still image file

    8 octobre 2019, par Sam Marrocco

    I am attempting to use vb.net code to send individual pixel information as bytes to ffmpeg with the purpose of saving a still DPX image file. I have already successfully read DPX files and output them via STDOUT into vb.net code.

    There seem to be many examples out there of piping movie files but there are also discrepancies, such as some people using image2pipe and others using rawvideo. I am uncertain when to use one over the other. The various methods I’ve tried result in ffmpeg returned errors such as "Packet too small for DPX header" or "Error while decoding stream #0:0 : Invalid data found when processing input". As I understand it, I am not providing a header, only the raw individual pixel RGBRGBRGB.... values as a byte array.

    The arguments sent to ffmpeg via command line are :

    -f image2pipe -pix_fmt rgb24 -s 16x16 -bits_per_raw_sample 8 -c:v dpx -i - \MyPath\MyFilename.dpx

    My vb.net code is as follows :

    Dim P As New Process
    
P.StartInfo.FileName = m_FFMPEGExecutable_PathFile
    
P.StartInfo.Arguments = (see above arguments)
    
P.StartInfo.UseShellExecute = False
    
P.StartInfo.CreateNoWindow = True
    
P.StartInfo.RedirectStandardInput = True
    
p.Start
    

    

    
'Test image: A single red, green, blue, black and white pixel followed by all black
    

    
Dim Tiny((16 * 16) - 1) As Byte
    

    
Tiny(0) = 255
    
Tiny(1) = 0
    
Tiny(2) = 0
    

    
Tiny(3) = 0
    
Tiny(4) = 255
    
Tiny(5) = 0
    

    
Tiny(6) = 0
    
Tiny(7) = 0
    
Tiny(8) = 255
    

    
For i As byte = 9 To ((16x16)-1)
    
   Tiny(i) = 255
    
Next
    

    
'Send the rgb byte array to ffmpeg:
    
P.StandardInput.BaseStream.Write(Tiny, 0, Tiny.Length)
    
P.StandardInput.Flush()
    
P.StandardInput.Close()

    I have tried many variations on the above ffmpeg arguments but cannot seem to avoid these errors. Any suggestions would be appreciated, including information on when to use image2pipe vs. rawvideo.

  • Changing x264 settings on the fly

    22 décembre 2018, par S Red

    I am curious to know if anyone has experience with modifying x264 settings during encoding (this is for testing live streaming hence I need to be able to modify settings based on cpu and upload characteristics).

    I saw an API for encoder_reconfig() in x264.h, curious if folks have used that, and if its accessible from ffmpeg ? Is it possible to modify a high-level option like ’preset’, or do I need to modify individual options like chroma-me, trellis etc.

  • Changing x264 settings on the fly

    22 décembre 2018, par S Red

    I am curious to know if anyone has experience with modifying x264 settings during encoding (this is for testing live streaming hence I need to be able to modify settings based on cpu and upload characteristics).

    I saw an API for encoder_reconfig() in x264.h, curious if folks have used that, and if its accessible from ffmpeg ? Is it possible to modify a high-level option like ’preset’, or do I need to modify individual options like chroma-me, trellis etc.

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