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Autres articles (32)
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Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
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Support audio et vidéo HTML5
10 avril 2011MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...) -
Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
Sur d’autres sites (4107)
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jpeg2000 : Validate block lengthinc
1er juillet 2013, par Luca Barbato -
Revision 8d3d2b76f3 : Tx size selection enhancements (1) Refines the modeling function and uses that
22 juin 2013, par Deb MukherjeeChanged Paths :
Modify /vp9/common/vp9_blockd.h
Modify /vp9/encoder/vp9_encodeframe.c
Modify /vp9/encoder/vp9_onyx_if.c
Modify /vp9/encoder/vp9_onyx_int.h
Modify /vp9/encoder/vp9_rdopt.c
Tx size selection enhancements(1) Refines the modeling function and uses that to add some speed
features. Specifically, intead of using a flag use_largest_txfm as
a speed feature, an enum tx_size_search_method is used, of which
two of the types are USE_FULL_RD and USE_LARGESTALL. Two other
new types are added :
USE_LARGESTINTRA (use largest only for intra)
USE_LARGESTINTRA_MODELINTER (use largest for intra, and model for
inter)(2) Another change is that the framework for deciding transform type
is simplified to use a heuristic count based method rather than
an rd based method using txfm_cache. In practice the new method
is found to work just as well - with derf only -0.01 down.
The new method is more compatible with the new framework where
certain rd costs are based on full rd and certain others are
based on modeled rd or are not computed. In this patch the existing
rd based method is still kept for use in the USE_FULL_RD mode.
In the other modes, the count based method is used.
However the recommendation is to remove it eventually since the
benefit is limited, and will remove a lot of complications in
the code(3) Finally a bug is fixed with the existing use_largest_txfm speed feature
that causes mismatches when the lossless mode and 4x4 WH transform is
forced.Results on derf :
USE_FULL_RD : +0.03% (due to change in the tables), 0% encode time reduction
USE_LARGESTINTRA : -0.21%, 15% encode time reduction (this one is a
pretty good compromise)
USE_LARGESTINTRA_MODELINTER : -0.98%, 22% encode time reduction
(currently the benefit of modeling is limited for txfm size selection,
but keeping this enum as a placeholder) .
USE_LARGESTALL : -1.05%, 27% encode-time reduction (same as existing
use_largest_txfm speed feature).Change-Id : I4d60a5f9ce78fbc90cddf2f97ed91d8bc0d4f936
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Revision 0e23048303 : BITSTREAM - "update_map" SEMANTICS BROKEN IN 398ddafb629b7f49cf255bf09d3e38b4abd
3 octobre 2013, par Dmitry KovalevChanged Paths :
Modify /vp9/decoder/vp9_decodemv.c
Modify /vp9/decoder/vp9_decodframe.c
BITSTREAM - "update_map" SEMANTICS BROKEN IN
398ddafb629b7f49cf255bf09d3e38b4abd0bb95This patch reverts old commit 398ddafb629b7f49cf255bf09d3e38b4abd0bb95
"New way of updating last frame segmentation map.".Change-Id : Iba730f433c30ed7f5e5449d6768049cbf9a2b2c5