Recherche avancée

Médias (1)

Mot : - Tags -/artwork

Autres articles (52)

  • 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) (...)

  • Menus personnalisés

    14 novembre 2010, par

    MediaSPIP utilise le plugin Menus pour gérer plusieurs menus configurables pour la navigation.
    Cela permet de laisser aux administrateurs de canaux la possibilité de configurer finement ces menus.
    Menus créés à l’initialisation du site
    Par défaut trois menus sont créés automatiquement à l’initialisation du site : Le menu principal ; Identifiant : barrenav ; Ce menu s’insère en général en haut de la page après le bloc d’entête, son identifiant le rend compatible avec les squelettes basés sur Zpip ; (...)

  • 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.

Sur d’autres sites (3887)

  • Creating a transparent video out of an input video

    28 juillet 2021, par poldown

    I'm trying to create a video with a transparent background out of an input video (with the same dimensions, etc.). I tried several strategies (using the chromakey filter and others) and none worked... I got this far :

    


    ffmpeg -i input.mp4 -filter_complex "color=color=black@0.0,format=yuva420p[bg],[bg][0:v]scale2ref[bg][0v],[bg]drawbox=x=10:y=10:w=100:h=100:color=pink@0.5;[0v]nullsink" -c:v qtrle -an "alpha.mov"


    


      

    • creating a video stream with transparency, and setting a transparent background (black@0.0)

      • 


    • scaling the transparent video according to the input video

      • 


    • [for testing purposes : drawing a box over the transparent video. I omitted the part in which I embed subtitles onto the video, for simplicity's sake]

      • 


    • discarding the input video stream

      • 


    • removing the audio stream

      • 


    


    It basically works, but the processing never ends - I can't manage to limit the output video length so it'll match the input video's length...
I've tried using the -shortest option anywhere in the command - with no success.

    


  • How to generate pcm audio file by setting 20 bit depth ?

    6 juillet 2015, par vip007

    No option using ffmpeg

    I am using ffmpeg to generate audio data. I am using following command

    ffmpeg.exe -i in.wav -ar 44100  -acodec pcm_s16le  -ac 1 out.wav

    but there is no option to convert to 20 bit depth pcm audio. (something like pcm_s20le).

    I want to perform some operations on apple codec (e.g. encoding pcm audio data to alac).

    On ALAC source : http://alac.macosforge.org/trac/browser/trunk/ReadMe.txt , it has been mentioned like this ;

    Apple Lossless supports the following features
    1. Bit depths 16, 20, 24 and 32 bits.

    Media Foundation on windows throwing exception for 20 bit depth

    I tried sample encoding and transcoding application mentioned on MSDN https://code.msdn.microsoft.com/windowsapps/media-transcode-sample-f7ba5269

    with following configuration but it failed

    spTypeOut->SetUINT32(MF_MT_AUDIO_BITS_PER_SAMPLE, 20);  

    NOTE : but i put 16 instead of 20 ; it created smoothly.

    Is there any way to generate such 20 bit PCM audio ? What is so special about 20 bit depth that it is not being considered on ffmpeg and media foundation but on apple codec ?

  • Raspberry Pi HLS streaming [on hold]

    5 mars 2015, par Razvan-Catalin Olaru

    I have a rev. B Raspberry Pi and want to stream from my Microsoft Lifecam VX-800 to a web server using HLS protocol and avconv/ffmpeg, preferably without using raspivid because it’s not working (couldn’t figure out why). The stream needs to be fed to jwplayer. I went through a lot of guides but none seem to be fitting my needs. Could you give me detailed instructions on how to do the live streaming or give me links to detailed tutorials that you tried and worked ?

    Thanks.

Navigation