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Autres articles (97)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

Sur d’autres sites (8225)

  • Using FFmpeg, How to convert an frame image sequence to video(video codec : dvvideo) ?

    25 mai 2022, par ruping

    I'm working on an image processing project.

    


    The project proceeds as follows :

    


    Input Video -> frame Sequence -> (Processing) -> Output Video

    


    I want to create the output video with the same specifications as the input video.

    


    The specs of the input video we use are :

    


    - Size : 1280x1080, Codec : dvvideo, pixel_fmt : yuv422


    


    But I am struggling with the following error :

    


    Duration: 00:00:03.20, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgb24(pc), 1280x1080 [SAR 3:2 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (png (native) -> dvvideo (native))
Press [q] to stop, [?] for help
[dvvideo @ 0x55b965b745c0] DVCPRO HD encoding is not supported.
[dvvideo @ 0x55b965451780] ff_frame_thread_encoder_init failed
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!


    


    The code is below. (subprocess in python)

    


    ffmpeg -y -f image2 -r "{fps}" -i {input_img_root} -s 1280:1080 -b:v {bit_rate}  -vcodec dvvideo -pix_fmt yuv422p "{output}"


    


    (fps and bitrate are taken from the input video. and input_img_root and output are paths.)

    


    I've been trying for several days, but it doesn't work.

    


    If you know any way to make a new video while maintaining the video specifications (Especially dvvideo codec)(not using ffmpeg), it would be nice to share it.

    


  • How to add dynamic captions with animations on a video in a cross-platform Android & iOS app and export it as a final video ? [closed]

    29 avril, par Danial Qsk

    I'm building a cross-platform mobile app using Flutter (or React Native) where users can :

    


    Add dynamic text captions with animations over a video, similar to TikTok

    


    See these changes in real-time during video playback

    


    Export the video with the animated captions burned into the output (e.g., MP4)

    


    What I’ve implemented so far :

    


    Video playback using video_player in Flutter (or react-native-video).

    


    Captions are rendered using Canvas/UI layer during playback.

    


    Problem : While I can overlay animated text in the UI, I can't figure out how to include these in the exported video. I’m considering using FFmpeg to burn in the captions, but I’m unclear how to integrate it with the animated UI overlays or render them into a final video on both Android and iOS.

    


    What I want to achieve :

    


    Efficient way to render animated text overlays onto a video and export it as a final video file on both Android and iOS.

    


    Maintain good performance for real-time playback and smooth export.

    


    What approaches or processing pipelines could achieve this ?
(For example, rendering the UI layer to an offscreen video, integrating with FFmpeg, or using native rendering techniques.)

    


  • While concating video with ffmpeg-concat middle video if freezed

    9 juillet 2021, par mayank1513

    I am using ffmpeg-concat to concat 3 videos. The middle video however has dimension 718x1280. ffmpeg-concat works great except it freezes the middle video. So, I only see the first frame stuck...

    


    How to fix this ?

    


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