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Autres articles (17)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • 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 (3751)

  • slideshow with ffmpeg with slide transition from right to left

    24 octobre 2016, par Andrea Peluso

    I am looking for experts in ffmpeg...
    I need to create a short slideshow with ffmpeg in bash, for example with 3 pictures. I tried in this way :

    /usr/bin/ffmpeg -y -framerate 1/3 -i %03d.jpg -c:v libx264 -r 25 slideshow.mp4

    but I would like that the pictures work like a slide, from right to left.

    Then, I need to insert this slideshow into a video having a transparent portion, so I tried in this way :

    /usr/bin/ffmpeg -y -i natale14.mp4 -i slideshow.mp4 -filter_complex "[0:v]overlay=288:95[tl];[tl][1:v]overlay=enable='between(t\,61,70)'[out]" -map [out] natale.mp4

    but I found some problems, as the slideshow must be seen only from 61° second to the 70° second of the original video and not for its entire duration, but the filter does not work.
    Moreover, the slideshow would stay at a lower level than the video and not above.

    I hope someone can help me !

  • How to have low buffer when capturing sound with FFmpeg

    8 mai 2018, par gagz

    I’m capturing sound from the jack input of a computer and sending that to a Icecast server, using FFmpeg.

    See the line :

    /usr/bin/ffmpeg -f alsa -i plughw:1 -c:a libmp3lame -b:a 96k -ar 32000 -content_type audio/mpeg -f mp3 icecast://source:password@myserver.net:8000/live

    On the Icecast side, I use default settings, and play the stream with mplayer.

    But the bandwidth on both sides is quite low (3G connections), thus after a while, the delay goes up to a few minutes, so I have to restart ffmpeg.

    I’m quiet sure now that ffmpeg keeps collecting data when frames are dropped by the network, but it keeps them until the connection comes back and then sends them to icecast.

    How can I tell FFmpeg to stay synchronised with the sound card ? Or have a maximum of 5 seconds delay ?

    Thank you !

  • How to change PicOrderCntVal when decoding corrupt HEVC

    12 mai 2020, par Joe Harrison

    How can I change the PicOrderCntVal for duplicate packets ? When NAL units of type 0 or 1 are duplicated the image stay static. I'm trying to create the datamoshing blooming effect for HEVC by purposely duplicating P-frames. FFmpeg logs an error saying that duplicate POCs were found. This code is found here. My guess is that if the POC was a different number that the no error will be returned.

    



    8.3.1 of the ITU Recommendation for HEVC shows how to get the PicOrderCntVal. But what should I change for all following frames so that the decoder doesn't think there are duplicate frames ?

    


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