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Autres articles (104)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Le plugin : Podcasts.

    14 juillet 2010, par

    Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
    Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
    Types de fichiers supportés dans les flux
    Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)

Sur d’autres sites (7014)

  • ffmpeg and use of the ildct flag in progressive encoding

    14 décembre 2023, par Mikolaj

    I've encountered an intriguing scenario where someone else has programmed an ffmpeg encoding command with flags that seem puzzling, and I'm having difficulty understanding their purpose.

    


    The command in question is :

    


    ffmpeg -loglevel info -y -r 29.97 -start_number 0 -i image_sequence_%4d.png -vcodec dnxhd -vf format=yuv422p10,colorspace=bt709:iall=bt601-6-625:fast=1 -b:v 220M -flags +ildct output.mov


    


    I've been struggling to find information on what the addition of ildct does to the output. It appears to be influencing the media to perceive it as interlaced, even though it is, in fact, progressive. Using the flag ildct seems counterintuitive and unproductive.

    


  • Convert raw PCM data to video ?

    2 mai 2013, par user1801247

    I have file consisting of raw PCM data (no headers). I have been able to successfully play this file by opening it in Audacity (by importing the raw data).

    This file (as part of a game), apparently contains a video at the end of the file.

    I was hoping to be able to play this PCM data as a video without regard for headers as Audacity was able to do for audio.

    I took a look at ffmpeg to convert the .wav/.pcm to .mov, but there are no examples of going from audio -> video (an understandably rare scenario).

    Are there any tools out there to play my data as a video, without regard for validity ?

  • Speed change command fails when audio stream is not present in video - ffmpeg

    26 juillet 2016, par lalith

    I am trying to change speed of the video that does not contain audio stream via below command

    String[]{"ffmpeg", "-y", "-i", orginalFile, "-threads", "5", "-preset", "ultrafast", "-strict", "experimental", "-filter_complex", "[0:v]setpts=0.50*PTS[v];[0:a]atempo=2.0[a]", "-map", "[v]", "-map", "[a]", "-b", "2097k", "-ab", "48000", "-ac", "2", "-ar", "22050", "-vcodec", "mpeg4", destinationFile};

    Command fails stating that video does not have audio stream. So, do I need to check whether audio stream is present in the video or is there something I can do in this scenario ?

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