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Autres articles (107)

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • 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 (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

Sur d’autres sites (6137)

  • add username as random position watermark to video using PHP [duplicate]

    12 novembre 2020, par mohamed.nabil

    Iam working on video learning courses website

    


    I want to put a dynamic watermark appears in random positions on top of video with username or email of the logedin user.

    


    is it possible to do this example by using ffmpeg or require Ai ?, website is php wordpress site.

    


    This link provide an example of What I mean from vdocipher website
https://www.vdocipher.com/blog/2014/12/add-text-to-videos-with-watermark/

    


  • How can I concatenate multiple videos while maintaining the original aspect ratio of each

    25 décembre 2019, par Antony

    How can I concatenate multiple videos while maintaining the original aspect ratio ? I think there are 2 approaches to do this. Either scale videos one by one or concatenate them all with one command. Currently, I’m using the following command

    ffmpeg -i 1.mp4 -i 2.mp4 -filter_complex "[0]scale=iw*sar:ih,setsar=1[ref];[1][ref]scale2ref=w=oh*mdar:h=ih[s][v0];[s]pad=1024:576:(ow-iw)/2:(oh-ih)/2,setsar=1[v1];[v0][0:a:0][v1][1:a:0]concat=n=2:v=1:a=1[v][a]" -map "[v]" -map "[a]" out.mp4

    In the above example the reference video(1.mp4) is 720x576[SAR 64:45 DAR 16:9]. This works great for concatenating 2 videos but I don’t know how to make it more dynamic.

    So how could I make the command above work for 3 videos ? Either scaling & concatenating 1 by 1 or all together.

  • Revision d8b4c79270 : Decouple macroblockd_plane buffer usage Make the macroblockd_plane contain dyna

    31 octobre 2013, par Jingning Han

    Changed Paths :
     Modify /vp9/common/vp9_blockd.h


     Modify /vp9/decoder/vp9_decodframe.c


     Modify /vp9/decoder/vp9_onyxd_if.c


     Modify /vp9/decoder/vp9_onyxd_int.h


     Modify /vp9/encoder/vp9_onyx_if.c


     Modify /vp9/encoder/vp9_onyx_int.h



    Decouple macroblockd_plane buffer usage

    Make the macroblockd_plane contain dynamic buffer pointers instead
    static pointers to the memory space allocated therein. The decoder
    uses the buffer allocated in pbi, while encoder will use a dual
    buffer approach for rate-distortion optimization search.

    Change-Id : Ie6f24be2dcda35df7c15b4014e5ccf236fb3f76c

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