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Autres articles (4)

  • 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 (...)

  • 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 (...)

  • La gestion des forums

    3 novembre 2011, par

    Si les forums sont activés sur le site, les administrateurs ont la possibilité de les gérer depuis l’interface d’administration ou depuis l’article même dans le bloc de modification de l’article qui se trouve dans la navigation de la page.
    Accès à l’interface de modération des messages
    Lorsqu’il est identifié sur le site, l’administrateur peut procéder de deux manières pour gérer les forums.
    S’il souhaite modifier (modérer, déclarer comme SPAM un message) les forums d’un article particulier, il a à sa (...)

Sur d’autres sites (717)

  • convert m4a to WAV file (containing signed 16-bit PCM samples) in ffmpeg

    29 avril 2020, par JohnJ

    I have a MP4a file which I am looking to convert to WAV file, containing signed 16-bit PCM samples. I have ffmpeg at my disposal, and looking at previous SOF posts, I have tried :

    



    ffmpeg -y  -i input.mp4  -acodec pcm_s16le -f s16le -ac 1 -ar 16000 output.pcm


    



    but, the program I use complains that this converted file has data in unknown format. I was wondering if anyone had any pointers on how to go from m4a to wav with pcm samples.

    


  • convert MP4 to WAV file (containing signed 16-bit PCM samples) in ffmpeg

    4 novembre 2023, par JohnJ

    I have an MP4 file which I am looking to convert to WAV file, containing signed 16-bit PCM samples. I have ffmpeg at my disposal, and looking at previous SOF posts, I have tried :

    


    ffmpeg -y  -i input.mp4  -acodec pcm_s16le -f s16le -ac 1 -ar 16000 output.pcm


    


    but, the program I use complains that this converted file has data in unknown format. I was wondering if anyone had any pointers on how to go from m4a to wav with pcm samples.

    


  • Calculate PSNR and MSE for individual frames using ffmpeg

    26 juin 2015, par Mayank Agarwal

    I have an avi file.i am converting avi file to .mp4 codec H.264 and ain second case to .mp4 file codec H.265.Now i want to calculate the PSNR/MSE/MSAD between the ref file(avi file) and the converted mp4 file using ffmpeg.Came across ffmpeg command line filters for PSNR and SSIM calculation but it gives the average PSNR value not the PSNR value frame by frame.Also i want to do it using code and not using command line.Read several examples in demuxing.c it is separating the whole file into frames in av_read_frame before calling decode
    but how can i convert pkt to frame and able to calculate PSNR or MSE values.

    Regards
    Mayank

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