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Autres articles (6)

  • L’utiliser, en parler, le critiquer

    10 avril 2011

    La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
    Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
    Une liste de discussion est disponible pour tout échange entre utilisateurs.

  • 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 (...)

Sur d’autres sites (5324)

  • How to darken overlay background with ffmpeg ?

    2 novembre 2019, par Kartik Garasia

    How can I darken the background video in a single line ?

    I have 2 input streams

    1. frame%d.png (series of images frame1.png, frame2.png...)
    2. bg.mp4

    Currently, I can overlay and scale with the following command,

    "-i" ,frame%d.png, "-i", bg.mp4,"-r", "30","-filter_complex","scale2ref[a][b];[b][a]overlay", output.mp4

    but before merge these 2 inputs I want to darken the background.

    This is what I have tried

    ffmpeg -i chunk%d.png -i bg.mp4 -filter_complex "scale2ref[a][b];[b][a]overlay,[1:v]eq='brightness=-0.05'" -y t3.mp4

    But it resulting in the same merged video without darkening bg.mp4.

  • Is it possible to force ffmpeg/libav decoder to output an H.264 frame with only current information ?

    19 mars 2018, par Andy Krouwel

    I’m currently using a slightly legacy version of ffmpeg/libav to decode H.264 frames.

    It decodes them with a call to :

    avcodec_decode_video2(context, &outPicture, &gotPicture, inNALPacket);

    For this I provide a series of NAL packets, and once it has ’enough’ it produces the image frame, as outPicture.

    So far, so good.

    However, sometimes (due to network issues) a packet/NAL goes missing.
    I can detect this.
    When this happens I would like to give up on this frame, and tell the decoder to just give me its best shot at the image, given the data so far.

    Is there any way of doing this ? eg. can I construct an inNALPacket that essentially tells the encoder to give up and move on ?

  • How to record video and audio(both mic and speaker) audio using ffmpeg ?

    21 décembre 2022, par Mruthyunjaya M

    I am facing error when i try to record both audio MIC and SPEAKER new i need need command for record video and audio(both mic and speaker).

    


    Tried bwlow command

    


    ffmpeg -f dshow -i audio="Headset Microphone (Plantronics Blackwire 3225 Series)" -f dshow -i audio="virtual-audio-capturer" -f gdigrab -framerate 10 -video_size 1920x1080 -draw_mouse 1 -i desktop -map 2 -map 0 -map 1 screen.avi

    


    but its not working its throughing some error.

    


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