Recherche avancée

Médias (3)

Mot : - Tags -/image

Autres articles (79)

  • La sauvegarde automatique de canaux SPIP

    1er avril 2010, par

    Dans 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 (...)

  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • Script d’installation automatique de MediaSPIP

    25 avril 2011, par

    Afin 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 (...)

Sur d’autres sites (6592)

  • ffmpeg not setting GOP size for x264

    5 juillet 2012, par Chris Robinson

    Can someone please explain to me why the following settings :

    ffmpeg -i test.avi -vcodec libx264 -g 2 -keyint_min 1 -sc_threshold 100000000 -bf 1 test.mp4

    produces the following output :

    ffmpeg version N-41668-g564bb24 Copyright (c) 2000-2012 the FFmpeg developers
    
built on Jun 17 2012 20:18:05 with gcc 4.6.3
    
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --ena  libavutil      51. 58.100 / 51. 58.100
    
  libavcodec     54. 25.100 / 54. 25.100
    
  libavformat    54.  6.101 / 54.  6.101
    
  libavdevice    54.  0.100 / 54.  0.100
    
  libavfilter     2. 81.100 /  2. 81.100
    
  libswscale      2.  1.100 /  2.  1.100
    
  libswresample   0. 15.100 /  0. 15.100
    
  libpostproc    52.  0.100 / 52.  0.100
    
Input #0, avi, from 'test.avi':
    
  Metadata:
    
    encoder         : Lavf54.6.101
    
  Duration: 00:00:01.70, start: 0.000000, bitrate: 4258 kb/s
    
Stream #0:0: Video: mpeg4 (Simple Profile) (DIVX / 0x58564944), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 30k tbc
    
Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16, 128 kb/s
    
[buffer @ 0000000004115600] w:1280 h:720 pixfmt:yuv420p tb:1001/30000 fr:30000/1001 sar:1/1 sws_param:flags=2
    
[ffmpeg_buffersink @ 00000000041157a0] No opaque field provided
    
[libx264 @ 000000000411f120] using SAR=1/1
    
[libx264 @ 000000000411f120] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
    
[libx264 @ 000000000411f120] profile High, level 3.1
    
[libx264 @ 000000000411f120] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=36 lookahead_threads=6 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 keOutput #0, mp4, to 'test.mp4':
    
  Metadata:
    
    encoder         : Lavf54.6.101
    
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30k tbn, 29.97 tbc
    
    Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mpeg4 -> libx264)
    
  Stream #0:1 -> #0:1 (mp3 -> libvo_aacenc)
    
Press [q] to stop, [?] for help
    
[libvo_aacenc @ 0000000001ebe240] Que input is backward in time
    
Last message repeated 8 times
    
frame=   35 fps=0.0 q=-1.0 Lsize=     466kB time=00:00:01.10 bitrate=3466.6kbits/s dup=1 drop=0    
    

    
video:436kB audio:28kB global headers:0kB muxing overhead 0.558509%
    
[libx264 @ 000000000411f120] frame I:1     Avg QP:24.93  size: 92398
    
[libx264 @ 000000000411f120] frame P:28    Avg QP:26.82  size: 12010
    
[libx264 @ 000000000411f120] frame B:6     Avg QP:30.37  size:  2764
    
[libx264 @ 000000000411f120] consecutive B-frames: 74.3%  5.7%  8.6% 11.4%
    
[libx264 @ 000000000411f120] mb I  I16..4: 41.5% 40.1% 18.4%
    
[libx264 @ 000000000411f120] mb P  I16..4:  3.9%  1.4%  0.6%  P16..4: 14.3%  4.7%  3.2%  0.0%  0.0%    skip:72.0%
    
[libx264 @ 000000000411f120] mb B  I16..4:  1.1%  0.4%  0.1%  B16..8: 14.2%  2.8%  0.6%  direct: 1.1%  skip:79.8%  L0:49.8% L1:39.5% BI:10.8%
    
[libx264 @ 000000000411f120] 8x8 transform intra:29.9% inter:76.4%
    
[libx264 @ 000000000411f120] coded y,uvDC,uvAC intra: 31.1% 34.4% 18.7% inter: 10.2% 6.3% 3.0%
    
[libx264 @ 000000000411f120] i16 v,h,dc,p: 62% 34%  3%  0%
    
[libx264 @ 000000000411f120] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 23% 38%  4%  4%  3%  3%  2%  5%
    
[libx264 @ 000000000411f120] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 40% 35% 16%  1%  2%  2%  1%  1%  1%
    
[libx264 @ 000000000411f120] i8c dc,h,v,p: 52% 20% 24%  3%
    
[libx264 @ 000000000411f120] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 000000000411f120] ref P L0: 70.5% 10.1% 12.1%  7.3%
    
[libx264 @ 000000000411f120] ref B L0: 81.1% 16.9%  2.0%
    
[libx264 @ 000000000411f120] ref B L1: 89.7% 10.3%
    
[libx264 @ 000000000411f120] kb/s:3050.18

    Why am I not getting an I-Frame every second frame ? Is there something else I can set to do enforce this ? If not, can you suggest how to do this using the mpeg4 codec. It's vital that I can extract what type of frame has been encoded during the encoding process and that I can set a specific GOP structure.

  • ffmpeg not setting GOP size for x264

    5 juillet 2012, par Chris Robinson

    Can someone please explain to me why the following settings :

    ffmpeg -i test.avi -vcodec libx264 -g 2 -keyint_min 1 -sc_threshold 100000000 -bf 1 test.mp4

    produces the following output :

    ffmpeg version N-41668-g564bb24 Copyright (c) 2000-2012 the FFmpeg developers
    
built on Jun 17 2012 20:18:05 with gcc 4.6.3
    
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --ena  libavutil      51. 58.100 / 51. 58.100
    
  libavcodec     54. 25.100 / 54. 25.100
    
  libavformat    54.  6.101 / 54.  6.101
    
  libavdevice    54.  0.100 / 54.  0.100
    
  libavfilter     2. 81.100 /  2. 81.100
    
  libswscale      2.  1.100 /  2.  1.100
    
  libswresample   0. 15.100 /  0. 15.100
    
  libpostproc    52.  0.100 / 52.  0.100
    
Input #0, avi, from 'test.avi':
    
  Metadata:
    
    encoder         : Lavf54.6.101
    
  Duration: 00:00:01.70, start: 0.000000, bitrate: 4258 kb/s
    
Stream #0:0: Video: mpeg4 (Simple Profile) (DIVX / 0x58564944), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 29.97 tbn, 30k tbc
    
Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, s16, 128 kb/s
    
[buffer @ 0000000004115600] w:1280 h:720 pixfmt:yuv420p tb:1001/30000 fr:30000/1001 sar:1/1 sws_param:flags=2
    
[ffmpeg_buffersink @ 00000000041157a0] No opaque field provided
    
[libx264 @ 000000000411f120] using SAR=1/1
    
[libx264 @ 000000000411f120] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
    
[libx264 @ 000000000411f120] profile High, level 3.1
    
[libx264 @ 000000000411f120] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=36 lookahead_threads=6 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 keOutput #0, mp4, to 'test.mp4':
    
  Metadata:
    
    encoder         : Lavf54.6.101
    
    Stream #0:0: Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 30k tbn, 29.97 tbc
    
    Stream #0:1: Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mpeg4 -> libx264)
    
  Stream #0:1 -> #0:1 (mp3 -> libvo_aacenc)
    
Press [q] to stop, [?] for help
    
[libvo_aacenc @ 0000000001ebe240] Que input is backward in time
    
Last message repeated 8 times
    
frame=   35 fps=0.0 q=-1.0 Lsize=     466kB time=00:00:01.10 bitrate=3466.6kbits/s dup=1 drop=0    
    

    
video:436kB audio:28kB global headers:0kB muxing overhead 0.558509%
    
[libx264 @ 000000000411f120] frame I:1     Avg QP:24.93  size: 92398
    
[libx264 @ 000000000411f120] frame P:28    Avg QP:26.82  size: 12010
    
[libx264 @ 000000000411f120] frame B:6     Avg QP:30.37  size:  2764
    
[libx264 @ 000000000411f120] consecutive B-frames: 74.3%  5.7%  8.6% 11.4%
    
[libx264 @ 000000000411f120] mb I  I16..4: 41.5% 40.1% 18.4%
    
[libx264 @ 000000000411f120] mb P  I16..4:  3.9%  1.4%  0.6%  P16..4: 14.3%  4.7%  3.2%  0.0%  0.0%    skip:72.0%
    
[libx264 @ 000000000411f120] mb B  I16..4:  1.1%  0.4%  0.1%  B16..8: 14.2%  2.8%  0.6%  direct: 1.1%  skip:79.8%  L0:49.8% L1:39.5% BI:10.8%
    
[libx264 @ 000000000411f120] 8x8 transform intra:29.9% inter:76.4%
    
[libx264 @ 000000000411f120] coded y,uvDC,uvAC intra: 31.1% 34.4% 18.7% inter: 10.2% 6.3% 3.0%
    
[libx264 @ 000000000411f120] i16 v,h,dc,p: 62% 34%  3%  0%
    
[libx264 @ 000000000411f120] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 23% 38%  4%  4%  3%  3%  2%  5%
    
[libx264 @ 000000000411f120] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 40% 35% 16%  1%  2%  2%  1%  1%  1%
    
[libx264 @ 000000000411f120] i8c dc,h,v,p: 52% 20% 24%  3%
    
[libx264 @ 000000000411f120] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 000000000411f120] ref P L0: 70.5% 10.1% 12.1%  7.3%
    
[libx264 @ 000000000411f120] ref B L0: 81.1% 16.9%  2.0%
    
[libx264 @ 000000000411f120] ref B L1: 89.7% 10.3%
    
[libx264 @ 000000000411f120] kb/s:3050.18

    Why am I not getting an I-Frame every second frame ? Is there something else I can set to do enforce this ? If not, can you suggest how to do this using the mpeg4 codec. It's vital that I can extract what type of frame has been encoded during the encoding process and that I can set a specific GOP structure.

  • avconv : Saving MP4 is Taking Hours

    4 septembre 2015, par PeregrineStudios

    not entirely sure if I should post this on askubuntu or stackoverflow. Posted on askubuntu and not getting any answers. I’m hoping I can find an answer here.

    I’m setting up a website where users can upload videos and share them. I’m using avconv to reduce the video size and save it twice, once as an mp4 and again as a webm.

    Uploading a .MOV from a phone, the video conversion is quick and manageable.

    Uploading a .mp4 from a Samsung Galaxy S3, the video conversion to webm is also quick. But, the conversion to another mp4 takes FOREVER - literally hours. Why ? Is anyone able to shed light on the problem ?

    My avconv output is below.

    avconv -i /var/www/dev_jackpine/ottawa2017/temp_videos/37a949071acaee714dae829ca8df9b29.mp4 -c:v libx264 -vf transpose=1,transpose=1,transpose=1 -s 640x480 /var/www/dev_jackpine/ottawa2017/spinnies/test.mp4
    
avconv version 0.8.17-4:0.8.17-0ubuntu0.12.04.1, Copyright (c) 2000-2014 the Libav developers
    
built on Mar 16 2015 13:26:50 with gcc 4.6.3
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/dev_jackpine/ottawa2017/temp_videos/37a949071acaee714dae829ca8df9b29.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 0
    
    compatible_brands: isom3gp4
    
    creation_time   : 2015-09-04 15:08:21
    
Duration: 00:00:07.76, start: 0.000000, bitrate: 11756 kb/s
    
Stream #0.0(eng): Video: h264 (Constrained Baseline), yuv420p, 1280x720, 11967 kb/s, 29.81 fps, 90k tbr, 90k tbn, 180k tbc
    
Metadata:
    
  creation_time   : 2015-09-04 15:08:21
    
Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 119 kb/s
    
Metadata:
    
  creation_time   : 2015-09-04 15:08:21
    
File '/var/www/dev_jackpine/ottawa2017/spinnies/test.mp4' already exists. Overwrite ? [y/N] y
    
[buffer @ 0xc3d580] w:1280 h:720 pixfmt:yuv420p
    
[scale @ 0xc3dac0] w:1280 h:720 fmt:yuv420p -> w:640 h:480 fmt:yuv420p flags:0x4
    
[transpose @ 0xc3e280] w:640 h:480 dir:1 -> w:480 h:640 rotation:clockwise vflip:0
    
[transpose @ 0xc3e7c0] w:480 h:640 dir:1 -> w:640 h:480 rotation:clockwise vflip:0
    
[transpose @ 0xc3ede0] w:640 h:480 dir:1 -> w:480 h:640 rotation:clockwise vflip:0
    
[libx264 @ 0xc2b100] MB rate (108000000) > level limit (983040)
    
[libx264 @ 0xc2b100] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX
    
[libx264 @ 0xc2b100] profile Main, level 5.1
    
[libx264 @ 0xc2b100] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.25 aq=1:1.00
    
Output #0, mp4, to '/var/www/dev_jackpine/ottawa2017/spinnies/test.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 0
    
    compatible_brands: isom3gp4
    
    creation_time   : 2015-09-04 15:08:21
    
    encoder         : Lavf53.21.1
    
    Stream #0.0(eng): Video: libx264, yuv420p, 480x640, q=-1--1, 180k tbn, 90k tbc
    
    Metadata:
    
      creation_time   : 2015-09-04 15:08:21
    
    Stream #0.1(eng): Audio: libvo_aacenc, 48000 Hz, stereo, s16, 200 kb/s
    
    Metadata:
    
      creation_time   : 2015-09-04 15:08:21
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 -> libx264)
    
  Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
    
Press ctrl-c to stop encoding

    Here’s an example frame output :

    frame=124398 fps=142 q=33.0 size=   16885kB time=1.38 bitrate=100110.2kbits/s dup=124356 drop=0

    I’ve had the process running the whole time I’ve been writing this question, and so far it’s done... 22 frames.

    What could be the problem ?

Navigation