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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (94)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)
Sur d’autres sites (10612)
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What codec do I need to convert .wav to .mp3 with ffmpeg ?
19 septembre 2011, par LedZeppelinI am able to convert from .mp3 files to .wav files.
me@me-desktop:~$ ffmpeg -i Desktop/input.mp3 Desktop/output.wav
FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1.1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --extra-version=4:0.5.1-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
libavutil 49.15. 0 / 49.15. 0
libavcodec 52.20. 1 / 52.20. 1
libavformat 52.31. 0 / 52.31. 0
libavdevice 52. 1. 0 / 52. 1. 0
libavfilter 0. 4. 0 / 0. 4. 0
libswscale 0. 7. 1 / 0. 7. 1
libpostproc 51. 2. 0 / 51. 2. 0
built on Mar 31 2011 18:53:20, gcc: 4.4.3
[mp3 @ 0x9449510]mdb:511, lastbuf:0 skipping granule 0
Last message repeated 1 times
[mp3 @ 0x9449510]mdb:511, lastbuf:0 skipping granule 1
Last message repeated 1 times
Input #0, mp3, from 'Desktop/input.mp3':
Duration: 00:04:45.31, start: 0.000000, bitrate: 256 kb/s
Stream #0.0: Audio: mp3, 48000 Hz, stereo, s16, 256 kb/s
Output #0, wav, to 'Desktop/output.wav':
Stream #0.0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop encoding
[mp3 @ 0x9449510]mdb:511, lastbuf:0 skipping granule 0
Last message repeated 1 times
[mp3 @ 0x9449510]mdb:511, lastbuf:0 skipping granule 1
size= 42944kB time=229.03 bitrate=1536.0kbits/s
video:0kB audio:42944kB global headers:0kB muxing overhead 0.000100%However when I try to convert the same .wav file back to an .mp3 I get the following error : Unsupported codec for output stream #0.0
me@me-desktop:~$ ffmpeg -i Desktop/output.wav Desktop/output2.mp3
FFmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1.1, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --extra-version=4:0.5.1-1ubuntu1.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-runtime-cpudetect --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
libavutil 49.15. 0 / 49.15. 0
libavcodec 52.20. 1 / 52.20. 1
libavformat 52.31. 0 / 52.31. 0
libavdevice 52. 1. 0 / 52. 1. 0
libavfilter 0. 4. 0 / 0. 4. 0
libswscale 0. 7. 1 / 0. 7. 1
libpostproc 51. 2. 0 / 51. 2. 0
built on Mar 31 2011 18:53:20, gcc: 4.4.3
Input #0, wav, from 'Desktop/output.wav':
Duration: 00:03:49.03, bitrate: 1536 kb/s
Stream #0.0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
Output #0, mp3, to 'Desktop/output2.mp3':
Stream #0.0: Audio: 0x0000, 48000 Hz, stereo, s16, 64 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Unsupported codec for output stream #0.0I've already tried installing unstripped-51 per a suggestion from a previous question but I am still unable to convert from .wav to .mp3
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Revision 4664b219a2 : vp9_ratectrl : change ARF overlays rate correction factor ARF overlays now use t
6 avril 2014, par Guillaume MartresChanged Paths :
Modify /vp9/encoder/vp9_ratectrl.c
vp9_ratectrl : change ARF overlays rate correction factorARF overlays now use the same rate correction factor as regular inter
frames, further testing would be needed to see if it makes sense to use
a completely separate rate correction factor for ARF overlays.$ vpxenc —cpu-used=5 —fps=50/1 —target-bitrate=2000
parkjoy.y4m -o out.webm
=> Before : 3356 kb/s
=> After : 2271 kb/sChange-Id : I73e4defa615ba7a8a2bdb845864f4b1721cbbffe
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ffmpeg trying to remove the first few seconds of video
21 octobre 2011, par zeroasteriskI'm trying to remove a few seconds off the front of a video stream (audio already excluded), and I'm getting strange results : I would think that for every second I increase -ss by, the resulting file would be a second shorter... that doesn't seem to be the case.
original ==> 01:04:52.84
-ss 19 ==> 01:04:42.84 (diff = 10) [command history shown below]
-ss 20 ==> 01:04:32.84 (diff = 20) [command history shown below]
-ss 21 ==> 01:04:32.84 (diff = 20)
-ss 25 ==> 01:04:32.84 (diff = 20)
-ss 0:0:25.0 ==> 01:04:32.84 (diff = 20)
-ss 0:0:25.5 ==> 01:04:32.84 (diff = 20) [command history shown below]Command :
ffmpeg -ss # -i temp.mp4 -y -vcodec copy temp_croppedFromStart.mp4
Here's the command history for 19 & 20
# ffmpeg -ss 19 -i temp.mp4 -y -vcodec copy temp_croppedFromStart.mp4; ffmpeg -i temp.mp4 2>&1 | grep Duration; ffmpeg -i temp_croppedFromStart.mp4 2>&1 | grep Duration
ffmpeg version N-31809-g9acffed, Copyright (c) 2000-2011 the FFmpeg developers
built on Aug 10 2011 21:25:11 with gcc 4.4.5
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab
libavutil 51. 11. 1 / 51. 11. 1
libavcodec 53. 10. 0 / 53. 10. 0
libavformat 53. 6. 0 / 53. 6. 0
libavdevice 53. 2. 0 / 53. 2. 0
libavfilter 2. 28. 1 / 2. 28. 1
libswscale 2. 0. 0 / 2. 0. 0
libpostproc 51. 2. 0 / 51. 2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'temp.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.6.0
Duration: 01:04:52.84, start: 0.000000, bitrate: 553 kb/s
Stream #0.0(und): Video: h264 (Constrained Baseline), yuv420p, 960x640, 552 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
Output #0, mp4, to 'temp_croppedFromStart.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.6.0
Stream #0.0(und): Video: libx264, yuv420p, 960x640, q=2-31, 552 kb/s, 25 tbn, 25 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
frame=97071 fps=42523 q=-1.0 Lsize= 262684kB time=01:04:33.84 bitrate= 555.5kbits/s
video:261923kB audio:0kB global headers:0kB muxing overhead 0.290418%
Duration: 01:04:52.84, start: 0.000000, bitrate: 553 kb/s
Duration: 01:04:42.84, start: 0.000000, bitrate: 554 kb/s
# ffmpeg -ss 20 -i temp.mp4 -y -vcodec copy temp_croppedFromStart.mp4; ffmpeg -i temp.mp4 2>&1 | grep Duration; ffmpeg -i temp_croppedFromStart.mp4 2>&1 | grep Duration
ffmpeg version N-31809-g9acffed, Copyright (c) 2000-2011 the FFmpeg developers
built on Aug 10 2011 21:25:11 with gcc 4.4.5
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab
libavutil 51. 11. 1 / 51. 11. 1
libavcodec 53. 10. 0 / 53. 10. 0
libavformat 53. 6. 0 / 53. 6. 0
libavdevice 53. 2. 0 / 53. 2. 0
libavfilter 2. 28. 1 / 2. 28. 1
libswscale 2. 0. 0 / 2. 0. 0
libpostproc 51. 2. 0 / 51. 2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'temp.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.6.0
Duration: 01:04:52.84, start: 0.000000, bitrate: 553 kb/s
Stream #0.0(und): Video: h264 (Constrained Baseline), yuv420p, 960x640, 552 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
Output #0, mp4, to 'temp_croppedFromStart.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.6.0
Stream #0.0(und): Video: libx264, yuv420p, 960x640, q=2-31, 552 kb/s, 25 tbn, 25 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
frame=96821 fps=47168 q=-1.0 Lsize= 262003kB time=01:04:32.84 bitrate= 554.2kbits/s
video:261244kB audio:0kB global headers:0kB muxing overhead 0.290410%
Duration: 01:04:52.84, start: 0.000000, bitrate: 553 kb/s
Duration: 01:04:32.84, start: 0.000000, bitrate: 554 kb/s
# ffmpeg -ss 0:0:25.5 -i temp.mp4 -y -vcodec copy temp_croppedFromStart.mp4; ffmpeg -i temp.mp4 2>&1 | grep Duration; ffmpeg -i temp_croppedFromStart.mp4 2>&1 | grep Duration
ffmpeg version N-31809-g9acffed, Copyright (c) 2000-2011 the FFmpeg developers
built on Aug 10 2011 21:25:11 with gcc 4.4.5
configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-libfaac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab
libavutil 51. 11. 1 / 51. 11. 1
libavcodec 53. 10. 0 / 53. 10. 0
libavformat 53. 6. 0 / 53. 6. 0
libavdevice 53. 2. 0 / 53. 2. 0
libavfilter 2. 28. 1 / 2. 28. 1
libswscale 2. 0. 0 / 2. 0. 0
libpostproc 51. 2. 0 / 51. 2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'temp.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.6.0
Duration: 01:04:52.84, start: 0.000000, bitrate: 553 kb/s
Stream #0.0(und): Video: h264 (Constrained Baseline), yuv420p, 960x640, 552 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
Output #0, mp4, to 'temp_croppedFromStart.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01 00:00:00
encoder : Lavf53.6.0
Stream #0.0(und): Video: libx264, yuv420p, 960x640, q=2-31, 552 kb/s, 25 tbn, 25 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
frame=96821 fps=45920 q=-1.0 Lsize= 262003kB time=01:04:27.32 bitrate= 555.0kbits/s
video:261244kB audio:0kB global headers:0kB muxing overhead 0.290424%
Duration: 01:04:52.84, start: 0.000000, bitrate: 553 kb/s
Duration: 01:04:32.84, start: 0.000000, bitrate: 554 kb/s