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Autres articles (60)
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Other interesting software
13 avril 2011, parWe 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 : (...) -
Mise à disposition des fichiers
14 avril 2011, parPar défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...) -
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)
Sur d’autres sites (9286)
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How to de-warp 180 degree or 360 degree fisheye video with ffmpeg ?
31 juillet 2021, par John AllardLet's say I have video from an IP-camera that has a 180 degree or 360 degree fisheye lens and I want to dewarp the image in some way. Ideally I would be able to select some rectangular area of the input image and dewarp that into a "normal" looking output video, but it would also be acceptable to dewarp the the video into some sort of Equirectangular or Equi-Angular Cubemap projection. The input video looks like this






I'm aware of two filters that might be used for this



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lenscorrect
filter - I think that this is on the right course but all of the example that I can find with this filter are only for "minor" fisheye lenses and I can't seem to get this to work correctly for videos with 360 degree fisheye lenses, it simply doesn't dewarp enough. -
v360
filter. I thought that this must be the correctly filter but it seems that it's intended for 360 videos and not 360 degree fisheye lenses ? I didn't know that there was a difference but I can't get it to work. When I try to take my input video and map it through an equirectangular projection I get some odd output like this










I've tried a dozen or so different combinations of parameters but none of them seem to give me the output that I want which is a single dewarped image. Can someone help me with the filter graph parameters to use this filter ?



Is there something that I'm missing ? Are either of these filters the correct way forward ?



EDIT -



I've been experimenting with the
v360
filter and I think I've gotten closer. What I want to do is map afisheye
input to an equirectangular output, so I've tried this


ffmpeg -i input.mp4 -vf v360=fisheye:equirect:id_fov=360 output.mp4



This should mean that my input is a fisheye lens with a diagonal field of view of 360 degrees and I want my output to be an equirectangular projection but this is what I get





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avfilter/vidstabtransform : use AV_OPT_TYPE_BOOL for tripod and debug options
9 septembre 2015, par Clément Bœsch -
Revision 09faceb706 : Fix 2x scaling bug Reported by Alexander Voronov Change-Id : I463ba323cc9f4e345
12 septembre 2014, par Deb MukherjeeChanged Paths :
Modify /vp9/common/vp9_reconinter.c
Fix 2x scaling bugReported by Alexander Voronov
Change-Id : I463ba323cc9f4e345b7e6f759565725737793086