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  • Mise à disposition des fichiers

    14 avril 2011, par

    Par défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
    Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
    Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...)

  • Amélioration de la version de base

    13 septembre 2013

    Jolie sélection multiple
    Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
    Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)

  • Formulaire personnalisable

    21 juin 2013, par

    Cette page présente les champs disponibles dans le formulaire de publication d’un média et il indique les différents champs qu’on peut ajouter. Formulaire de création d’un Media
    Dans le cas d’un document de type média, les champs proposés par défaut sont : Texte Activer/Désactiver le forum ( on peut désactiver l’invite au commentaire pour chaque article ) Licence Ajout/suppression d’auteurs Tags
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire. (...)

Sur d’autres sites (4261)

  • Popen.write - operation on closed file | images to video using FFmpeg

    10 juin 2014, par f.rodrigues

    I’m trying to create a video file from images from my webcam(using SimpleCV), the images are converted to PIL format and then tostring() [rawformat]

    I’m using python subprocess and Popen to create the video using the FFmpeg.

    I can pipe the one image to the FFmpeg and make a video out of it
    But when I try to do a bunch of them I get a error :

    ValueError: I/O operation on closed file

    here’s my code.

    import subprocess as sp
    
from SimpleCV import *
    
from Image import Image
    

    
FFMPEG_BIN = "ffmpeg.exe"
    

    
img = Camera().getImage().toRGB()
    

    

    
command = [FFMPEG_BIN, '-y',  # (optional) overwrite output file if it exists
    
           '-f', 'rawvideo', '-vcodec', 'rawvideo', '-s', '%sx%s'%(img.width,img.height),  # size of one frame
    
           '-pix_fmt', 'rgb24', '-r', '24',  # frames per second
    
           '-i', '-',  # The imput comes from a pipe
    
           '-an',  # Tells FFMPEG not to expect any audio
    
           '-vcodec', 'libx264rgb',
    
           'my_output_videofile.mp4']
    

    

    
pipe = sp.Popen(command, stdin=sp.PIPE)#, stderr=sp.PIPE)
    

    

    
for n in xrange(10):
    
    img = Camera().getImage().toRGB().getPIL().tostring()
    
    pipe.stdin.write(img)
    

    

    
pipe.terminate()

    It’s wierd because the pipe.terminate() is in the end of the code, and it should close the file right away.

    EDIT :
    Removed the stderr

      ffmpeg version N-63208-gbe1fbc0 Copyright (c) 2000-2014 the FFmpeg developers
    
  built on May 17 2014 01:30:26 with gcc 4.8.2 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib 
    
  --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray 
    
  --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug 
    
  --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus 
    
  --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame 
    
  --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx 
    
  --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid 
    
  --enable-decklink --enable-zlib
    
  libavutil      52. 83.100 / 52. 83.100
    
  libavcodec     55. 62.100 / 55. 62.100
    
  libavformat    55. 38.100 / 55. 38.100
    
  libavdevice    55. 13.101 / 55. 13.101
    
  libavfilter     4.  5.100 /  4.  5.100
    
  libswscale      2.  6.100 /  2.  6.100
    
  libswresample   0. 19.100 /  0. 19.100
    
  libpostproc    52.  3.100 / 52.  3.100
    
Input #0, rawvideo, from 'pipe:':
    
  Duration: N/A, start: 0.000000, bitrate: 44236 kb/s
    
    Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240, 44236 kb/s, 24 tbr, 24 tbn, 24 tbc
    
No pixel format specified, rgb24 for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264rgb @ 0000000000359de0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
    
[libx264rgb @ 0000000000359de0] profile High 4:4:4 Predictive, level 1.3, 4:4:4 8-bit
    
[libx264rgb @ 0000000000359de0] 264 - core 142 r2431 ac76440 - 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=24 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=1.40 aq=1:1.00
    
Output #0, mp4, to 'my_output_videofile.mp4':
    
  Metadata:
    
    encoder         : Lavf55.38.100
    
    Stream #0:0: Video: h264 (libx264rgb) ([33][0][0][0] / 0x0021), rgb24, 320x240, q=-1--1, 12288 tbn, 24 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo -> libx264rgb)
    
frame=    7 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A

  • FFPLAY produces black video output [closed]

    28 janvier 2020, par RooterTooter

    I’m having an issue playing videos with ffplay on an embedded arm device (imx6). The OS is based on yocto sumo and uses the meta-freescale layers for imx6.

    I have a number of test videos in different formats that I am sure are formatted correctly (They play fine on my laptop with ffplay). FFMPEG has all the necessary codecs, detects my streams, it plays audio without an issue, but the video is just black.

    It’s worth nothing that I’m running X11 and have xterm running, and when ffplay is trying to play, a black box will pop up on the screen in the correct dimensions like it thinks it’s decoding video, but it’s always blank.

    $DISPLAY=:0 ffplay test.mp4
    
ffplay version 3.3.3 Copyright (c) 2003-2017 the FFmpeg developers
    
  built with gcc 7.3.0 (GCC)
    
  configuration: --disable-stripping --enable-pic --enable-shared --enable-pthreads --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-libxcb-shape --enable-nonfree --cross-prefix=arm-poky-linux-gnueabi- --ld='arm-poky-linux-gnueabi-gcc -march=armv7-a -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a9 --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot' --cc='arm-poky-linux-gnueabi-gcc -march=armv7-a -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a9 --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot' --cxx='arm-poky-linux-gnueabi-g++ -march=armv7-a -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a9 --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot' --arch=arm --target-os=linux --enable-cross-compile --extra-cflags=' -O2 -pipe -g -feliminate-unused-debug-types -fdebug-prefix-map=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0=/usr/src/debug/ffmpeg/3.3.3-r0 -fdebug-prefix-map=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot-native= -fdebug-prefix-map=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot= -march=armv7-a -mfpu=neon -mfloat-abi=hard -mcpu=cortex-a9 --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot' --extra-ldflags='-Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed' --sysroot=/home/builder/imx-yocto-bsp/machine/tmp/work/cortexa9hf-neon-poky-linux-gnueabi/ffmpeg/3.3.3-r0/recipe-sysroot --enable-hardcoded-tables --libdir=/usr/lib --shlibdir=/usr/lib --datadir=/usr/share/ffmpeg --disable-mipsdsp --disable-mipsdspr2 --cpu=cortex-a9 --pkg-config=pkg-config --enable-avcodec --enable-avdevice --enable-avfilter --enable-avformat --enable-avresample --enable-bzlib --enable-gpl --disable-libgsm --disable-indev=jack --disable-libvorbis --enable-lzma --disable-libmp3lame --enable-openssl --enable-postproc --disable-libschroedinger --enable-sdl2 --disable-libspeex --enable-swresample --enable-swscale --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvpx --enable-libx264 --enable-outdev=xv
    
  libavutil      55. 58.100 / 55. 58.100
    
  libavcodec     57. 89.100 / 57. 89.100
    
  libavformat    57. 71.100 / 57. 71.100
    
  libavdevice    57.  6.100 / 57.  6.100
    
  libavfilter     6. 82.100 /  6. 82.100
    
  libavresample   3.  5.  0 /  3.  5.  0
    
  libswscale      4.  6.100 /  4.  6.100
    
  libswresample   2.  7.100 /  2.  7.100
    
  libpostproc    54.  5.100 / 54.  5.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':q=    0B f=0/0   
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.20.100
    
  Duration: 00:00:30.88, start: 0.000000, bitrate: 143 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 320x180, 67 kb/s, 21.08 fps, 21.08 tbr, 16192 tbn, 42.17 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 66 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler

    I’ve tried h264 and mp2 video with the same results. Has anyone seen this before

  • Speed up start of a stream recording with ffmpeg

    12 mai 2021, par neutron

    I try to record a video stream (from the web or a local webcam stream) and save it to a .mp4 / .flv file. I use FFmpeg with the version"N-59696-gc0a33c4".

    



    The problem isn't the recording of the stream, it is, how log it tooks to start the recording.

    



    This are the parameters i used to capture the stream (the stream is some random stream I found on the web) :

    



    ffmpeg.exe -i mmsh://live.camstreams.com/cscamscape?MSWMExt=.asf -r 25 -t 60 C:\temp\video.mp4


    



    And leads to this output :

    



    ffmpeg.exe -i mmsh://live.camstreams.com/cscams
cape?MSWMExt=.asf -r 25 -t 60 C:\temp\video.mp4
ffmpeg version N-59696-gc0a33c4 Copyright (c) 2000-2014 the FFmpeg developers
  built on Jan  8 2014 22:01:50 with gcc 4.8.2 (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-libvidstab --enable-libvo-aa
cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp
ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      52. 62.100 / 52. 62.100
  libavcodec     55. 47.100 / 55. 47.100
  libavformat    55. 22.102 / 55. 22.102
  libavdevice    55.  5.102 / 55.  5.102
  libavfilter     4.  0.103 /  4.  0.103
  libswscale      2.  5.101 /  2.  5.101
  libswresample   0. 17.104 /  0. 17.104
  libpostproc    52.  3.100 / 52.  3.100
[wmv3 @ 0275db40] Extra data: 8 bits left, value: 0
Input #0, asf, from 'mmsh://live.camstreams.com/cscamscape?MSWMExt=.asf':
  Metadata:
    title           : Live Fish Cam
    WMFSDKNeeded    : 0.0.0.0000
    DeviceConformanceTemplate: SP
    WMFSDKVersion   : 11.0.5721.5275
    IsVBR           : 0
  Duration: N/A, start: 3887858.274000, bitrate: 512 kb/s
    Stream #0:0(eng): Video: wmv3 (Simple) (WMV3 / 0x33564D57), yuv420p, 640x360
, 512 kb/s, 62.50 tbr, 1k tbn, 1k tbc
[libx264 @ 0275e400] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
[libx264 @ 0275e400] profile High, level 3.0
[libx264 @ 0275e400] 264 - core 140 r2377 1ca7bb9 - H.264/MPEG-4 AVC codec - Cop
yleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deb
lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 m
e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chro
ma_qp_offset=-2 threads=12 lookahead_threads=2 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 scene
cut=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=1.40 aq=1:1.00
[wmv3 @ 0275db40] Extra data: 8 bits left, value: 0
Output #0, mp4, to 'C:\temp\video.mp4':
  Metadata:
    title           : Live Fish Cam
    WMFSDKNeeded    : 0.0.0.0000
    DeviceConformanceTemplate: SP
    WMFSDKVersion   : 11.0.5721.5275
    IsVBR           : 0
    encoder         : Lavf55.22.102
    Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 6
40x360, q=-1--1, 12800 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (wmv3 -> libx264)
Press [q] to stop, [?] for help
frame=  148 fps=0.0 q=28.0 size=     228kB time=00:00:03.60 bitrate= 518.3kbits/
frame=  151 fps=117 q=28.0 size=     236kB time=00:00:03.72 bitrate= 519.2kbits/
frame=  178 fps= 91 q=28.0 size=     298kB time=00:00:04.80 bitrate= 508.3kbits/
frame=  204 fps= 64 q=28.0 size=     347kB time=00:00:05.84 bitrate= 487.4kbits/
... 
... And so on ...


    



    The problem now is, that it takes around 6-10 seconds until the recording starts after I entered the command.

    



    Is there a way to speed up this process ?

    


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