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Autres articles (18)
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Submit bugs and patches
13 avril 2011Unfortunately 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 (...) -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...) -
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) (...)
Sur d’autres sites (5193)
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x264 library speed - Altivec vs SSE2 -
25 février 2013, par Omer MerdanI have simple cheap dualcore intel-3ghz-debian and access to super-expensive powerPc7-Aix.
And after few days of strugle, i compiled libx264 and tested it on both computers :
- GCC : library x264 on intel (with SSE2 capabilities) and
- GCC on 16 core powerPc (with altivec).
... and result is that cheap intel is x2 times faster ! (with altivec disabled, intel is 10x times faster)
My question : is this normal ?
Does all other powerPC-users have same results ? Can powerPc-altivec-optimisation of x264 library work at same speed with intel... or MMX/SSE optimisation is officially at least 2 times faster for this library ?I am not interested in multi-thread options. Number of cores and threads are irrelevant. Just simple one-thread x264 encoding with default "medium preset" using rawvideo as source, sse vs altivec.
Maybe native Aix XLC compiler provide better results ? (i managed only gcc to work)
... mac-powerpc-users maybe know something about this.
powrPc7-Aix:$ time (cat raw10sec.y4m |x264 --input-res 720x576 --fps 50 -o /dev/null -)
x264: 64-bit XCOFF
x264 [info]: using cpu capabilities: Altivec
time: real 0m33.559s
---
intelDebian:$ time (cat raw10sec.y4m |x264 --input-res 720x576 --fps 50 -o /dev/null -)
x264: ELF 32-bit LSB executable
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
time: real 0m16.503s -
x264 library speed - Altivec vs SSE4 -
15 août 2015, par Asain KujovicI have simple cheap dualcore intel-3ghz-debian and access to super-expensive powerPc7-Aix.
And after few days of strugle, i compiled libx264 and tested it on both computers :
- GCC : library x264 on intel (with SSE2 capabilities) and
- GCC on 16 core powerPc (with altivec).
... and result is that cheap intel is x2 times faster ! (with altivec disabled, intel is 10x times faster)
My question : is this normal ?
Does all other powerPC-users have same results ? Can powerPc-altivec-optimisation of x264 library work at same speed with intel... or MMX/SSE optimisation is officially at least 2 times faster for this library ?I am not interested in multi-thread options. Number of cores and threads are irrelevant. Just simple one-thread x264 encoding with default "medium preset" using rawvideo as source, sse vs altivec.
Maybe native Aix XLC compiler provide better results ? (i managed only gcc to work)
... mac-powerpc-users maybe know something about this.
powrPc7-Aix:$ time (cat raw10sec.y4m |x264 --input-res 720x576 --fps 50 -o /dev/null -)
x264: 64-bit XCOFF
x264 [info]: using cpu capabilities: Altivec
time: real 0m33.559s
---
intelDebian:$ time (cat raw10sec.y4m |x264 --input-res 720x576 --fps 50 -o /dev/null -)
x264: ELF 32-bit LSB executable
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
time: real 0m16.503s -
x264 library speed - Altivec vs SSE4 -
15 août 2015, par Asain KujovicI have simple cheap dualcore intel-3ghz-debian and access to super-expensive powerPc7-Aix.
And after few days of strugle, i compiled libx264 and tested it on both computers :
- GCC : library x264 on intel (with SSE2 capabilities) and
- GCC on 16 core powerPc (with altivec).
... and result is that cheap intel is x2 times faster ! (with altivec disabled, intel is 10x times faster)
My question : is this normal ?
Does all other powerPC-users have same results ? Can powerPc-altivec-optimisation of x264 library work at same speed with intel... or MMX/SSE optimisation is officially at least 2 times faster for this library ?I am not interested in multi-thread options. Number of cores and threads are irrelevant. Just simple one-thread x264 encoding with default "medium preset" using rawvideo as source, sse vs altivec.
Maybe native Aix XLC compiler provide better results ? (i managed only gcc to work)
... mac-powerpc-users maybe know something about this.
powrPc7-Aix:$ time (cat raw10sec.y4m |x264 --input-res 720x576 --fps 50 -o /dev/null -)
x264: 64-bit XCOFF
x264 [info]: using cpu capabilities: Altivec
time: real 0m33.559s
---
intelDebian:$ time (cat raw10sec.y4m |x264 --input-res 720x576 --fps 50 -o /dev/null -)
x264: ELF 32-bit LSB executable
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
time: real 0m16.503s
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