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Autres articles (30)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP 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" (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (7183)

  • avcodec/vvc_mvs : remove an unnecessary AV_ZERO64() call

    24 janvier 2024, par James Almer
    avcodec/vvc_mvs : remove an unnecessary AV_ZERO64() call

    Should fix "member access within misaligned address 0xf00 for type 'const union
    
av_alias64', which requires 8 byte alignment" errors as reported by GCC ubsan.
    

    Signed-off-by : James Almer <jamrial@gmail.com>
    • [DH] libavcodec/vvc/vvc_mvs.c

  • Converting series of images with ffmpeg results in black video [migrated]

    27 avril 2013, par Marco Gagliardi

    I've just downloaded ffmpeg since it seems to perfectly match my needs (make a video from a set of pictures). I'm currently playing around with some examples just to get started and there's something weird happening that I can't explain.
    I'm trying this command (provided in the official documentation) :

    ffmpeg -f image2 -pattern_type glob -i &#39;foo-*.jpeg&#39; -r 12 -s WxH foo.avi

    on a data set of 10 jpg pictures (of course I changed the pattern with '*.jpg'). The video seems to be encoded correctly but it's simply too fast to be sure about that (anyway it stops on the last frame that corresponds to the last picture). In order to get a longer video i thought to low the frame rate from 12 to 1 (one sec each picture) or 0.5 (2 sec each one) and so on.. no way ! with low rate values even if the video is played the pictures are simply not displayed. The player (VLC in my case) just shows a blank/empty video for a few seconds.

    Am I making something wrong or have I misunderstood the -r parameter ? Is it something related to codecs involved ? Finally.. How can i get each picture displayed for 1 or 2 seconds ?

    Here's the output :

    MacBook-Pro$ ffmpeg -f image2 -pattern_type glob -i &#39;*.jpg&#39; -r 1 -s 200x300 foo.avi
    
ffmpeg version N-52517-g1e4f75d Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Apr 27 2013 19:41:11 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
    
  configuration: --disable-yasm
    
  libavutil      52. 27.101 / 52. 27.101
    
  libavcodec     55.  6.100 / 55.  6.100
    
  libavformat    55.  3.100 / 55.  3.100
    
  libavdevice    55.  0.100 / 55.  0.100
    
  libavfilter     3. 61.100 /  3. 61.100
    
  libswscale      2.  2.100 /  2.  2.100
    
  libswresample   0. 17.102 /  0. 17.102
    
Input #0, image2, from &#39;*.jpg&#39;:
    
  Duration: 00:00:00.40, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: mjpeg, yuvj422p, 2560x1920 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 25 tbn, 25 tbc
    
File &#39;foo.avi&#39; already exists. Overwrite ? [y/N] y
    
Output #0, avi, to &#39;foo.avi&#39;:
    
  Metadata:
    
    ISFT            : Lavf55.3.100
    
    Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 200x300 [SAR 2:1 DAR 4:3], q=2-31, 200 kb/s, 1 tbn, 1 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mjpeg -> mpeg4)
    
Press [q] to stop, [?] for help
    
frame=    2 fps=0.0 q=2.0 Lsize=      43kB time=00:00:02.00 bitrate= 177.1kbits/s dup=0 drop=8    
    
video:38kB audio:0kB subtitle:0 global headers:0kB muxing overhead 15.099197%
    
MacBook-Pro$

  • cap.isOpened() : returns false in CentOS for Python 3 and OpenCV 3.1.0

    29 octobre 2017, par Mona Jalal

    So cap from opencv 3 doesn’t work in CentOS. I had no problem in OSX or Windows 7 which I tried initially.
    Here is the example code :

    import cv2
    
cap = cv2.VideoCapture('/home/grad3/jalal/PycharmProjects/hw4_cs58‌​5/Concession_LAN_8‌​‌​00‌​k.mp4',cv2.CAP_FFMPEG)
    

    
if not cap.isOpened():
    
    print('not opened')
    

    
while True:
    
    ret,frame = cap.read()
    

    
    if ret == False:
    
        print('frame empty')
    
        break
    
    cv2.imshow('frame', frame)
    
    if cv2.waitKey(1) == ord('q'):
    
        break

    And I get :

    /usr/local/anaconda3/bin/python /home/grad3/jalal/PycharmProjects/hw4_cs585/test.py
    
not opened
    
frame empty
    

    
Process finished with exit code 0

    I can open the video using ffplay vid_name and also here is the result of https://pastebin.com/YGk2DDCi here https://pastebin.com/HSyHSsEZ (ffmpeg codecs). How should I fix this ?

    I have opencv 3.1.0 and here’s some sys info.

    $ uname -a
    
Linux goku.bu.edu 3.10.0-693.5.2.el7.x86_64 #1 SMP Fri Oct 20 20:32:50 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

    and

    $ lsb_release -a
    
LSB Version:    :core-4.1-amd64:core-4.1-noarch
    
Distributor ID: CentOS
    
Description:    CentOS Linux release 7.4.1708 (Core) 
    
Release:    7.4.1708
    
Codename:   Core
    

    
cv2. getBuildInformation()
    
General configuration for OpenCV 3.1.0 =====================================
    
  Version control:               unknown
    

    
  Platform:
    
    Host:                        Linux 4.8.0-46-generic x86_64
    
    CMake:                       3.6.3
    
    CMake generator:             Unix Makefiles
    
    CMake build tool:            /usr/bin/gmake
    
    Configuration:               Release
    

    
  C/C++:
    
    Built as dynamic libs?:      YES
    
    C++ Compiler:                /opt/rh/devtoolset-2/root/usr/bin/c++  (ver 4.8.2)
    
    C++ flags (Release):         -I/cs/software/anaconda3/include    -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -fopenmp -O3 -DNDEBUG  -DNDEBUG
    
    C++ flags (Debug):           -I/cs/software/anaconda3/include    -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wno-narrowing -Wno-delete-non-virtual-dtor -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fvisibility-inlines-hidden -fopenmp -g  -O0 -DDEBUG -D_DEBUG
    
    C Compiler:                  /opt/rh/devtoolset-2/root/usr/bin/cc
    
    C flags (Release):           -I/cs/software/anaconda3/include    -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fopenmp -O3 -DNDEBUG  -DNDEBUG
    
    C flags (Debug):             -I/cs/software/anaconda3/include    -fsigned-char -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wno-narrowing -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -msse -msse2 -mno-avx -msse3 -mno-ssse3 -mno-sse4.1 -mno-sse4.2 -ffunction-sections -fvisibility=hidden -fopenmp -g  -O0 -DDEBUG -D_DEBUG
    
    Linker flags (Release):
    
    Linker flags (Debug):
    
    Precompiled headers:         YES
    
    Extra dependencies:          /cs/software/anaconda3/lib/libjpeg.so /cs/software/anaconda3/lib/libpng.so /cs/software/anaconda3/lib/libtiff.so /cs/software/anaconda3/lib/libhdf5.so /usr/lib64/librt.so /usr/lib64/libpthread.so /cs/software/anaconda3/lib/libz.so /usr/lib64/libdl.so /usr/lib64/libm.so dl m pthread rt
    
    3rdparty dependencies:       libwebp libjasper IlmImf libprotobuf
    

    
  OpenCV modules:
    
    To be built:                 core flann hdf imgproc ml photo reg surface_matching video dnn fuzzy imgcodecs shape videoio highgui objdetect plot superres xobjdetect xphoto bgsegm bioinspired dpm face features2d line_descriptor saliency text calib3d ccalib datasets rgbd stereo structured_light tracking videostab xfeatures2d ximgproc aruco optflow stitching python3
    
    Disabled:                    world contrib_world
    
    Disabled by dependency:      -
    
    Unavailable:                 cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev java python2 ts viz cvv matlab sfm
    

    
  GUI: 
    
    QT:                          NO
    
    GTK+:                        NO
    
    GThread :                    NO
    
    GtkGlExt:                    NO
    
    OpenGL support:              NO
    
    VTK support:                 NO
    

    
  Media I/O: 
    
    ZLib:                        /cs/software/anaconda3/lib/libz.so (ver 1.2.8)
    
    JPEG:                        /cs/software/anaconda3/lib/libjpeg.so (ver 80)
    
    WEBP:                        build (ver 0.3.1)
    
    PNG:                         /cs/software/anaconda3/lib/libpng.so (ver 1.6.27)
    
    TIFF:                        /cs/software/anaconda3/lib/libtiff.so (ver 42 - 4.0.6)
    
    JPEG 2000:                   build (ver 1.900.1)
    
    OpenEXR:                     build (ver 1.7.1)
    
    GDAL:                        NO
    

    
  Video I/O:
    
    DC1394 1.x:                  NO
    
    DC1394 2.x:                  NO
    
    FFMPEG:                      NO
    
      codec:                     NO
    
      format:                    NO
    
      util:                      NO
    
      swscale:                   NO
    
      resample:                  NO
    
      gentoo-style:              NO
    
    GStreamer:                   NO
    
    OpenNI:                      NO
    
    OpenNI PrimeSensor Modules:  NO
    
    OpenNI2:                     NO
    
    PvAPI:                       NO
    
    GigEVisionSDK:               NO
    
    UniCap:                      NO
    
    UniCap ucil:                 NO
    
    V4L/V4L2:                    YES/YES
    
    XIMEA:                       NO
    
    Xine:                        NO
    
    gPhoto2:                     NO
    

    
  Parallel framework:            OpenMP
    

    
  Other third-party libraries:
    
    Use IPP:                     9.0.1 [9.0.1]
    
         at:                     /opt/conda/conda-bld/opencv_1491943704081/work/opencv-3.1.0/3rdparty/ippicv/unpack/ippicv_lnx
    
    Use IPP Async:               NO
    
    Use VA:                      NO
    
    Use Intel VA-API/OpenCL:     NO
    
    Use Eigen:                   YES (ver 3.2.8)
    
    Use Cuda:                    NO
    
    Use OpenCL:                  NO
    
    Use custom HAL:              NO
    

    
  Python 2:
    
    Interpreter:                 (ver 3.5.3)
    

    
  Python 3:
    
    Interpreter:                 /cs/software/anaconda3/bin/python (ver 3.5.3)
    
    Libraries:                   /cs/software/anaconda3/lib/libpython3.5m.so (ver 3.5.3)
    
    numpy:                       /cs/software/anaconda3/lib/python3.5/site-packages/numpy/core/include (ver 1.12.1)
    
    packages path:               /cs/software/anaconda3/lib/python3.5/site-packages
    

    
  Python (for build):            
    

    
  Java:
    
    ant:                         NO
    
    JNI:                         NO
    
    Java wrappers:               NO
    
    Java tests:                  NO
    

    
  Matlab:                        NO
    

    
  Tests and samples:
    
    Tests:                       NO
    
    Performance tests:           NO
    
    C/C++ Examples:              NO
    

    
  Install path:                  /cs/software/anaconda3
    

    
  cvconfig.h is in:              /opt/conda/conda-bld/opencv_1491943704081/work/opencv-3.1.0/build
    
-----------------------------------------------------------------

    UPDATE : tried .avi and .flv formats and the same problem !

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