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  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (6444)

  • Estimate time of transcoding video FFMPEG [on hold]

    9 mars 2019, par Anh Vo Nguyen Nhat

    Currently, I want to assign a video transcoding task to a computer in my distributed network. The computer are heterogeneous, so I have to check whether that computing can handle the task fast enough (during a specified deadline). My approach for this is to run many experiments and then based on the statistics I will try to estimate the time when running another task.

    I am trying to predict beforehand the time it takes when transcoding a video (e.g. transcoding 1920x1080 H264 video to 1280x720 VP9) using FFMPEG tool.
    I have used the following features to build a simple neural network to predict the time :
    - Video Resolution (Input + Output)
    - Video Duration
    - Video Codec (Input + Output)
    - Video Bitrate
    - Video Framerate
    - Number of B, I, P frames

    However, the result is not really promising. I want to ask if there is any other way to estimate/predict the time it takes when transcoding a video ? Are there any other features beside the listed that affects the transcoding time ?

  • ffmpeg cut the video and get accurate begining time of the result

    1er décembre 2022, par Pavlo Sharhan

    I do the cut via :

    


    ffmpeg -i  long_clip.mp4 -ss 00:00:10.0 -c copy -t 00:00:04.0 short_clip.mp4


    


    I need to know the precise time where did the ffmpeg do the cut (Time of the closest keyframe before the 00:00:10.0)

    


    Currently, I'm using the following ffprobe command to list all the keyframes and select the closest before 00:00:10.0

    


    ffprobe -show_frames -skip_frame nokey long_clip.mp4


    


    It works extremely slow (I run It on Jetson Nano, and It is a few minutes to list the keyframes for 30 sec video, although the cutting is done in 0.2seconds)

    


    I hope there is the much faster way to know the time of the keyframe where ffmpeg does the cut, at least because ffmpeg seeks to this keyframe and cuts the video less than in half a second.

    


    So in other words the question is : How to get the time of the keyframe where ffmpeg does the cut not listing all the keyframes ?

    


  • FFMPEG Manipulate the start time [duplicate]

    9 octobre 2018, par Sean

    This question already has an answer here :

    I have an ISMV file (fragmented MP4) which has a set start time (an epoch time) which allows other metadata to synchronise with it.

    if I ffprobe it I get the following ;

    Duration: 00:44:00.28, start: 1537792418.761560, bitrate: 3970 kb/s

    Is it possible to manipulate the start time ?
    I have had to re-encode the file, and it’s start time is now zero.
    I have checked many options, but am really unclear what is possible.

    From what I see I should be looking at a filter with the pts options. But I’m unclear what it should actually be after many hours of searching and fiddling ?

    Cheers in advance.

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