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Médias (1)
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (46)
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Mise à jour de la version 0.1 vers 0.2
24 juin 2013, parExplications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...) -
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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Ecrire une actualité
21 juin 2013, parPrésentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
Vous pouvez personnaliser le formulaire de création d’une actualité.
Formulaire de création d’une actualité Dans le cas d’un document de type actualité, les champs proposés par défaut sont : Date de publication ( personnaliser la date de publication ) (...)
Sur d’autres sites (5362)
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arm : Detect 32 bit cpu features on ARMv8 when running on a 64 bit kernel
23 juin 2014, par Martin Storsjöarm : Detect 32 bit cpu features on ARMv8 when running on a 64 bit kernel
When running on a 64 bit kernel, /proc/cpuinfo lists different
optional features than on 32 bit kernels (because some of them
are mandatory in the 64 bit implemenations).The kernel does list the old features properly if they are queried
via /proc/self/auxv though - however this file is not always readable
(e.g. on most android systems). The getauxval function could also
provide the same info as /proc/self/auxv even if this file isn’t
readable, but this function is not always available (and thus would
need to be loaded with dlsym for compatibility with older android
versions).The android cpufeatures library does this slightly differently,
by assuming that these are available if the "CPU architecture"
line is >= 8, see [1] for details.It has been suggested to include the old, non-optional features in
/proc/cpuinfo as well, but that suggested patch never was merged.
See [2] for the discussion around this suggestion.[1] https://android-review.googlesource.com/91380
[2] http://marc.info/?l=linux-arm-kernel&m=139087240101974Signed-off-by : Martin Storsjö <martin@martin.st>
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When capturing input with ffmpeg can't set video bitrate
11 mai 2014, par EmanueleWhen capturing input from FFmpeg with following command line :
ffmpeg -f x11grab -r 30 -s 1920x1080 -i :0.0 -vcodec mpeg4 -b:v 10000k -flags +aic+mv4 -f alsa -ac 2 -i pulse -strict experimental test.mp4
this is the output I get :ffmpeg version 0.8.10-4:0.8.10-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Feb 6 2014 20:56:59 with gcc 4.6.3 *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be removed in a future release. Please use avconv instead. [x11grab @ 0x1b1c7a0] device : :0.0 -> display : :0.0 x : 0 y : 0 width : 1920 height : 1080 [x11grab @ 0x1b1c7a0] shared memory extension found [x11grab @ 0x1b1c7a0] Estimating duration from bitrate, this may be inaccurate Input #0, x11grab, from ’:0.0’ : Duration : N/A, start : 1399805986.592884, bitrate : 1990656 kb/s Stream #0.0 : Video : rawvideo, bgra, 1920x1080, 1990656 kb/s, 30 tbr, 1000k tbn, 30 tbc [alsa @ 0x1b2c600] capture with some ALSA plugins, especially dsnoop, may hang. [alsa @ 0x1b2c600] Estimating duration from bitrate, this may be inaccurate Input #1, alsa, from ’pulse’ : Duration : N/A, start : 1399805986.561124, bitrate : N/A Stream #1.0 : Audio : pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s File ’test.mp4’ already exists. Overwrite ? [y/N] y Incompatible pixel format ’bgra’ for codec ’mpeg4’, auto-selecting format ’yuv420p’ [buffer @ 0x1b4d840] w:1920 h:1080 pixfmt:bgra [avsink @ 0x1b40480] auto-inserting filter ’auto-inserted scaler 0’ between the filter ’src’ and the filter ’out’ [scale @ 0x1b1c6e0] w:1920 h:1080 fmt:bgra -> w:1920 h:1080 fmt:yuv420p flags:0x4 Output #0, mp4, to ’test.mp4’ : Metadata : encoder : Lavf53.21.1 Stream #0.0 : Video : mpeg4, yuv420p, 1920x1080, q=2-31, 200 kb/s, 30 tbn, 30 tbc Stream #0.1 : Audio : aac, 48000 Hz, 2 channels, s16, 200 kb/s Stream mapping : Stream #0.0 -> #0.0 Stream #1.0 -> #0.1 Press ctrl-c to stop encoding ^Cframe= 1283 fps= 42 q=31.0 Lsize= 10882kB time=42.71 bitrate=2087.3kbits/s dup=473 drop=70 video:9875kB audio:980kB global headers:0kB muxing overhead 0.251384% Received signal 2 : terminating. ema@scv : $ ./capvideo.sh ffmpeg version 0.8.10-4:0.8.10-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Feb 6 2014 20:56:59 with gcc 4.6.3 *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be removed in a future release. Please use avconv instead. [x11grab @ 0x24667a0] device : :0.0 -> display : :0.0 x : 0 y : 0 width : 1920 height : 1080 [x11grab @ 0x24667a0] shared memory extension found [x11grab @ 0x24667a0] Estimating duration from bitrate, this may be inaccurate Input #0, x11grab, from ’:0.0’ : Duration : N/A, start : 1399806153.224758, bitrate : 1990656 kb/s Stream #0.0 : Video : rawvideo, bgra, 1920x1080, 1990656 kb/s, 30 tbr, 1000k tbn, 30 tbc [alsa @ 0x2476600] capture with some ALSA plugins, especially dsnoop, may hang. [alsa @ 0x2476600] Estimating duration from bitrate, this may be inaccurate Input #1, alsa, from ’pulse’ : Duration : N/A, start : 1399806153.198090, bitrate : N/A Stream #1.0 : Audio : pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s File ’test.mp4’ already exists. Overwrite ? [y/N] y Incompatible pixel format ’bgra’ for codec ’mpeg4’, auto-selecting format ’yuv420p’ [buffer @ 0x2497840] w:1920 h:1080 pixfmt:bgra [avsink @ 0x2497c00] auto-inserting filter ’auto-inserted scaler 0’ between the filter ’src’ and the filter ’out’ [scale @ 0x24a9680] w:1920 h:1080 fmt:bgra -> w:1920 h:1080 fmt:yuv420p flags:0x4 Output #0, mp4, to ’test.mp4’ : Metadata : encoder : Lavf53.21.1 Stream #0.0 : Video : mpeg4, yuv420p, 1920x1080, q=2-31, 200 kb/s, 30 tbn, 30 tbc Stream #0.1 : Audio : aac, 48000 Hz, 2 channels, s16, 200 kb/s Stream mapping : Stream #0.0 -> #0.0 Stream #1.0 -> #0.1 Press ctrl-c to stop encoding ^Cframe= 229 fps= 36 q=24.8 Lsize= 2316kB time=7.59 bitrate=2497.9kbits/s dup=43 drop=4 video:2134kB audio:176kB global headers:0kB muxing overhead 0.253411% Received signal 2 : terminating.
As you can see the video is being saved with 200kbs no matter what option I set ; what am I doing wrong ?
I’m running this on Ubuntu 12.04, ffmpeg isffmpeg version 0.8.10-4:0.8.10-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Feb 6 2014 20:56:59 with gcc 4.6.3
.Cheers
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avdevice/decklink_dec : properly initialize no_video variable
10 décembre 2016, par Marton Balint