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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

Sur d’autres sites (4406)

  • HEVC with Alpha Encoding on Windows

    14 juillet 2023, par CodeVortex

    I know, this question has been asked before, but most of the answers to them are very old.

    


    Actually, I am developing a website which uses transparent videos. So, I am using .webm format for them. However, as you know it is not possible to run .webm with transparency on Apple products. So, after researching on internet(stackoverflow etc), I found a solution that I should convert my video into a series of PNGs and then convert them into HEVC with alpha channel. However, according to the research I done, only the Apple hardware can properly encode HEVC with alpha channel.

    


    I am a newbie to these codecs and formats stuff. So, I think that I read somewhere that latest versions of FFMPEG can also encode HEVC with alpha. However, being a noob I can't figure out any way to write a command for this purpose. Being a beginner with almost non-existent skills in this field of expertise, it is nearly impossible for me to understand the documentations correctly. I also tried using shutterencoder and some other tools but failed.

    


    Although, there is a quicktime .mov solution but with that the file size becomes too large for my 10 sec video, almost 334 mb and as you know this size is too large for a animation video on a landing-page style basic website.

    


    So, now my question is there any way to properly encode HEVC with alpha on Windows or Linux to maintain transparency ?

    


    If this is not possible, then is there any other way to create such transparent videos on Windows or Linux which can be played on browsers of Apple devices ?

    


    I am stuck on this for 3 days, So, any type of help is greatly regarded. I am also providing the link to my videos, if someone wants to take a closer look on codes and formats of these videos : Videos Link

    


    P.S : if anyone with a mac device can encode these transparent videos for me, then that would be best and I shall be very grateful to you

    


  • FFMPEG for Windows - suggestions for how to overcome the " No such file or directory" issue

    11 mars 2023, par Scott Hatton

    I am using FFMPEG (Windows version)

    


    I have files called 'MCR_0400.jpeg' numbered sequentially up to 'MCR_0450.jpeg'

    


    When I run :
ffmpeg -i 'MCR_%4d.jpeg' -start_number 0400 -c:v libx264 out.mp4

    


    it returns :
Could find no file with path 'MCR_%4d.jpeg' and index in the range 0-4
'MCR_%4d.jpeg' : No such file or directory

    


    I have spend the day trying all sorts of variations on the file name parameter : with and without quotes, full Windows path to it so I assume I'm doing something really stupidly wrong.

    


    But I just cannot fathom it.

    


    Can anybody help ?

    


  • invalid syntax while concat mpeg files on windows PYTHON

    26 novembre 2016, par SMH

    I am tying to concatenate all mpeg files together in one new file in windows 7, I adjusted the environment variables and running the code from python shell but it gives invalid syntax. Any help as I am new to Python and ffmpeg library ?

    My code :

    ffmpeg -f concat -i <(for f in glob.glob("*.mpeg"); do echo "file '$PWD/$f'"; done) -c copy output.mpeg

    Thanks

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