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  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • 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 (8127)

  • Why frame->pts increases by 20, rather than by 1 ?

    19 mars 2013, par user1914692

    Following the exmaples of ffmpeg : decoding_encoding.c and filtering_video.c, I process one video file taken by iPhone. The video file : .mov, video dimensions ; 480x272, video Codec : H.264/AVC, 30 frames per second, bitrate : 605 kbps.

    I first extract each frame, which is YUV.
    I convert YUV to RGB24, and process the RGB24, then write the RGB24 to a .ppm file. It shows the .ppm file is correct.

    Then I plan to encode processed RGB24 frames to a video file.
    Since MPEG does not support RGB24 picture format, I used AV_CODEC_ID_HUFFYUV.
    But the output video file (showing 18.5 MB) does not play. Movie Player on Ubuntu claims an error : Could not determine type of stream.
    I also tried it on VCL. It simply does not work, without any error information.

    My second questions is :
    For each extracted fram from the input video file, I get its pts as follows according to filtering_video.c :

    frame->pts = av_frame_get_best_effort_timestamp(frame);

    I print out each frame's pts, and find that it increases by 20, like below :

    pFrameRGB_count: 0,  frame->pts: 0
    
pFrameRGB_count: 1,  frame->pts: 20
    
pFrameRGB_count: 2,  frame->pts: 40
    
pFrameRGB_count: 3,  frame->pts: 60

    Where frame is the extracted frame from the input video, and pFrameRGB_count is the count for processed frame in RGB24 form.

    Why are they wrong ?

  • Using ffmpeg to build a streaming server to stream static media files (broadcast behaviour)

    15 février 2018, par MiDaa

    I’ve read some online articles and SO questions, most of them are about streaming MY video to SERVER like youtube or switch.

    This is about a project of interest, here are what it should do.

    • Work on a Linux server
    • Serve media(preferably multiple format like mp4 mkv) files to client through rtp protocol maybe ?
    • Server could set a specific time to start the streaming or end it
    • Server could pause and resume the streaming(?)
    • Multiple clients connect and play the stream at same time(sounds like a basic feature)

    After some research, I found that ffmpeg is a great open-source candidate for such a project but as a newbie in this area, I’m having a tough time understanding how this whole thing work.

    As this(ffmpeg doc) states, it looks like just a one liner command. But I don’t find anything fit my feature listed above.

    Can ffmpeg be used to achieve those ? If not appriciate any suggesstion on where I should be looking at.

    EDIT :

    • Target devices : iPad,iPhone, Android phones should be able to watch the stream using a web browser(assume a modern browser)

  • How do I convert a .wav file to 16bit 44.1kz using ffmpeg or other utility [closed]

    26 mai 2023, par Seth Edwards

    A preface :
I am building an environment for a my own streaming box. Since building the UI. I turned to the now obsolete MSNTV box to find its UI sound effects.

    


    I found the dump on GitHub. I downloaded and located where the sounds where located.

    


    I listened to them one by one. I noticed that they are wave files. But they sound like they were low quality and may have been compressed before being turned into a wave file.

    


    I was using the Apple Files app on an iPhone 6s running iOS 15.7.1.

    


    They play back fine.

    


    I try importing them into GarageBand for iOS and it gives me an error saying that it only allows 16bit 44.1khz files. This confirmed my suspicion of it being low quality.

    


    I then tried playing them on a Dell Chromebook 3100 running ChromeOS. Chrome’s player would also not play the files.

    


    I need to find out how to convert them to 16bit 44.1khz wave files.

    


    My guess is that since the MSNTV had a small amount of storage space that they compressed the audio.

    


    I tried converting the files to mp3. And they are Noticeably worse.

    


    Does anyone know how to convert these files so they can be played back normally.

    


    In the end I plan to use these files and play them using the pygame library.

    


    I have tried changing the metadata

    


    Converting to mp3

    


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