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Autres articles (55)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • Support audio et vidéo HTML5

    10 avril 2011

    MediaSPIP utilise les balises HTML5 video et audio pour la lecture de documents multimedia en profitant des dernières innovations du W3C supportées par les navigateurs modernes.
    Pour les navigateurs plus anciens, le lecteur flash Flowplayer est utilisé.
    Le lecteur HTML5 utilisé a été spécifiquement créé pour MediaSPIP : il est complètement modifiable graphiquement pour correspondre à un thème choisi.
    Ces technologies permettent de distribuer vidéo et son à la fois sur des ordinateurs conventionnels (...)

  • MediaSPIP Core : La Configuration

    9 novembre 2010, par

    MediaSPIP Core fournit par défaut trois pages différentes de configuration (ces pages utilisent le plugin de configuration CFG pour fonctionner) : une page spécifique à la configuration générale du squelettes ; une page spécifique à la configuration de la page d’accueil du site ; une page spécifique à la configuration des secteurs ;
    Il fournit également une page supplémentaire qui n’apparait que lorsque certains plugins sont activés permettant de contrôler l’affichage et les fonctionnalités spécifiques (...)

Sur d’autres sites (9808)

  • ffmpeg for ios how to decode video and modify contrast

    16 juillet 2013, par Simone M

    i'm developing an application for iPad that uses rtsp protocol and decode a video from a remote server using FFmpeg library. I need to modify contrast of video, is possible using ffmpeg ?

    The second question is : how can i calculate buffer of the video ? What buffer ffmpeg is usign by default ?

    thanks=)

  • HTML5 Video Chrome - ffmpeg - mp4 working in all but Chrome

    16 octobre 2014, par IIIOXIII

    I have successfully encoded a file to .mp4 using ffmpeg which will play in all tested devices (Safari on PC, IE on PC, Android Browser, Andriod Video Player, and Safari iPad), except for Chrome.

    As a work-around, I had planned to simply list the .ogg source prior to the .mp4 source so that chrome would play the .ogg source without even seeing the .mp4 source, however, I ran into the issue mentioned here.

    Basically, I am after the proper ffmpeg command which will encode an .mp4 video to standards which will play in Chrome - of course without losing playback functionality on any of the other previously mentioned platforms.

    I have tried several combinations, such as :

    ffmpeg -i [filename].wmv -vprofile baseline -level 30 -vf scale=640:-1 -movflags faststart [filename].mp4

    etc. but have not yet found the winning one.

    EDIT : I tried :

    ffmpeg_new -i [filename].wmv -strict experimental –acodec libvo_aacenc -ac 2 -ab 160k -vcodec libx264 -vf scale=640:-1 -pix_fmt yuv420p -preset slow -profile:v baseline -level 30 -maxrate 10000000 -bufsize 10000000 -b 1200k -f mp4 -threads 0 [filename].mp4

    And here is the ffmpeg output :

    ffmpeg version N-54207-ge59fb3f Copyright (c) 2000-2013 the FFmpeg developers built on Jun 25 2013 21:55:00 with gcc 4.7.3 (GCC)
    
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
    
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
    
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
    
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
    
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
    
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
    
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
    
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
    
enable-libxvid --enable-zlib
    
  libavutil      52. 37.101 / 52. 37.101
    
  libavcodec     55. 17.100 / 55. 17.100
    
  libavformat    55. 10.100 / 55. 10.100
    
  libavdevice    55.  2.100 / 55.  2.100
    
  libavfilter     3. 77.101 /  3. 77.101
    
  libswscale      2.  3.100 /  2.  3.100
    
  libswresample   0. 17.102 /  0. 17.102
    
  libpostproc    52.  3.100 / 52.  3.100
    
[asf @ 000000000254f9e0] Stream #0: not enough frames to estimate rate; consider
    
 increasing probesize
    
Guessed Channel Layout for  Input Stream #0.0 : stereo
    
Input #0, asf, from 'C:\vidtests\Wildlife.wmv':
    
  Metadata:
    
    SfOriginalFPS   : 299700
    
    WMFSDKVersion   : 11.0.6001.7000
    
    WMFSDKNeeded    : 0.0.0.0000
    
    comment         : Footage: Small World Productions, Inc; Tourism New Zealand
    
 | Producer: Gary F. Spradling | Music: Steve Ball
    
    title           : Wildlife in HD
    
    copyright       : ┬⌐ 2008 Microsoft Corporation
    
    IsVBR           : 0
    
    DeviceConformanceTemplate: AP@L3
    
  Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
    
    Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp
    
, 192 kb/s
    
    Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x7
    
20, 5942 kb/s, 29.97 tbr, 1k tbn, 1k tbc
    
Please use -b:a or -b:v, -b is ambiguous
    
[libx264 @ 000000000264faa0] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
    

    
[libx264 @ 000000000264faa0] profile Constrained Baseline, level 3.0
    
[libx264 @ 000000000264faa0] 264 - core 133 r2334 a3ac64b - H.264/MPEG-4 AVC cod
    
ec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=0 r
    
ef=5 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=8 psy=1 psy_rd=1.00:0.00 mixed
    
_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pski
    
p=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 deci
    
mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyi
    
nt=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=abr mbtree=1
    
 bitrate=1200 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=10000
    
 vbv_bufsize=10000 nal_hrd=none ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'C:\vidtests\Wildlife_SE1.mp4':
    
  Metadata:
    
    SfOriginalFPS   : 299700
    
    WMFSDKVersion   : 11.0.6001.7000
    
    WMFSDKNeeded    : 0.0.0.0000
    
    comment         : Footage: Small World Productions, Inc; Tourism New Zealand
    
 | Producer: Gary F. Spradling | Music: Steve Ball
    
    title           : Wildlife in HD
    
    copyright       : ┬⌐ 2008 Microsoft Corporation
    
    IsVBR           : 0
    
    DeviceConformanceTemplate: AP@L3
    
    encoder         : Lavf55.10.100
    
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 6
    
40x360, q=-1--1, 1200 kb/s, 30k tbn, 29.97 tbc
    
    Stream #0:1(eng): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 44100
    
Hz, stereo, s16, 160 kb/s
    
Stream mapping:
    
  Stream #0:1 -> #0:0 (vc1 -> libx264)
    
  Stream #0:0 -> #0:1 (wmav2 -> libvo_aacenc)
    
Press [q] to stop, [?] for help
    
frame=   59 fps= 55 q=32.0 size=       0kB time=00:00:00.16 bitrate=   2.3kbits/
    
frame=   66 fps= 42 q=31.0 size=       0kB time=00:00:00.40 bitrate=   1.0kbits/
    
frame=   75 fps= 35 q=31.0 size=       0kB time=00:00:00.70 bitrate=   0.5kbits/
    
frame=   84 fps= 31 q=31.0 size=       0kB time=00:00:01.00 bitrate=   0.4kbits/
    
frame=   93 fps= 29 q=31.0 size=       0kB time=00:00:01.30 bitrate=   0.3kbits/
    
frame=  102 fps= 27 q=31.0 size=       0kB time=00:00:01.60 bitrate=   0.2kbits/
    
frame=  111 fps= 26 q=31.0 size=      38kB time=00:00:01.90 bitrate= 165.1kbits/
    
Queue input is backward in time
    
[mp4 @ 000000000264f2c0] Non-monotonous DTS in output stream 0:1; previous: 7616
    
, current: 7063; changing to 7617. This may result in incorrect timestamps in th
    
e output file.
    
frame=  120 fps= 25 q=31.0 size=     107kB time=00:00:02.20 bitrate= 397.7kbits/
    
frame=  128 fps= 24 q=31.0 size=     161kB time=00:00:02.46 bitrate= 534.1kbits/
    
frame=  137 fps= 23 q=31.0 size=     194kB time=00:00:02.76 bitrate= 572.6kbits/
    
frame=  145 fps= 23 q=31.0 size=     219kB time=00:00:03.03 bitrate= 592.1kbits/
    
frame=  153 fps= 22 q=31.0 size=     273kB time=00:00:03.30 bitrate= 677.8kbits/
    
frame=  162 fps= 22 q=31.0 size=     317kB time=00:00:03.60 bitrate= 720.8kbits/
    
frame=  170 fps= 21 q=31.0 size=     366kB time=00:00:03.87 bitrate= 775.2kbits/
    
frame=  177 fps= 21 q=31.0 size=     451kB time=00:00:04.10 bitrate= 900.2kbits/
    
frame=  193 fps= 21 q=31.0 size=     602kB time=00:00:04.63 bitrate=1062.7kbits/
    
frame=  208 fps= 22 q=30.0 size=     755kB time=00:00:05.13 bitrate=1204.2kbits/
    
frame=  219 fps= 22 q=30.0 size=     769kB time=00:00:05.50 bitrate=1143.6kbits/
    
frame=  228 fps= 21 q=30.0 size=     790kB time=00:00:05.80 bitrate=1114.5kbits/
    
frame=  234 fps= 21 q=31.0 size=     806kB time=00:00:06.00 bitrate=1098.7kbits/
    
frame=  243 fps= 21 q=31.0 size=     806kB time=00:00:06.30 bitrate=1046.4kbits/
    
frame=  251 fps= 21 q=31.0 size=     831kB time=00:00:06.57 bitrate=1035.6kbits/
    
frame=  260 fps= 20 q=31.0 size=     860kB time=00:00:06.87 bitrate=1024.6kbits/
    
frame=  273 fps= 21 q=31.0 size=     934kB time=00:00:07.30 bitrate=1046.7kbits/
    
frame=  288 fps= 21 q=30.0 size=    1019kB time=00:00:07.80 bitrate=1068.7kbits/
    
frame=  302 fps= 21 q=30.0 size=    1066kB time=00:00:08.27 bitrate=1055.8kbits/
    
frame=  314 fps= 21 q=29.0 size=    1146kB time=00:00:08.67 bitrate=1082.1kbits/
    
frame=  328 fps= 21 q=28.0 size=    1189kB time=00:00:09.14 bitrate=1065.6kbits/
    
frame=  341 fps= 21 q=28.0 size=    1247kB time=00:00:09.57 bitrate=1066.7kbits/
    
frame=  352 fps= 22 q=27.0 size=    1274kB time=00:00:09.94 bitrate=1049.3kbits/
    
frame=  365 fps= 22 q=27.0 size=    1298kB time=00:00:10.37 bitrate=1024.7kbits/
    
frame=  376 fps= 22 q=27.0 size=    1349kB time=00:00:10.74 bitrate=1028.7kbits/
    
frame=  388 fps= 22 q=26.0 size=    1378kB time=00:00:11.14 bitrate=1012.9kbits/
    
frame=  401 fps= 22 q=26.0 size=    1415kB time=00:00:11.57 bitrate=1001.4kbits/
    
frame=  412 fps= 22 q=26.0 size=    1454kB time=00:00:11.94 bitrate= 996.9kbits/
    
frame=  421 fps= 22 q=27.0 size=    1489kB time=00:00:12.24 bitrate= 996.2kbits/
    
frame=  431 fps= 21 q=27.0 size=    1509kB time=00:00:12.57 bitrate= 982.7kbits/
    
frame=  441 fps= 21 q=28.0 size=    1555kB time=00:00:12.91 bitrate= 986.6kbits/
    
frame=  450 fps= 21 q=28.0 size=    1599kB time=00:00:13.21 bitrate= 991.7kbits/
    
frame=  460 fps= 21 q=28.0 size=    1621kB time=00:00:13.54 bitrate= 980.4kbits/
    
frame=  470 fps= 21 q=28.0 size=    1660kB time=00:00:13.88 bitrate= 979.9kbits/
    
frame=  480 fps= 21 q=28.0 size=    1734kB time=00:00:14.21 bitrate= 999.2kbits/
    
frame=  489 fps= 21 q=29.0 size=    1834kB time=00:00:14.51 bitrate=1035.3kbits/
    
frame=  499 fps= 21 q=29.0 size=    1890kB time=00:00:14.84 bitrate=1042.8kbits/
    
frame=  508 fps= 21 q=29.0 size=    1962kB time=00:00:15.14 bitrate=1060.8kbits/
    
frame=  519 fps= 21 q=29.0 size=    2061kB time=00:00:15.51 bitrate=1087.9kbits/
    
frame=  531 fps= 21 q=29.0 size=    2189kB time=00:00:15.91 bitrate=1126.6kbits/
    
frame=  540 fps= 21 q=29.0 size=    2329kB time=00:00:16.21 bitrate=1176.4kbits/
    
frame=  551 fps= 21 q=29.0 size=    2439kB time=00:00:16.58 bitrate=1204.8kbits/
    
frame=  562 fps= 21 q=29.0 size=    2569kB time=00:00:16.95 bitrate=1241.8kbits/
    
frame=  575 fps= 21 q=29.0 size=    2688kB time=00:00:17.38 bitrate=1266.9kbits/
    
frame=  581 fps= 21 q=29.0 size=    2749kB time=00:00:17.58 bitrate=1280.6kbits/
    
frame=  589 fps= 21 q=29.0 size=    2785kB time=00:00:17.85 bitrate=1278.1kbits/
    
frame=  595 fps= 21 q=30.0 size=    2808kB time=00:00:18.05 bitrate=1274.5kbits/
    
frame=  602 fps= 20 q=30.0 size=    2903kB time=00:00:18.28 bitrate=1300.7kbits/
    
frame=  610 fps= 20 q=31.0 size=    3008kB time=00:00:18.55 bitrate=1328.2kbits/
    
frame=  616 fps= 20 q=31.0 size=    3128kB time=00:00:18.75 bitrate=1366.6kbits/
    
frame=  625 fps= 20 q=31.0 size=    3238kB time=00:00:19.05 bitrate=1392.5kbits/
    
frame=  633 fps= 20 q=31.0 size=    3320kB time=00:00:19.31 bitrate=1407.9kbits/
    
frame=  642 fps= 20 q=31.0 size=    3397kB time=00:00:19.61 bitrate=1418.4kbits/
    
frame=  652 fps= 20 q=31.0 size=    3437kB time=00:00:19.95 bitrate=1411.1kbits/
    
frame=  661 fps= 20 q=31.0 size=    3511kB time=00:00:20.25 bitrate=1420.3kbits/
    
frame=  669 fps= 20 q=31.0 size=    3578kB time=00:00:20.52 bitrate=1428.2kbits/
    
frame=  679 fps= 20 q=31.0 size=    3606kB time=00:00:20.85 bitrate=1416.6kbits/
    
frame=  691 fps= 20 q=32.0 size=    3670kB time=00:00:21.25 bitrate=1414.5kbits/
    
frame=  701 fps= 20 q=32.0 size=    3798kB time=00:00:21.58 bitrate=1441.2kbits/
    
frame=  713 fps= 20 q=32.0 size=    3901kB time=00:00:21.98 bitrate=1453.3kbits/
    
frame=  723 fps= 20 q=32.0 size=    3969kB time=00:00:22.32 bitrate=1456.6kbits/
    
frame=  735 fps= 20 q=32.0 size=    4027kB time=00:00:22.72 bitrate=1451.7kbits/
    
frame=  744 fps= 20 q=32.0 size=    4102kB time=00:00:23.02 bitrate=1459.6kbits/
    
frame=  755 fps= 20 q=32.0 size=    4135kB time=00:00:23.39 bitrate=1448.3kbits/
    
frame=  764 fps= 20 q=32.0 size=    4172kB time=00:00:23.69 bitrate=1442.7kbits/
    
frame=  776 fps= 20 q=32.0 size=    4216kB time=00:00:24.09 bitrate=1433.5kbits/
    
frame=  787 fps= 20 q=32.0 size=    4254kB time=00:00:24.45 bitrate=1424.8kbits/
    
frame=  802 fps= 20 q=32.0 size=    4337kB time=00:00:24.95 bitrate=1423.6kbits/
    
frame=  815 fps= 20 q=32.0 size=    4369kB time=00:00:25.39 bitrate=1409.6kbits/
    
frame=  828 fps= 20 q=32.0 size=    4450kB time=00:00:25.82 bitrate=1411.5kbits/
    
frame=  840 fps= 20 q=32.0 size=    4467kB time=00:00:26.22 bitrate=1395.3kbits/
    
frame=  852 fps= 20 q=32.0 size=    4550kB time=00:00:26.62 bitrate=1399.8kbits/
    
frame=  865 fps= 20 q=32.0 size=    4594kB time=00:00:27.06 bitrate=1390.7kbits/
    
frame=  877 fps= 20 q=32.0 size=    4629kB time=00:00:27.46 bitrate=1380.9kbits/
    
frame=  889 fps= 20 q=32.0 size=    4689kB time=00:00:27.86 bitrate=1378.6kbits/
    
frame=  900 fps= 20 q=32.0 size=    4740kB time=00:00:28.22 bitrate=1375.6kbits/
    
frame=  901 fps= 19 q=-1.0 Lsize=    5203kB time=00:00:30.10 bitrate=1416.0kbits
    
/s
    
video:4586kB audio:590kB subtitle:0 global headers:0kB muxing overhead 0.532558%
    

    
[libx264 @ 000000000264faa0] frame I:8     Avg QP:22.98  size: 31700
    
[libx264 @ 000000000264faa0] frame P:893   Avg QP:27.55  size:  4974
    
[libx264 @ 000000000264faa0] mb I  I16..4: 34.6%  0.0% 65.4%
    
[libx264 @ 000000000264faa0] mb P  I16..4:  0.8%  0.0%  1.5%  P16..4: 41.4% 18.8
    
%  8.5%  0.0%  0.0%    skip:29.0%
    
[libx264 @ 000000000264faa0] final ratefactor: 24.50
    
[libx264 @ 000000000264faa0] coded y,uvDC,uvAC intra: 64.3% 76.0% 36.7% inter: 2
    
3.5% 19.6% 0.7%
    
[libx264 @ 000000000264faa0] i16 v,h,dc,p: 34% 33% 11% 22%
    
[libx264 @ 000000000264faa0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 16% 12%  9% 12%
    
11% 12%  7%  8%
    
[libx264 @ 000000000264faa0] i8c dc,h,v,p: 55% 23% 14%  7%
    
[libx264 @ 000000000264faa0] ref P L0: 72.3% 12.0%  8.1%  3.7%  3.9%
    
[libx264 @ 000000000264faa0] kb/s:1249.53

    But still no luck. The .mp4 will play in every compatible device/browser combination I have tried except for chrome.. Any advice ?

    TIA.

  • Running a 2-pass video conversion using Python's subprocess module and ffmpeg

    22 novembre 2012, par ensnare

    I'm trying to convert a bunch of videos to play on my iPad. I'm using the subprocess module, which from what I understand launches a binary in a separate process from my script. I'm not sure how to handle 2-pass encoding which requires that the first process terminate before the second begin.

    Here is my code :

    def convert(filename):
    
  extension = filename[-3:]
    

    
  destination_filename_720 = filename[-4:] + '-a720p' + '.mp4'
    
  destination_filename_1080 = filename[-4:] + '-a1080p' + '.mp4'
    

    
  p = subprocess.Popen(['ffmpeg','-i', str(filename) ,
    
                        '-acodec' , 'aac' ,
    
                        '-ab' , '160k' ,
    
                        '-ac' , '2' ,
    
                        '-vcodec' , 'libx264' ,
    
                        '-strict' , '-2' ,
    
                        '-vpre' , 'ipod640' ,
    
                        '-threads' , '8' ,
    
                        '-s' , '1280x720' ,
    
                        '-b:v' , '2000k' ,
    
                        '-pass' , '1' ,
    
                        '-y' ,
    
                        destination_filename_720])
    

    
  p = subprocess.Popen(['ffmpeg','-i', str(filename) ,
    
                        '-acodec' , 'aac' ,
    
                        '-ab' , '160k' ,
    
                        '-ac' , '2' ,
    
                        '-vcodec' , 'libx264' ,
    
                        '-strict' , '-2' ,
    
                        '-vpre' , 'ipod640' ,
    
                        '-threads' , '8' ,
    
                        '-s' , '1280x720' ,
    
                        '-b:v' , '2000k' ,
    
                        '-pass' , '2' ,
    
                        '-y' ,
    
                        destination_filename_720])

    As soon as the convert() function is called, both processes are spawned immediately.

    The second process fails because the first process hasn't yet finished.

    How can I fix this ? Or, is there a better way ?

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