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Autres articles (66)
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Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
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Les tâches Cron régulières de la ferme
1er décembre 2010, parLa gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
Le super Cron (gestion_mutu_super_cron)
Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...) -
Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs
Sur d’autres sites (9735)
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Revision 5290eeab88 : Speed 2 feature adjustment. With sf->auto_mv_step_size on it is questionable wh
3 juillet 2013, par Paul WilkinsChanged Paths :
Modify /vp9/encoder/vp9_onyx_if.c
Speed 2 feature adjustment.With sf->auto_mv_step_size on it is questionable
whether sf->reduce_first_step_size is worthwhile.
At speed 2 it was not having a big impact.Even at speed 2 sf->optimize_coefficients = 0 is not
having a big speed imapct so for now I have moved it
down into a higher speed setting.Change-Id : I8a54de76d486ad37aabce76474889da2768b14c1
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How to speed up ffmpeg video conversions [closed]
24 janvier 2013, par PIKPI need to extract the audio as a MP3 file from a given video file. I have selected "ffmpeg" for audio extraction process. with the use of following arguments I have managed to extract the audio as a MP3. this work very well. but it takes about "2 minutes" to extract the audio from "21 minutes" long video file.
ffmpeg -i source_video.avi -vn -ar 44100 -ac 2 -ab 128k -f mp3 sound.mp3
for my purpose "2 minutes" for "21 minutes" is a long time. I need to speed up this as much as possible.
could someone please tell me what are the factors that control the conversion speed ?
currently I'm using a SATA hard disk with 7500rmp, will it speed up the conversion process if I upgrade my hard disk to SSD ?
Thank you !
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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
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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