Recherche avancée

Médias (1)

Mot : - Tags -/3GS

Autres articles (103)

  • Changer son thème graphique

    22 février 2011, par

    Le thème graphique ne touche pas à la disposition à proprement dite des éléments dans la page. Il ne fait que modifier l’apparence des éléments.
    Le placement peut être modifié effectivement, mais cette modification n’est que visuelle et non pas au niveau de la représentation sémantique de la page.
    Modifier le thème graphique utilisé
    Pour modifier le thème graphique utilisé, il est nécessaire que le plugin zen-garden soit activé sur le site.
    Il suffit ensuite de se rendre dans l’espace de configuration du (...)

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (6560)

  • Creating image overlay on video like tiktok on a video in flutter [closed]

    12 octobre 2020, par Sarthak Singhal

    I am trying to create an app in flutter in which user can add image on a video like the given screenshot. The user should be able to move the image widget anywhere on the screen, resize it, and rotate it also. When this is done, the image should be merged on the video.

    


    For now I have used Stack and MatrixGestureDetector to let the user move the images on the screen.

    


    I want to know how to merge this image along with the exact scale, rotation and position as seen on the screen.

    


    Also if I am going in wrong direction then please guide me the right way to do image overlay on a video in flutter like that of tiktok or snapchat.

    


    As you can see, we can move image and draw text in canvas over a video. After doing all this, how to get exact positions about where to merge the images

    


  • How to use subtitles filter to a video VFR ( variable frame rate ) video ? [migrated]

    14 février 2019, par iaaflaafc

    I have created a VFR (variable frame rate) video from a list of images by using the following ffmpeg command.

    ffmpeg -f concat -i concat.txt -vsync vfr -pix_fmt yuv420p output.mp4

    where the concat.txt is a text file which contains the list of the image locations and durations in the below format.

    file image01.png
    
duration 3
    
file image02.png
    
duration 5
    
file image02.png

    I have a subtitle file (.srt file) that I would like to add to the generated video by using the subtitles filter.

    I tried to use the subtitles filter by running the following command

    ffmpeg -i output.mp4 -codec:a copy -vf subtitles=subtitles.srt -max_muxing_queue_size 4096 outputWithSubtitles.mp4

    I find that the resultant output file does not show any subtitles.

    I find that if instead of VFR video if constant frame rate video is generated, then this issue is not observed i.e., during the generation of the first video from images if -vsync vfr option is not used, then a constant frame rate video is generated and using subtitles filter works.

    Is there a way to use the subtitles filter on a VFR video ?

  • How to merge webm video with mp4 video with transperency ?

    30 novembre 2017, par kostya572

    I have 1080p webm video and 500x300 mp4 video. How could I place muted mp4 video on top-center position of webm video with transparency ? The output file format needed ".webm". Here what similar code I found, but it uses two mp4 videos and second video scales full width on front of first one :

    ffmpeg \
           -i in1.mp4 -i in2.mp4 \
           -filter_complex " \
               [0:v]setpts=PTS-STARTPTS, scale=480x360[top]; \
               [1:v]setpts=PTS-STARTPTS, scale=480x360, \
                    format=yuva420p,colorchannelmixer=aa=0.5[bottom]; \
               [top][bottom]overlay=shortest=1" \
           -vcodec libx264 out.mp4

    Output log :
    Output log:

Navigation