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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
Autres articles (111)
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Problèmes fréquents
10 mars 2010, parPHP et safe_mode activé
Une des principales sources de problèmes relève de la configuration de PHP et notamment de l’activation du safe_mode
La solution consiterait à soit désactiver le safe_mode soit placer le script dans un répertoire accessible par apache pour le site -
Script d’installation automatique de MediaSPIP
25 avril 2011, parAfin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
La documentation de l’utilisation du script d’installation (...) -
List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)
Sur d’autres sites (11431)
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ffmpeg converting .vob to .mp4 --- colors are washed out
28 mai 2021, par BlattlaI am very new to ffmpeg. Currently I am trying to convert old family movies from vob to mp4.
After getting some help I used this command :


ffmpeg -i 1998.vob -codec:v libx264 -crf 17 -pix_fmt yuv420p -codec:a aac -movflags +faststart 1998.mp4



Two things that still bug me. The output is almost 20% larger than the input and the colors are washed out. Although the movies are old and of low quality (grainy, rather flat colors, ...) the colors in the output movie are less intense than in the original one. Larger file size would be ok for me but do you have any idea which part of my command might cause the color issue ?


ffmpeg version 4.4 Copyright (c) 2000-2021 the FFmpeg developers
 built with Apple clang version 12.0.0 (clang-1200.0.32.29)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/4.4_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
 libavutil 56. 70.100 / 56. 70.100
 libavcodec 58.134.100 / 58.134.100
 libavformat 58. 76.100 / 58. 76.100
 libavdevice 58. 13.100 / 58. 13.100
 libavfilter 7.110.100 / 7.110.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 9.100 / 5. 9.100
 libswresample 3. 9.100 / 3. 9.100
 libpostproc 55. 9.100 / 55. 9.100
Input #0, mpeg, from '1995.vob':
 Duration: 00:00:14.64, start: 0.232178, bitrate: 1676252 kb/s
 Stream #0:0[0x1bf]: Data: dvd_nav_packet
 Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, top first), 704x576 [SAR 12:11 DAR 4:3], 25 fps, 25 tbr, 90k tbn, 50 tbc
 Side data:
 cpb: bitrate max/min/avg: 9548800/0/0 buffer size: 1835008 vbv_delay: N/A
 Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 256 kb/s
File '999.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
 Stream #0:1 -> #0:0 (mpeg2video (native) -> h264 (libx264))
 Stream #0:2 -> #0:1 (ac3 (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x7ff666814400] using SAR=12/11
[libx264 @ 0x7ff666814400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7ff666814400] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x7ff666814400] 264 - core 161 r3049 55d517b - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=17.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '999.mp4':
 Metadata:
 encoder : Lavf58.76.100
 Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt470bg, top coded first (swapped)), 704x576 [SAR 12:11 DAR 4:3], q=2-31, 25 fps, 12800 tbn
 Metadata:
 encoder : Lavc58.134.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
 Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s
 Metadata:
 encoder : Lavc58.134.100 aac
frame= 1 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= frame= 59 fps=0.0 q=22.0 size= 256kB time=00:00:02.04 bitrate=1024.2kbits/frame= 75 fps= 72 q=22.0 size= 1024kB time=00:00:02.68 bitrate=3120.9kbits/frame= 95 fps= 61 q=22.0 size= 2048kB time=00:00:03.45 bitrate=4854.6kbits/frame= 112 fps= 54 q=22.0 size= 2816kB time=00:00:04.18 bitrate=5517.2kbits/frame= 131 fps= 51 q=22.0 size= 4096kB time=00:00:04.92 bitrate=6809.0kbits/frame= 149 fps= 48 q=22.0 size= 4864kB time=00:00:05.65 bitrate=7048.3kbits/frame= 169 fps= 47 q=22.0 size= 6144kB time=00:00:06.42 bitrate=7838.3kbits/frame= 183 fps= 44 q=22.0 size= 6912kB time=00:00:07.04 bitrate=8043.1kbits/frame= 203 fps= 43 q=22.0 size= 7936kB time=00:00:07.80 bitrate=8326.3kbits/frame= 221 fps= 42 q=22.0 size= 8960kB time=00:00:08.51 bitrate=8623.2kbits/frame= 240 fps= 42 q=22.0 size= 9984kB time=00:00:09.28 bitrate=8813.5kbits/frame= 261 fps= 41 q=22.0 size= 11264kB time=00:00:10.06 bitrate=9164.0kbits/frame= 278 fps= 40 q=22.0 size= 12288kB time=00:00:10.81 bitrate=9306.9kbits/frame= 294 fps= 40 q=22.0 size= 13568kB time=00:00:11.45 bitrate=9702.3kbits/frame= 311 fps= 39 q=22.0 size= 14592kB time=00:00:12.09 bitrate=9882.4kbits/frame= 329 fps= 39 q=22.0 size= 15616kB time=00:00:12.86 bitrate=9944.5kbits/frame= 347 fps= 39 q=22.0 size= 16640kB time=00:00:13.56 bitrate=10046.8kbitsframe= 366 fps= 38 q=22.0 size= 17920kB time=00:00:14.33 bitrate=10240.0kbitsframe= 385 fps= 38 q=22.0 size= 19200kB time=00:00:15.12 bitrate=10398.9kbitsframe= 400 fps= 38 q=22.0 size= 20224kB time=00:00:15.63 bitrate=10594.9kbitsframe= 418 fps= 38 q=22.0 size= 21504kB time=00:00:16.34 bitrate=10780.1kbitsframe= 431 fps= 37 q=22.0 size= 22528kB time=00:00:16.89 bitrate=10922.7kbitsframe= 447 fps= 37 q=22.0 size= 23808kB time=00:00:17.53 bitrate=11122.0kbitsframe= 466 fps= 37 q=22.0 size= 25088kB time=00:00:18.26 bitrate=11254.5kbitsframe= 479 fps= 36 q=22.0 size= 25856kB time=00:00:18.81 bitrate=11257.1kbitsframe= 497 fps= 36 q=22.0 size= 27136kB time=00:00:19.54 bitrate=11375.8kbitsframe= 513 fps= 36 q=22.0 size= 28416kB time=00:00:20.16 bitrate=11546.8kbitsframe= 530 fps= 36 q=22.0 size= 29440kB time=00:00:20.92 bitrate=11523.9kbitsframe= 546 fps= 36 q=22.0 size= 30464kB time=00:00:21.56 bitrate=11570.9kbitsframe= 564 fps= 36 q=22.0 size= 31744kB time=00:00:22.10 bitrate=11766.1kbitsframe= 580 fps= 36 q=19.0 size= 32512kB time=00:00:22.80 bitrate=11678.8kbitsframe= 598 fps= 36 q=22.0 size= 33792kB time=00:00:23.57 bitrate=11743.1kbitsframe= 614 fps= 35 q=22.0 size= 34560kB time=00:00:24.25 bitrate=11672.0kbitsframe= 630 fps= 35 q=22.0 size= 35328kB time=00:00:24.85 bitrate=11644.6kbitsframe= 646 fps= 35 q=22.0 size= 36096kB time=00:00:25.42 bitrate=11628.3kbitsframe= 662 fps= 35 q=22.0 size= 37376kB time=00:00:26.17 bitrate=11697.1kbitsframe= 682 fps= 35 q=22.0 size= 38400kB time=00:00:26.90 bitrate=11693.6kbitsframe= 699 fps= 35 q=22.0 size= 39424kB time=00:00:27.66 bitrate=11672.2kbitsframe= 719 fps= 35 q=22.0 size= 40704kB time=00:00:28.41 bitrate=11734.5kbitsframe= 736 fps= 35 q=22.0 size= 41728kB time=00:00:29.14 bitrate=11730.3kbitsframe= 753 fps= 35 q=22.0 size= 42752kB time=00:00:29.71 bitrate=11785.2kbitsframe= 764 fps= 35 q=22.0 size= 43520kB time=00:00:30.20 bitrate=11802.0kbitsframe= 776 fps= 35 q=22.0 size= 44544kB time=00:00:30.72 bitrate=11878.4kbitsframe= 786 fps= 34 q=22.0 size= 45312kB time=00:00:31.06 bitrate=11950.4kbitsframe= 799 fps= 34 q=22.0 size= 46080kB time=00:00:31.57 bitrate=11955.9kbitsframe= 815 fps= 34 q=22.0 size= 47104kB time=00:00:32.14 bitrate=12002.6kbitsframe= 830 fps= 34 q=22.0 size= 48128kB time=00:00:32.78 bitrate=12024.2kbitsframe= 839 fps= 33 q=22.0 size= 48640kB time=00:00:33.15 bitrate=12019.2kbitsframe= 847 fps= 33 q=22.0 size= 49152kB time=00:00:33.49 bitrate=12021.9kbitsframe= 858 fps= 33 q=22.0 size= 49920kB time=00:00:33.98 bitrate=12033.5kbitsframe= 867 fps= 32 q=22.0 size= 50688kB time=00:00:34.30 bitrate=12104.6kbitsframe= 880 fps= 32 q=22.0 size= 51456kB time=00:00:34.88 bitrate=12085.1kbitsframe= 898 fps= 32 q=22.0 size= 52480kB time=00:00:35.54 bitrate=12096.2kbitsframe= 913 fps= 32 q=22.0 size= 53504kB time=00:00:36.18 bitrate=12114.1kbitsframe= 923 fps= 32 q=22.0 size= 54016kB time=00:00:36.54 bitrate=12108.7kbitsframe= 940 fps= 32 q=22.0 size= 55040kB time=00:00:37.20 bitrate=12118.9kbitsframe= 958 fps= 32 q=22.0 size= 55808kB time=00:00:37.90 bitrate=12059.8kbitsframe= 975 fps= 32 q=22.0 size= 56832kB time=00:00:38.61 bitrate=12057.2kbitsframe= 994 fps= 32 q=22.0 size= 58112kB time=00:00:39.38 bitrate=12088.3kbitsframe= 1012 fps= 32 q=22.0 size= 59136kB time=00:00:40.02 bitrate=12104.6kbitsframe= 1026 fps= 32 q=22.0 size= 59904kB time=00:00:40.64 bitrate=12075.1kbitsframe= 1038 fps= 31 q=22.0 size= 60928kB time=00:00:41.21 bitrate=12109.9kbitsframe= 1046 fps= 31 q=22.0 size= 61440kB time=00:00:41.53 bitrate=12117.6kbitsframe= 1057 fps= 31 q=22.0 size= 61952kB time=00:00:41.87 bitrate=12119.0kbitsframe= 1071 fps= 31 q=22.0 size= 62976kB time=00:00:42.45 bitrate=12152.2kbitsframe= 1083 fps= 31 q=22.0 size= 63488kB time=00:00:42.90 bitrate=12123.0kbitsframe= 1096 fps= 31 q=22.0 size= 64256kB time=00:00:43.41 bitrate=12125.0kbitsframe= 1110 fps= 31 q=22.0 size= 65280kB time=00:00:44.09 bitrate=12127.5kbitsframe= 1126 fps= 31 q=22.0 size= 66048kB time=00:00:44.62 bitrate=12123.5kbitsframe= 1131 fps= 30 q=19.0 size= 66560kB time=00:00:44.86 bitrate=12153.6kbitsframe= 1147 fps= 30 q=22.0 size= 67584kB time=00:00:45.46 bitrate=12178.4kbitsframe= 1155 fps= 30 q=22.0 size= 68096kB time=00:00:45.88 bitrate=12156.6kbitsframe= 1167 fps= 30 q=22.0 size= 68864kB time=00:00:46.33 bitrate=12174.9kbitsframe= 1175 fps= 30 q=22.0 size= 69376kB time=00:00:46.59 bitrate=12198.0kbitsframe= 1184 fps= 30 q=22.0 size= 70144kB time=00:00:46.93 bitrate=12243.3kbitsframe= 1196 fps= 30 q=22.0 size= 70912kB time=00:00:47.44 bitrate=12243.8kbitsframe= 1211 fps= 30 q=22.0 size= 71936kB time=00:00:48.06 bitrate=12260.7kbitsframe= 1226 fps= 30 q=22.0 size= 73216kB time=00:00:48.66 bitrate=12325.7kbitsframe= 1240 fps= 29 q=22.0 size= 73984kB time=00:00:49.17 bitrate=12325.3kbitsframe= 1256 fps= 29 q=22.0 size= 75264kB time=00:00:49.85 bitrate=12366.9kbitsframe= 1271 fps= 29 q=22.0 size= 76032kB time=00:00:50.43 bitrate=12350.4kbitsframe= 1280 fps= 29 q=22.0 size= 76800kB time=00:00:50.81 bitrate=12380.9kbitsframe= 1288 fps= 29 q=22.0 size= 77312kB time=00:00:51.13 bitrate=12385.4kbitsframe= 1295 fps= 29 q=22.0 size= 77824kB time=00:00:51.39 bitrate=12405.3kbitsframe= 1303 fps= 29 q=22.0 size= 78080kB time=00:00:51.73 bitrate=12364.0kbitsframe= 1316 fps= 29 q=22.0 size= 78848kB time=00:00:52.28 bitrate=12353.2kbitsframe= 1331 fps= 29 q=22.0 size= 79872kB time=00:00:52.86 bitrate=12377.3kbitsframe= 1349 fps= 29 q=22.0 size= 80896kB time=00:00:53.56 bitrate=12371.2kbitsframe= 1364 fps= 29 q=22.0 size= 81920kB time=00:00:54.14 bitrate=12394.5kbitsframe= 1379 fps= 29 q=22.0 size= 82944kB time=00:00:54.74 bitrate=12412.5kbitsframe= 1396 fps= 29 q=22.0 size= 83968kB time=00:00:55.38 bitrate=12420.5kbitsframe= 1417 fps= 29 q=22.0 size= 84992kB time=00:00:56.27 bitrate=12371.9kbitsframe= 1438 fps= 29 q=22.0 size= 86016kB time=00:00:57.10 bitrate=12338.5kbitsframe= 1458 fps= 29 q=22.0 size= 87040kB time=00:00:57.92 bitrate=12310.6kbitsframe= 1478 fps= 29 q=22.0 size= 88064kB time=00:00:58.64 bitrate=12301.4kbitsframe= 1498 fps= 29 q=22.0 size= 89088kB time=00:00:59.47 bitrate=12270.4kbits[mp4 @ 0x7ff666813200] Starting second pass: moving the moov atom to the beginning of the file
frame= 1500 fps= 28 q=-1.0 Lsize= 91853kB time=00:00:59.98 bitrate=12543.2kbits/s speed=1.13x 
video:90866kB audio:941kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.049858%
[libx264 @ 0x7ff666814400] frame I:12 Avg QP:18.57 size:116766
[libx264 @ 0x7ff666814400] frame P:426 Avg QP:20.52 size: 87768
[libx264 @ 0x7ff666814400] frame B:1062 Avg QP:23.56 size: 51088
[libx264 @ 0x7ff666814400] consecutive B-frames: 2.5% 6.4% 9.0% 82.1%
[libx264 @ 0x7ff666814400] mb I I16..4: 1.0% 87.7% 11.3%
[libx264 @ 0x7ff666814400] mb P I16..4: 0.5% 23.0% 4.2% P16..4: 25.2% 30.8% 16.1% 0.0% 0.0% skip: 0.1%
[libx264 @ 0x7ff666814400] mb B I16..4: 0.1% 1.3% 0.6% B16..8: 37.5% 21.2% 9.4% direct:28.6% skip: 1.4% L0:31.5% L1:22.8% BI:45.8%
[libx264 @ 0x7ff666814400] 8x8 transform intra:80.8% inter:75.0%
[libx264 @ 0x7ff666814400] coded y,uvDC,uvAC intra: 97.5% 95.0% 63.3% inter: 90.0% 62.4% 12.3%
[libx264 @ 0x7ff666814400] i16 v,h,dc,p: 36% 46% 6% 12%
[libx264 @ 0x7ff666814400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 16% 25% 5% 6% 7% 7% 8% 12%
[libx264 @ 0x7ff666814400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 29% 12% 6% 7% 6% 10% 7% 13%
[libx264 @ 0x7ff666814400] i8c dc,h,v,p: 36% 30% 20% 14%
[libx264 @ 0x7ff666814400] Weighted P-Frames: Y:29.3% UV:14.1%
[libx264 @ 0x7ff666814400] ref P L0: 39.8% 15.4% 21.2% 19.9% 3.8%
[libx264 @ 0x7ff666814400] ref B L0: 76.4% 19.1% 4.5%
[libx264 @ 0x7ff666814400] ref B L1: 90.7% 9.3%
[libx264 @ 0x7ff666814400] kb/s:12406.19
[aac @ 0x7ff666815c00] Qavg: 181.322



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Revision 37408 : déplacement de chaines de langue Faire refonctionner l’encodage sonore
18 avril 2010, par kent1@… — Logdéplacement de chaines de langue
Faire refonctionner l’encodage sonore -
Revision 37427 : mmmh c’est l’inverse manuel écrit brutalement ... non manuel d’une manière ...
19 avril 2010, par kent1@… — Logmmmh c’est l’inverse manuel écrit brutalement ... non manuel d’une manière plus smooth