Recherche avancée

Médias (91)

Autres articles (52)

  • 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 (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

Sur d’autres sites (3784)

  • lavf/subviewerdec : Support higher sub-second precision.

    20 mars 2020, par Carl Eugen Hoyos
    lavf/subviewerdec : Support higher sub-second precision.

    Fixes ticket #8575.
    • [DH] libavformat/subviewerdec.c

  • FFmpeg - How to trim with high precision ?

    11 octobre 2016, par DSalenga

    I am pretty stucked with the way that FFmpeg trims videos, so I would be really grateful if someone could help me.
    Basically, what I am trying to do is : I have a video sequence and I want it to stop in a certain second, freeze the image some seconds (like a pause), and then reproduce again from the same exact frame. I could say that I am dealing with three videos : A.mp4 (first part of the video sequence), B.mp4 (frozen image) and C.mp4 (second part of the video sequence). Besides, I also perform an overlay with filter_complex.

    The part of generating a video from a static image is not a problem, my main concern is to find the way to trim and concatenate videos accurately. From other posts and sources, I discovered that FFmpeg trims from those Frames that are Keyframes, which can be forced. However, the result I obtain is not the appropriate one, because my video A ends in a frame different from the one in the beginning of C.

    The commands I am using are the following ones :

    ffmpeg -y -i VideoSequence.mp4 -c:v libx264 -pix_fmt yuv420p \
    
-force_key_frames "expr: gte(t,n_forced * 15)" -t 30 VideoOut.mp4

    [Note that everything inside Filter Complex is about an Overlay, which works fine]

    As far as I know, the resulting video should have a Keyframe every 15 seconds. Now, I want to cut the video into 2 parts ("before second 15" and "after second 15") :

    ffmpeg -y -ss 00:00:01 -i VideoOut.mp4 -t 14 -c copy A.mp4
    

    
ffmpeg -y -ss 00:00:15 -i VideoOut.mp4 -t 5 -c copy C.mp4

    As mentioned, I expect the end of A.mp4 to "match" with the beginning of C.mp4 (at a frame precision), but the result I obtain is far from being perfect.

    Thank you very much, any kind of help will be appreciated !

  • webm_chunk : Set pts precision to milliseconds

    23 août 2016, par Vignesh Venkatasubramanian
    webm_chunk : Set pts precision to milliseconds

    Milliseconds is the de-factor precision for timestamps in
    
Matroska/WebM media.
    

    Signed-off-by : Vignesh Venkatasubramanian <vigneshv@google.com>
    
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
    • [DH] libavformat/webm_chunk.c

Navigation