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Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
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 (...) -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)
Sur d’autres sites (16524)
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capture my webcam and encode to mp4 with ffmpeg, but the x264 works bad
17 septembre 2015, par zhangxm1991here is my version :
ffmpeg version : 2.3.3
libx264 version:142.xI wat to capture my video and use ffmpeg and x264 to a mp4 file. the solution is 320x240.
But i found that the video file is so big. Then i found that the P frame and B frame is very big, even nearly equal to the I frame.I do not know why.here is my code :
c->codec_id = codec_id;
c->bit_rate = 400000;
c->width = 320;
c->height = 240;
c->time_base.den = 10;
c->time_base.num = 1;
c->pix_fmt = AV_PIX_FMT_YUV420P;Here is my program output :
[libx264 @ 0xb6200fc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0xb6200fc0] profile High, level 1.3
[libx264 @ 0xb6200fc0] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - 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=10 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=400 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to '/home/2014_09_12/0002b6429579/5/2014_09_12_18_39_12_600.mp4':
Stream #0:0: Video: h264 (libx264), yuv420p, 320x240, q=-1--1, 400 kb/s, 10 tbc
Stream #0:1: Audio: aac, 8000 Hz, mono, fltp, 32 kb/s
[mp4 @ 0xb62005e0] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
[mp4 @ 0xb62005e0] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
[mp4 @ 0xb62005e0] Encoder did not produce proper pts, making some up.
[libx264 @ 0xb6200fc0] frame I:3 Avg QP: 2.79 size: 72996
[libx264 @ 0xb6200fc0] frame P:383 Avg QP: 0.14 size: 54075
[libx264 @ 0xb6200fc0] frame B:216 Avg QP: 1.95 size: 64784
[libx264 @ 0xb6200fc0] consecutive B-frames: 30.1% 63.2% 6.0% 0.7%
[libx264 @ 0xb6200fc0] mb I I16..4: 16.1% 12.7% 71.2%
[libx264 @ 0xb6200fc0] mb P I16..4: 3.5% 5.1% 15.9% P16..4: 20.3% 22.8% 14.0% 0.0% 0.0% skip:18.3%
[libx264 @ 0xb6200fc0] mb B I16..4: 0.4% 2.5% 8.2% B16..8: 32.6% 19.8% 13.5%
direct:22.2% skip: 0.8% L0:25.5% L1:12.8% BI:61.6%
[libx264 @ 0xb6200fc0] final ratefactor: -32.89
[libx264 @ 0xb6200fc0] 8x8 transform intra:21.0% inter:29.6%
[libx264 @ 0xb6200fc0] coded y,uvDC,uvAC intra: 100.0% 100.0% 100.0% inter: 83.3% 80.9% 80.9%
[libx264 @ 0xb6200fc0] i16 v,h,dc,p: 5% 7% 42% 46%
[libx264 @ 0xb6200fc0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 14% 12% 23% 8% 6% 6% 8% 9% 14%
[libx264 @ 0xb6200fc0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 11% 19% 10% 8% 8% 10% 10% 12%
[libx264 @ 0xb6200fc0] i8c dc,h,v,p: 78% 3% 4% 15%
[libx264 @ 0xb6200fc0] Weighted P-Frames: Y:0.5% UV:0.3%
[libx264 @ 0xb6200fc0] ref P L0: 43.4% 14.6% 19.0% 22.9% 0.1%
[libx264 @ 0xb6200fc0] ref B L0: 63.3% 35.7% 1.1%
[libx264 @ 0xb6200fc0] ref B L1: 97.0% 3.0%
[libx264 @ 0xb6200fc0] kb/s:4.53
[aac @ 0xb6201ba0] 2 frames left in the queue on closing -
FFmpeg tile cropping
24 janvier 2019, par MSH -
FFmpeg ignores scaling options
6 janvier 2019, par SHMSo far i have this command to generate thumbnails from input video :
ffmpeg -ss 3 -i C:\\temp\\5.mp4 -vf "select=gt(scene\,0.4),scale=w=320:h=240:force_original_aspect_ratio=decrease" -frames:v 3 -vsync vfr -vf fps=fps=1/100 5%02d.jpg
based on this question :
https://superuser.com/questions/538112/meaningful-thumbnails-for-a-video-using-ffmpeg
However output images are equal to input video dimensions (ffmpeg ignores passed scale config)