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Médias (2)
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SPIP - plugins - embed code - Exemple
2 septembre 2013, par
Mis à jour : Septembre 2013
Langue : français
Type : Image
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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (82)
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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 -
Personnaliser les catégories
21 juin 2013, parFormulaire de création d’une catégorie
Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
On peut modifier ce formulaire dans la partie :
Administration > Configuration des masques de formulaire.
Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...) -
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.
Sur d’autres sites (9990)
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FFmpeg cannot recognize a preset even though it does exsist Ubuntu 12.04
31 août 2016, par Ahmad TahboubI have installed ffmpeg and x264 folloowing the steps in this documentation :http://ffmpeg.org/trac/ffmpeg/wiki/UbuntuCompilationGuide
Now I have this line to execute :
sudo /usr/bin/ffmpeg -i input_file.flv -f flv -vcodec libx264 -vpre normal -r 25 -s 0x0 -aspect 1.7777777777778 -padcolor 000000 -padtop 0 -padbottom 0 -padleft 0 -padright 0 -acodec libfaac -ab 128000 -ar 22050 output_file.flv
Input #0, flv, from 'WIN! Jwow.flv':
Metadata:
starttime : 0
totalduration : 101
totaldatarate : 865
bytelength : 10897460
canseekontime : true
sourcedata : BD58B2E43HH1338284027987695
purl :
pmsg :
Duration: 00:01:40.66, start: 0.000000, bitrate: 877 kb/s
Stream #0.0: Video: h264 (Main), yuv420p, 640x360, 745 kb/s, 29.97 tbr, 1k tbn, 59.94 tbc
Stream #0.1: Audio: aac, 44100 Hz, stereo, s16, 131 kb/s
**File for preset 'normal' not found**I have the presets in the the following directories :
/usr/share/ffmpeg
/usr/local/share/ffmpeg
/home/user/.ffmpeg
/usr/local/src/ffmpeg/presetsAnd still getting the same error : File for preset ’normal’ not found
What is the problem here, Please Help !
Extra info - this is what i get when i do ffmpeg -version
ffmpeg version git-2012-05-31-60de761
built on May 31 2012 15:54:11 with gcc 4.6.3
configuration: --enable-gpl --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3 --enable-x11grabThanks !
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RAR Is Still A Contender
RAR (Roshal ARchive) is still a popular format in some corners of the internet. In fact, I procured a set of nearly 1500 RAR files that I want to use in a little project. But I didn’t want my program to have to operate directly on the RAR files which meant that I would need to recompress them to another format. Surely, one of the usual lossless compressors commonplace with Linux these days would perform better. Probably not gzip. Maybe not bzip2 either. Perhaps xz, though ?
Conclusion
At first, I concluded that xz beat RAR on every single file in the corpus. But then I studied the comparison again and realized it wasn’t quite apples to apples. So I designed a new experiment.New conclusion : RAR still beats xz on every sample in this corpus (for the record, the data could be described as executable program data mixed with reduced quality PCM audio samples).
Methodology
My experiment involved first reprocessing the archive files into a new resource archive file format and only compressing that file (rather than a set of files) using gzip, bzip2, xz, and rar at the maximum compression settings.echo filesize,gzip,bzip2,xz,rar,filename > compressed-sizes.csv for f in `ls /path/to/files/*` do gzip -9 —stdout $f > out.gz bzip2 -9 —stdout $f > out.bz2 xz -9 —stdout —check=crc32 $f > out.xz rar a -m5 out.rar $f stat —printf "%s," $f out.gz out.bz2 out.rar out.xz >> compressed-sizes.csv echo $f >> compressed-sizes.csv rm -f out.gz out.bz2 out.xz out.rar done
Note that xz gets the option
'--check=crc32'
since I’m using the XZ Embedded library which requires it. It really doesn’t make a huge different in filesize.Experimental Results
The preceding command line generates compressed-sizes.csv which goes into a Google Spreadsheet (export as CSV).Here are the full results of the bake-off, graphed :
That’s not especially useful. Here are the top 2 contenders compared directly :
Action
Obviously, I’m unmoved by the data. There is no way I’m leaving these files in their RAR form for this project, marginal space and bandwidth savings be darned. There are other trade-offs in play here. I know there is free source code available for decompressing RAR files but the license wouldn’t mesh well with GPL source code libraries that form the core of the same project. Plus, the XZ Embedded code is already integrated and painstakingly debugged.During this little exercise, I learned of a little site called Maximum Compression which takes experiments like the foregoing to their logical conclusion by comparing over 200 compression programs on a standard data corpus. According to the site’s summary page, there’s a library called PAQ8PX which posts the best overall scores.
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Is there a way to calculate a average bitrate of video stream for each second ? Using ffmpeg or gsteamer toolkits [closed]
15 mai 2012, par IOExceptionI've encoded some video sample by different x264 presets. I already gathered some metric for each preset's file sample (PSNR,SSIM http://en.wikipedia.org/wiki/Structural_similarity)
Now I am curious in instant (every seconds) file sample's bitrate, to compare them.I found out simple solution by googling around :
http://akuvian.org/src/mplayer/avi_bitrate.pl
This works on AVI files (regardless of codec), so you'd have to remux it first.
Requires perl, mplayer, and gnuplot.I works for me