Recherche avancée

Sur d’autres sites (4114)

• Issue installing OpenCV 3.0.0 on Ubuntu 14.04

  26 septembre 2015, par marcman

  I’ve been trying to install OpenCV on a Linux machine running Ubuntu 14.04. I’ve installed all of the dependencies that I have come across in tutorials as well as those listed on the OpenCV site. However, I’m pretty new to Linux and the Linux file system, so I wouldn’t be terribly surprised if these issues are related to the installation location or something.

  It appears that I am getting an issue with FFMPEG stuff, but I definitely have it installed

  dpkg -s libgtk2.0-0 | grep '^Version'

  returns

  Version: 2.24.23-0ubuntu1.3

  I’m not quite sure what the issue is here. Below is the error printout. Most of the lines are pretty much identical (I’m assuming the same issue is causing each of these errors). Although I posted the whole thing below for completeness, you can probably get at the issue from one or two of the errors as well as the last line. For brevity’s sake, here are a sample of the errors :

  ...
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:738:67: error: 'PIX_FMT_RGB24' was not declared in this scope
  
       avpicture_fill((AVPicture*)&rgb_picture, rgb_picture.data[0], PIX_FMT_RGB24,
  
                                                                     ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:756:17: error: 'PIX_FMT_BGR24' was not declared in this scope
  
                   PIX_FMT_BGR24,
  
                   ^
  
  ...
  
  [ 35%] Built target opencv_photo
  
  make: *** [all] Error 2
  
  $

  The commands immediately preceding the errors were

  $ cmake -DWITH_QT=ON -DWITH_OPENGL=ON -DFORCE_VTK=ON -DWITH_TBB=ON -DWITH_GDAL=ON -DWITH_XINE=ON -DBUILD_EXAMPLES=ON ..
  
  $ make -j4

  as taken from the tutorial I linked to above.

  Entire error printout :

  In file included from /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg.cpp:45:0:
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In member function 'void CvCapture_FFMPEG::close()':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:317:36: error: 'avcodec_free_frame' was not declared in this scope
  
           avcodec_free_frame(&picture);
  
                                      ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In member function 'bool CvCapture_FFMPEG::open(const char*)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:632:43: error: 'avcodec_alloc_frame' was not declared in this scope
  
               picture = avcodec_alloc_frame();
  
                                             ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:635:41: error: 'PIX_FMT_BGR24' was not declared in this scope
  
                       avpicture_get_size( PIX_FMT_BGR24,
  
                                           ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In member function 'bool CvCapture_FFMPEG::retrieveFrame(int, unsigned char**, int*, int*, int*, int*)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:738:67: error: 'PIX_FMT_RGB24' was not declared in this scope
  
       avpicture_fill((AVPicture*)&rgb_picture, rgb_picture.data[0], PIX_FMT_RGB24,
  
                                                                     ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:756:17: error: 'PIX_FMT_BGR24' was not declared in this scope
  
                   PIX_FMT_BGR24,
  
                   ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In function 'AVFrame* icv_alloc_picture_FFMPEG(int, int, int, bool)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1110:35: error: 'avcodec_alloc_frame' was not declared in this scope
  
       picture = avcodec_alloc_frame();
  
                                     ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1113:33: error: 'PixelFormat' was not declared in this scope
  
       size = avpicture_get_size( (PixelFormat) pix_fmt, width, height);
  
                                   ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1122:38: error: expected ')' before 'pix_fmt'
  
                          (PixelFormat) pix_fmt, width, height);
  
                                        ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: At global scope:
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1104:18: warning: unused parameter 'pix_fmt' [-Wunused-parameter]
  
   static AVFrame * icv_alloc_picture_FFMPEG(int pix_fmt, int width, int height, bool alloc)
  
                    ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In function 'AVStream* icv_add_video_stream_FFMPEG(AVFormatContext*, AVCodecID, int, int, int, double, int)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1230:19: error: 'PixelFormat' was not declared in this scope
  
       c->pix_fmt = (PixelFormat) pixel_format;
  
                     ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1230:32: error: expected ';' before 'pixel_format'
  
       c->pix_fmt = (PixelFormat) pixel_format;
  
                                  ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: At global scope:
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1130:18: warning: unused parameter 'pixel_format' [-Wunused-parameter]
  
   static AVStream *icv_add_video_stream_FFMPEG(AVFormatContext *oc,
  
                    ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In member function 'bool CvVideoWriter_FFMPEG::writeFrame(const unsigned char*, int, int, int, int, int)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1405:26: error: 'PIX_FMT_BGR24' was not declared in this scope
  
       if (input_pix_fmt == PIX_FMT_BGR24) {
  
                            ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1410:31: error: 'PIX_FMT_GRAY8' was not declared in this scope
  
       else if (input_pix_fmt == PIX_FMT_GRAY8) {
  
                                 ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1423:25: error: 'PixelFormat' was not declared in this scope
  
                          (PixelFormat)input_pix_fmt, width, height);
  
                           ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1429:59: error: expected ')' before 'input_pix_fmt'
  
                                                (PixelFormat)input_pix_fmt,
  
                                                             ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1447:25: error: 'PixelFormat' was not declared in this scope
  
                          (PixelFormat)input_pix_fmt, width, height);
  
                           ^
  
  In file included from /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg.cpp:45:0:
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In member function 'bool CvVideoWriter_FFMPEG::open(const char*, int, double, int, int, bool)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1604:25: error: 'PIX_FMT_BGR24' was not declared in this scope
  
           input_pix_fmt = PIX_FMT_BGR24;
  
                           ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1607:25: error: 'PIX_FMT_GRAY8' was not declared in this scope
  
           input_pix_fmt = PIX_FMT_GRAY8;
  
                           ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1683:25: error: 'PIX_FMT_YUV422P' was not declared in this scope
  
           codec_pix_fmt = PIX_FMT_YUV422P;
  
                           ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1687:25: error: 'PIX_FMT_YUVJ420P' was not declared in this scope
  
           codec_pix_fmt = PIX_FMT_YUVJ420P;
  
                           ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1691:42: error: 'PIX_FMT_GRAY8' was not declared in this scope
  
           codec_pix_fmt = input_pix_fmt == PIX_FMT_GRAY8 ||
  
                                            ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1692:42: error: 'PIX_FMT_GRAY16LE' was not declared in this scope
  
                           input_pix_fmt == PIX_FMT_GRAY16LE ||
  
                                            ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1693:42: error: 'PIX_FMT_GRAY16BE' was not declared in this scope
  
                           input_pix_fmt == PIX_FMT_GRAY16BE ? input_pix_fmt : PIX_FMT_YUV420P;
  
                                            ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1693:77: error: 'PIX_FMT_YUV420P' was not declared in this scope
  
                           input_pix_fmt == PIX_FMT_GRAY16BE ? input_pix_fmt : PIX_FMT_YUV420P;
  
                                                                               ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: At global scope:
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1922:119: error: 'PixelFormat' has not been declared
  
       static AVStream* addVideoStream(AVFormatContext *oc, CV_CODEC_ID codec_id, int w, int h, int bitrate, double fps, PixelFormat pixel_format);
  
                                                                                                                         ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:1969:134: error: 'PixelFormat' has not been declared
  
   AVStream* OutputMediaStream_FFMPEG::addVideoStream(AVFormatContext *oc, CV_CODEC_ID codec_id, int w, int h, int bitrate, double fps, PixelFormat pixel_format)
  
                                                                                                                                        ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In static member function 'static AVStream* OutputMediaStream_FFMPEG::addVideoStream(AVFormatContext*, AVCodecID, int, int, int, double, int)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2047:16: error: invalid conversion from 'int' to 'AVPixelFormat' [-fpermissive]
  
       c->pix_fmt = pixel_format;
  
                  ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In member function 'bool OutputMediaStream_FFMPEG::open(const char*, int, int, double)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2107:5: error: 'PixelFormat' was not declared in this scope
  
       PixelFormat codec_pix_fmt = PIX_FMT_YUV420P;
  
       ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2107:17: error: expected ';' before 'codec_pix_fmt'
  
       PixelFormat codec_pix_fmt = PIX_FMT_YUV420P;
  
                   ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2111:99: error: 'codec_pix_fmt' was not declared in this scope
  
       video_st_ = addVideoStream(oc_, codec_id, width, height, width * height * bitrate_scale, fps, codec_pix_fmt);
  
                                                                                                     ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp: In member function 'bool InputMediaStream_FFMPEG::open(const char*, int*, int*, int*, int*)':
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2316:18: error: 'PIX_FMT_YUV420P' was not declared in this scope
  
               case PIX_FMT_YUV420P:
  
                    ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2320:18: error: 'PIX_FMT_YUV422P' was not declared in this scope
  
               case PIX_FMT_YUV422P:
  
                    ^
  
  /usr/opencv-3.0.0/modules/videoio/src/cap_ffmpeg_impl.hpp:2324:18: error: 'PIX_FMT_YUV444P' was not declared in this scope
  
               case PIX_FMT_YUV444P:
  
                    ^
  
  make[2]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_ffmpeg.cpp.o] Error 1
  
  make[2]: *** Waiting for unfinished jobs....
  
  [ 35%] Building CXX object modules/photo/CMakeFiles/opencv_photo.dir/src/align.cpp.o
  
  make[1]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/all] Error 2
  
  make[1]: *** Waiting for unfinished jobs....
  
  [ 35%] Building CXX object modules/photo/CMakeFiles/opencv_photo.dir/src/seamless_cloning_impl.cpp.o
  
  [ 35%] Building CXX object modules/photo/CMakeFiles/opencv_photo.dir/src/hdr_common.cpp.o
  
  [ 35%] Building CXX object modules/photo/CMakeFiles/opencv_photo.dir/opencl_kernels_photo.cpp.o
  
  Linking CXX shared library ../../lib/libopencv_photo.so
  
  [ 35%] Built target opencv_photo
  
  make: *** [all] Error 2

  Any insight is greatly appreciated !

• Android Camera Video frames decoding coming out distorted with horizontal lines

  13 novembre 2018, par Iain Stanford

  I’ve been porting over the following Test Android example to run in a simple Xamarin Android project.

  https://bigflake.com/mediacodec/ExtractMpegFramesTest_egl14.java.txt

  I’m running a video captured by the camera (on the same device) through this pipeline but the PNGs I’m getting out the other end are distorted, I assume due to the minefield of Android Camera color spaces.

  Here are the images I’m getting running a Camera Video through the pipeline...

  https://imgur.com/a/nrOVBPk

  Its hard to tell, but it ’kinda’ looks like it is a single line of the actual image, stretched across. But I honestly wouldn’t want to bank on that being the issue as it could be a red herring.

  However, when I run a ’normal’ video that I grabbed online through the same pipeline, it works completely fine.

  I used the first video found on here (the lego one) http://techslides.com/sample-webm-ogg-and-mp4-video-files-for-html5

  And I get frames like this...

  https://imgur.com/a/yV2vMMd

  Checking out some of the ffmpeg probe data of the video, both this and my camera video have the same pixel format (pix_fmt=yuv420p) but there are differences in color_range.

  The video that works has,

  color_range=tv
  
  color_space=bt709
  
  color_transfer=bt709
  
  color_primaries=bt709

  And the camera video just has...

  color_range=unknown
  
  color_space=unknown
  
  color_transfer=unknown
  
  color_primaries=unknown

  The media format of the camera video appears to be in SemiPlanar YUV, the codec output gets updated to that at least. I get an OutputBuffersChanged message which sets the output buffer of the MediaCodec to the following,

  {
  
      mime=video/raw,
  
      crop-top=0, 
  
      crop-right=639, 
  
      slice-height=480,
  
      color-format=21,
  
      height=480, 
  
      width=640, 
  
      what=1869968451, 
  
      crop-bottom=479, 
  
      crop-left=0, 
  
      stride=640
  
  }

  I can also point the codec output to a TextureView as opposed to OpenGL surface, and just grab the Bitmap that way (obviously slower) and these frames look fine. So maybe its the OpenGL display of the raw codec output ? Does Android TextureView do its on decoding ?

  Note - The reason I’m looking into all this is I have a need to try and run some form of image processing on a raw camera feed at as close to 30fps as possible. Obviously, this is not possible some devices, but recording a video at 30fps and then processing the video after the fact is a possible workaround I’m investigating. I’d rather try and process the image in OpenGL for the improved speed than taking each frame as a Bitmap from the TextureView output.

  In researching this I’ve seen someone else with pretty much the exact same issue here How to properly save frames from mp4 as png files using ExtractMpegFrames.java ?
  although he didn’t seem to have much luck finding out what might be going wrong.

  EDIT - FFMpeg Probe outputs for both videos...

  Video that works - https://justpaste.it/484ec .
  Video that fails - https://justpaste.it/55in0 .

• Announcement : Piwik to focus on Reliability, Performance and Security

  7 octobre 2014, par Matthieu Aubry — About, Community

  To our valued team and community,

  Well, we have moved fast and achieved so much during the past few months. Relentlessly releasing major version after major version… We got a lot done including several major new features !

  The speed of adding new features was a great showcase of how agile our small teams and the larger community are. And I’m so proud to see automated testing becoming common practice among everyone hacking on Piwik !

  For the next few months until the new year we will focus on making what we have better. We will fix those rare but longstanding critical bugs, and aim to solve all Major issues and other must-have performance and general improvements. The core team and Piwik PRO will have the vision of making the existing Piwik and all plugins very stable and risk free. This includes edge cases, general bugs but also specific performance issues for high traffic or issues with edge case data payloads.

  We’ll be more pro-active and take Piwik platform to the next level of Performance, Security, Privacy & Reliability ! We will prove to the world that Free/Libre Web software can be of the highest standard of quality. By focusing on quality we will make Piwik even easier to maintain and improve in the future. We are building the best open platform that will let every user liberate their data and keep full control of it.

  If you have any feedback or questions get in touch or let’s continue the discussion in the forum.

  Thank you for your trust and for liberating your data with Piwik,

  Matthieu Aubry
  Piwik founder

  More information

  • How long is each release of Piwik maintained for ? (FAQ)
  • When is the next release of Piwik ? What is the release schedule ? (FAQ)
  • Pulse of Piwik : our monthly pulse report shows 27 different people contributed to Piwik core in the last month !

  

  This is an amazing testament of the power of free/libre software and yet we think this is just the beginning. We hope more developers will join and contribute to the Piwik project !