Recherche avancée

Médias (1)

Mot : - Tags -/book

Autres articles (16)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • 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 (...)

  • Le plugin : Podcasts.

    14 juillet 2010, par

    Le problème du podcasting est à nouveau un problème révélateur de la normalisation des transports de données sur Internet.
    Deux formats intéressants existent : Celui développé par Apple, très axé sur l’utilisation d’iTunes dont la SPEC est ici ; Le format "Media RSS Module" qui est plus "libre" notamment soutenu par Yahoo et le logiciel Miro ;
    Types de fichiers supportés dans les flux
    Le format d’Apple n’autorise que les formats suivants dans ses flux : .mp3 audio/mpeg .m4a audio/x-m4a .mp4 (...)

Sur d’autres sites (2398)

  • Is there any library in python or can we use FFMPEG to detect the appearance of the lines pattern in video that is shown in the image attached below ? [closed]

    21 septembre 2022, par Shreyas R

    Video defect appearing frame

    


    Hi All,

    


    I am trying to find a way to detect the appearance of this lines pattern embedded in the link below.
If I get any match of this pattern in a video, I need to record that particular timestamp of the video where I got the pattern match.

    


    My idea is to take the image and compare it against the video to find for approximate match percentage. If I get it, then I record that particular timestamp within a .txt file.

    


    Is there any better way to achieve this ?
I think we can use Python or FFMPEG video filters to get a solution for this.

    


    It would really help if anyone can support with a solution. Thanks

    


    Update :
I got a reference where they have proposed a solution similar to my concern.

    


    https://aws.amazon.com/blogs/media/metfc-automatically-compare-two-videos-to-find-common-content/

    


    So we can try to achieve some output from this solution.

    


  • How to control key-frame generation of ffmpeg ?

    2 janvier 2013, par jAckOdE

    I'm making a segmenter that intervene ffmpeg's write_frame function and write output data to separate files. Each segmented file contains segment of about 3 seconds video.

    The code does following :

    1 - Get transcoded packet  
    
2 - Check if it contains key frame data, if yes goto 3. 
    
3 - Check the duration of current segment, if it exceed 3 seconds, goto 4 
    
4 - Close file, and create new segment, write packet to segment file, goto-1

    General speaking, every segment contains at least 3 seconds video data, and it starts with a key frame.

    The problem is that the output video's duration are very different, some contain 3 seconds, some contain 5 or 6.

    I suspect that the problem due to how ffmpeg generate key frames during transcoding. If the "distance" between two adjacent keyframes are 6s, i got 6 seconds segment.

    Here is my questions :

    1. is that true that ffmpeg generate keyframes at irregular intervals (and interval time can be up to few second (eg. 6) ?

    2. How can we control the ffmpeg key frame generation ? (i guess there should be a ffmpeg command's argument for this, -force_key_frames maybe, but I'm not sure)

  • Revision 416529069b : Rename a vp9 only control with vp9e prefix Also updated comments and doc to mak

    13 mars 2015, par Yaowu Xu

    Changed Paths :
     Modify /vp9/vp9_cx_iface.c


     Modify /vpx/vp8cx.h


     Modify /vpxenc.c



    Rename a vp9 only control with vp9e prefix

    Also updated comments and doc to make it clear that the control is
    supported in VP9 only.

    Change-Id : I6f120b65135fc1185695e9e3dc29fbe0d430824b

Navigation