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Autres articles (64)
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Des sites réalisés avec MediaSPIP
2 mai 2011, parCette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page. -
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 (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (8961)
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How to Increase Conversions With Form Analysis
30 janvier 2024, par Erin -
arm : vp9 : Add NEON loop filters
14 novembre 2016, par Martin Storsjöarm : vp9 : Add NEON loop filters
This work is sponsored by, and copyright, Google.
The implementation tries to have smart handling of cases
where no pixels need the full filtering for the 8/16 width
filters, skipping both calculation and writeback of the
unmodified pixels in those cases. The actual effect of this
is hard to test with checkasm though, since it tests the
full filtering, and the benefit depends on how many filtered
blocks use the shortcut.Examples of relative speedup compared to the C version, from checkasm :
Cortex A7 A8 A9 A53
vp9_loop_filter_h_4_8_neon : 2.72 2.68 1.78 3.15
vp9_loop_filter_h_8_8_neon : 2.36 2.38 1.70 2.91
vp9_loop_filter_h_16_8_neon : 1.80 1.89 1.45 2.01
vp9_loop_filter_h_16_16_neon : 2.81 2.78 2.18 3.16
vp9_loop_filter_mix2_h_44_16_neon : 2.65 2.67 1.93 3.05
vp9_loop_filter_mix2_h_48_16_neon : 2.46 2.38 1.81 2.85
vp9_loop_filter_mix2_h_84_16_neon : 2.50 2.41 1.73 2.85
vp9_loop_filter_mix2_h_88_16_neon : 2.77 2.66 1.96 3.23
vp9_loop_filter_mix2_v_44_16_neon : 4.28 4.46 3.22 5.70
vp9_loop_filter_mix2_v_48_16_neon : 3.92 4.00 3.03 5.19
vp9_loop_filter_mix2_v_84_16_neon : 3.97 4.31 2.98 5.33
vp9_loop_filter_mix2_v_88_16_neon : 3.91 4.19 3.06 5.18
vp9_loop_filter_v_4_8_neon : 4.53 4.47 3.31 6.05
vp9_loop_filter_v_8_8_neon : 3.58 3.99 2.92 5.17
vp9_loop_filter_v_16_8_neon : 3.40 3.50 2.81 4.68
vp9_loop_filter_v_16_16_neon : 4.66 4.41 3.74 6.02The speedup vs C code is around 2-6x. The numbers are quite
inconclusive though, since the checkasm test runs multiple filterings
on top of each other, so later rounds might end up with different
codepaths (different decisions on which filter to apply, based
on input pixel differences). Disabling the early-exit in the asm
doesn’t give a fair comparison either though, since the C code
only does the necessary calcuations for each row.Based on START_TIMER/STOP_TIMER wrapping around a few individual
functions, the speedup vs C code is around 4-9x.This is pretty similar in runtime to the corresponding routines
in libvpx. (This is comparing vpx_lpf_vertical_16_neon,
vpx_lpf_horizontal_edge_8_neon and vpx_lpf_horizontal_edge_16_neon
to vp9_loop_filter_h_16_8_neon, vp9_loop_filter_v_16_8_neon
and vp9_loop_filter_v_16_16_neon - note that the naming of horizonal
and vertical is flipped between the libraries.)In order to have stable, comparable numbers, the early exits in both
asm versions were disabled, forcing the full filtering codepath.Cortex A7 A8 A9 A53
vp9_loop_filter_h_16_8_neon : 597.2 472.0 482.4 415.0
libvpx vpx_lpf_vertical_16_neon : 626.0 464.5 470.7 445.0
vp9_loop_filter_v_16_8_neon : 500.2 422.5 429.7 295.0
libvpx vpx_lpf_horizontal_edge_8_neon : 586.5 414.5 415.6 383.2
vp9_loop_filter_v_16_16_neon : 905.0 784.7 791.5 546.0
libvpx vpx_lpf_horizontal_edge_16_neon : 1060.2 751.7 743.5 685.2Our version is consistently faster on on A7 and A53, marginally slower on
A8, and sometimes faster, sometimes slower on A9 (marginally slower in all
three tests in this particular test run).This is an adapted cherry-pick from libav commit
dd299a2d6d4d1af9528ed35a8131c35946be5973.Signed-off-by : Ronald S. Bultje <rsbultje@gmail.com>
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What is White Label Analytics ? Everything You Need to Know
6 février 2024, par Erin