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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 (77)
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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 (...) -
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. -
La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...)
Sur d’autres sites (8586)
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Samsung S3 : 'Cannot play Video' on stock Video player
18 mars 2013, par d33pikaI am unable to play a mp4 video(H.264 Baseline, AAC) on Samsung S3, Android Version : 4.1.1, stock video player but plays on VLC. The same video plays on Galaxy Beam, Android Version : 2.3.6, stock Video Player. I want to figure out why it does not play on S3. I ran ffprobe and mediainfo on the fie :
ffprobe results :
ffprobe version 0.11.1 Copyright (c) 2007-2012 the FFmpeg developers
built on Jan 25 2013 15:16:27 with llvm_gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)
configuration: --prefix=/usr/local/Cellar/ffmpeg/0.11.1 --enable-shared --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --cc=/usr/bin/llvm-gcc --host-cflags='-Os -w -pipe -march=core2 -msse4 -mmacosx-version-min=10.7' --host-ldflags=-L/usr/local/lib --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
libavutil 51. 54.100 / 51. 54.100
libavcodec 54. 23.100 / 54. 23.100
libavformat 54. 6.100 / 54. 6.100
libavdevice 54. 0.100 / 54. 0.100
libavfilter 2. 77.100 / 2. 77.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 15.100 / 0. 15.100
libpostproc 52. 0.100 / 52. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '86535_360p_1301310230.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: isomavc1
creation_time : 2013-01-31 02:36:22
Duration: 00:03:49.53, start: 0.000000, bitrate: 799 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 699 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc
Metadata:
creation_time : 2013-01-31 02:34:00
handler_name : GPAC ISO Video Handler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 96000 Hz, stereo, s16, 95 kb/s
Metadata:
creation_time : 2013-01-31 02:36:22
handler_name : GPAC ISO Audio HandlerMedia info results :
General
Complete name : a.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 21.9 MiB
Duration : 3mn 49s
Overall bit rate mode : Variable
Overall bit rate : 799 Kbps
Encoded date : UTC 2013-01-31 02:36:22
Tagged date : UTC 2013-01-31 02:36:22
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L3.0
Format settings, CABAC : No
Format settings, ReFrames : 3 frames
Format settings, GOP : M=1, N=30
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3mn 49s
Bit rate : 700 Kbps
Maximum bit rate : 2 721 Kbps
Width : 640 pixels
Height : 360 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.127
Stream size : 19.1 MiB (88%)
Writing library : Zencoder Video Encoding System
Encoded date : UTC 2013-01-31 02:34:00
Tagged date : UTC 2013-01-31 02:36:22
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 3mn 49s
Bit rate mode : Variable
Bit rate : 96.0 Kbps
Maximum bit rate : 121 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 96.0 KHz
Compression mode : Lossy
Stream size : 2.62 MiB (12%)
Encoded date : UTC 2013-01-31 02:36:22
Tagged date : UTC 2013-01-31 02:36:22I suspect the video player is more stricter on some codec header values. The level is set to 3.0 and this should be correct. Any help in figuring this out is appreciated !
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Revision 382f86f945 : Improve the performance by caching the left_mi and right_mi in macroblockd. Thi
5 décembre 2014, par hkuangChanged Paths :
Modify /vp9/common/vp9_blockd.h
Modify /vp9/common/vp9_onyxc_int.h
Modify /vp9/common/vp9_pred_common.c
Modify /vp9/common/vp9_pred_common.h
Modify /vp9/encoder/vp9_bitstream.c
Modify /vp9/encoder/vp9_rdopt.c
Improve the performance by caching the left_mi and right_mi in macroblockd.This improve the deocde performance by 2% on Nexus 7 2013.
Change-Id : Ie9c4ba0371a149eb7fddc687a6a291c17298d6c3
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FFmpeg returning an error - What does it mean ?
19 mars 2013, par user1031947I am using FFmpeg, libmp3lame & libx264 along with the node fluent-ffmpeg module. This is my first foray into processing uploaded videos.
From node, I use the following code to process an uploaded video :
var proc = new ffmpeg({ source: src, nolog: true })
.usingPreset( "podcast" )
.withAudioCodec( "libmp3lame" )
.saveToFile( dest, function( retcode, err ){
if( err ) throw err;
...
});When I try to process a video, this fails with the following error, which I don't understand. I am hoping someone here can help point me in the right direction. Thanks !
> ffmpeg version 0.8.5-6:0.8.5-1, Copyright (c) 2000-2012 the Libav
> developers built on Jan 13 2013 12:05:48 with gcc 4.7.2
> *** THIS PROGRAM IS DEPRECATED *** This program is only provided for compatibility and will be removed in a future release. Please use
> avconv instead.
>
> Seems stream 0 codec frame rate differs from container frame rate:
> 5994.00 (5994/1) -> 29.97 (2997/100) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
> '/home/ssp/resources/tmp/32111bf4217e87c23328ec81c56c7d02':
> Metadata:
> major_brand : M4VP
> minor_version : 1
> compatible_brands: M4VPM4A mp42isom
> creation_time : 2008-08-26 17:28:47 Duration: 00:00:08.01, start: 0.000000, bitrate: 944 kb/s
> Stream #0.0(eng): Video: h264 (Constrained Baseline), yuv420p, 480x272, 815 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 5994 tbc
> Metadata:
> creation_time : 2008-08-26 17:28:47
> Stream #0.1(eng): Audio: aac, 44100 Hz, stereo, s16, 124 kb/s
> Metadata:
> creation_time : 2008-08-26 17:28:47 [buffer @ 0xb685a0] w:480 h:272 pixfmt:yuv420p [scale @ 0xb63280] w:480 h:272 fmt:yuv420p ->
> w:320 h:176 fmt:yuv420p flags:0x4 [libx264 @ 0xb67c20] VBV maxrate
> unspecified, assuming CBR [libx264 @ 0xb67c20] using cpu capabilities:
> MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX [libx264 @ 0xb67c20]
> profile Main, level 1.3 Output #0, m4v, to
> '/home/ssp/resources/users/11/026468c8f4ea1beee0a585ebc2208137.m4v':
> Metadata:
> major_brand : M4VP
> minor_version : 1
> compatible_brands: M4VPM4A mp42isom
> creation_time : 2008-08-26 17:28:47
> encoder : Lavf53.21.1
> Stream #0.0(eng): Video: libx264, yuv420p, 320x176, q=10-51, 512 kb/s, 90k tbn, 29.97 tbc
> Metadata:
> creation_time : 2008-08-26 17:28:47
> Stream #0.1(eng): Audio: libmp3lame, 44100 Hz, 1 channels, s16, 128 kb/s
> Metadata:
> creation_time : 2008-08-26 17:28:47 Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press ctrl-c to stop encoding frame= 240 fps=154 q=11.0 Lsize= 642kB time=7.97 bitrate=
> 659.3kbits/s video:516kB audio:126kB global headers:0kB muxing overhead 0.000000% frame I:1 Avg QP:15.35 size: 9995 [libx264 @
> 0xb67c20] frame P:77 Avg QP:13.25 size: 5419 [libx264 @ 0xb67c20]
> frame B:162 Avg QP:18.31 size: 625 [libx264 @ 0xb67c20]
> consecutive B-frames: 2.5% 12.5% 30.0% 55.0% [libx264 @ 0xb67c20] mb
> I I16..4: 9.1% 0.0% 90.9% [libx264 @ 0xb67c20] mb P I16..4: 2.1%
> 0.0% 2.8% P16..4: 18.0% 29.9% 44.8% 0.0% 0.0% skip: 2.3% [libx264 @ 0xb67c20] mb B I16..4: 0.1% 0.0% 0.0% B16..8: 35.2%
> 20.2% 1.9% direct:14.5% skip:28.1% L0:26.3% L1:38.1% BI:35.6% [libx264 @ 0xb67c20] coded y,uvDC,uvAC intra: 83.7% 91.7% 84.7% inter:
> 27.7% 43.4% 13.9% [libx264 @ 0xb67c20] i16 v,h,dc,p: 20% 29% 42% 9% [libx264 @ 0xb67c20] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 17% 29% 20% 4%
> 8% 6% 9% 3% 4% [libx264 @ 0xb67c20] i8c dc,h,v,p: 60% 19% 16% 5%
> [libx264 @ 0xb67c20] Weighted P-Frames: Y:2.6% UV:0.0% [libx264 @
> 0xb67c20] ref P L0: 75.6% 13.5% 8.0% 2.8% 0.1% [libx264 @ 0xb67c20]
> ref B L0: 94.5% 5.5% [libx264 @ 0xb67c20] kb/s:528.00