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• Concatenating image with video for Freeze frame effect

  12 mai 2015, par Code_Ed_Student

  I am currently trying to achieve with ffmepg a freeze frame effect. This is something easy to do with adobe after effects shown here. However I would like to achieve a freeze frame effect(of 5 seconds duration) followed by the 15 second video for the final output video. This should amount to a final duration of 20 seconds. However with the settings below, I am getting a still image with the video following but it does not show a "freeze frame effect". How can I achieve a "freeze frame effect" in ffmpeg ?

  //create image

  ffmpeg -i "/media/test/test.mp4" -ss 00:00:00.023222 -vframes 1 "/media/test/test.png"

  //create freeze image effect

  ffmpeg -i "/media/test/test.mp4" -loop 1 -i "/media/test/test.jpg" -an \
  
  -filter_complex "[1:v]trim=start=0:end=5[ol];[0:v]setpts=[nv];[nv][ol]overlay=eof_action=pass[final]" \
  
  -map '[final]' -c:a aac -strict experimental -c:v libx264 -q 1 "/media/test/test_effect.mp4"

• Seek and pause video stream from ffserver

  9 mai 2015, par Bresiu

  I managed to successfully feed ffserver from ffmpeg. ffmpeg takes input as PIPE :

  ffmpeg -loglevel fatal -f image2pipe -re -vcodec png -i - -vcodec libx264 http://localhost:8090/%s.ffm

  External java process generates svg/png images and pushes to ffpmepg

  My ffserver config allows me to buffer live feeds in ffm file without defining the size of the file.

  My stream configuration looks like this :

  <stream>
  
     Feed feed2.ffm
  
     Format mpjpeg
  
     VideoFrameRate 25
  
     VideoSize 640x880
  
     VideoQMin 1
  
     VideoQMax 5
  
     NoAudio
  
     Strict -1
  
  </stream>

  The problem is that, despite that I can watch streams in VLC by opening network :

  http://0.0.0.0:8090/live2.mjpg

  But I can not seek through already buffered movie.
  Is there a way to achieve seeking through movie, pausing, and resume playing from "now" ? I have tried already rtsp with h264, mpg and sdp but without success :

  <stream></stream>sdp/h264>
  
     Format rtp
  
     Feed feed2.ffm
  
     VideoCodec libx264
  
     VideoSize 640x880
  
     VideoQMin 1
  
     VideoQMax 5
  
     NoAudio
  
     Strict -1
  
     VideoFrameRate 25

  Is rtsp solution for this problem, or I need something else ?

  Can this be achieved from dynamic file since I am using PIPE ?

• make error in OpenCV installation on ubuntu (ffmpeg CODEC_ID_XXXX was not declared in scope)

  22 avril 2015, par Anurag Priyadarshi

  I am trying to install OpenCV following this tutorial. I am through cmake.(The configuration is given at the end.) However make shows error :make[2]: ***[modules/highgui/CMakeFiles/opencv_highgui.dir/src/cap_ffmpeg.cpp.o] Error 1
  One link pointed out reason as different version of opencv and ffmpeg, but I found a piece of code in cap_ffmpeg_impl.hpp that appears to be handling it.

  #if LIBAVCODEC_BUILD >= CALC_FFMPEG_VERSION(54,25,0)
  
  #  define CV_CODEC_ID AVCodecID
  
  #  define CV_CODEC(name) AV_##name
  
  #else
  
  #  define CV_CODEC_ID CodecID
  
  #  define CV_CODEC(name) name
  
  #endif

  Not sure if it is ok for this to be commented.

  Also, I could try installing ffmpeg seperately, but I am not sure how dependencies are handled in this installation around libav.

  Would be thankful for any help in solving this problem, as well as tips/links for OpenCV installation in general.

  make configuration :

  -- General configuration for OpenCV 2.4.11 ====================================
  
  Version control:               unknown
  
  -- 
  
  --   Platform:
  
  --     Host:                        Linux 3.16.0-32-generic i686
  
  --     CMake:                       2.8.12.2
  
  --     CMake generator:             Unix Makefiles
  
  --     CMake build tool:            /usr/bin/make
  
  --     Configuration:               RELEASE
  
  -- 
  
  --   C/C++:
  
  --     Built as dynamic libs?:      YES
  
  --     C++ Compiler:                /usr/bin/c++  (ver 4.9.1)
  
  --     C++ flags (Release):         -fsigned-char -W -Wall -Werror=return-type -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 -pthread -march=i686 -fomit-frame-pointer -msse -msse2 -msse3 -mfpmath=sse -ffunction-sections -O2 -DNDEBUG  -DNDEBUG
  
  --     C++ flags (Debug):           -fsigned-char -W -Wall -Werror=return-type -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 -pthread -march=i686 -fomit-frame-pointer -msse -msse2 -msse3 -mfpmath=sse -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
  
  --     C Compiler:                  /usr/bin/cc
  
  --     C flags (Release):           -fsigned-char -W -Wall -Werror=return-type -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 -pthread -march=i686 -fomit-frame-pointer -msse -msse2 -msse3 -mfpmath=sse -ffunction-sections -O2 -DNDEBUG  -DNDEBUG
  
  --     C flags (Debug):             -fsigned-char -W -Wall -Werror=return-type -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 -pthread -march=i686 -fomit-frame-pointer -msse -msse2 -msse3 -mfpmath=sse -ffunction-sections -g  -O0 -DDEBUG -D_DEBUG
  
  --     Linker flags (Release):      
  
  --     Linker flags (Debug):        
  
  --     Precompiled headers:         YES
  
  -- 
  
  --   OpenCV modules:
  
  --     To be built:                 core flann imgproc highgui features2d calib3d ml video legacy objdetect photo gpu ocl nonfree contrib java python stitching superres ts videostab
  
  --     Disabled:                    world
  
  --     Disabled by dependency:      -
  
  --     Unavailable:                 androidcamera dynamicuda viz
  
  -- 
  
  --   GUI: 
  
  --     QT 5.x:                      YES (ver 5.3.0)
  
  --     QT OpenGL support:           YES (Qt5::OpenGL 5.3.0)
  
  --     OpenGL support:              YES (/usr/lib/i386-linux-gnu/libGLU.so /usr/lib/i386-linux-gnu/libGL.so /usr/lib/i386-linux-gnu/libSM.so /usr/lib/i386-linux-gnu/libICE.so /usr/lib/i386-linux-gnu/libX11.so /usr/lib/i386-linux-gnu/libXext.so)
  
  --     VTK support:                 NO
  
  -- 
  
  --   Media I/O: 
  
  --     ZLib:                        /usr/lib/i386-linux-gnu/libz.so (ver 1.2.8)
  
  --     JPEG:                        /usr/lib/i386-linux-gnu/libjpeg.so (ver )
  
  --     PNG:                         /usr/lib/i386-linux-gnu/libpng.so (ver 1.2.51)
  
  --     TIFF:                        /usr/lib/i386-linux-gnu/libtiff.so (ver 42 - 4.0.3)
  
  --     JPEG 2000:                   /usr/lib/i386-linux-gnu/libjasper.so (ver 1.900.1)
  
  --     OpenEXR:                     /usr/lib/i386-linux-gnu/libImath.so /usr/lib/i386-linux-gnu/libIlmImf.so /usr/lib/i386-linux-gnu/libIex.so /usr/lib/i386-linux-gnu/libHalf.so /usr/lib/i386-linux-gnu/libIlmThread.so (ver 1.6.1)
  
  -- 
  
  --   Video I/O:
  
  --     DC1394 1.x:                  NO
  
  --     DC1394 2.x:                  YES (ver 2.2.1)
  
  --     FFMPEG:                      YES
  
  --       codec:                     YES (ver 56.1.0)
  
  --       format:                    YES (ver 56.1.0)
  
  --       util:                      YES (ver 54.3.0)
  
  --       swscale:                   YES (ver 3.0.0)
  
  --       gentoo-style:              YES
  
  --     GStreamer:                   NO
  
  --     OpenNI:                      NO
  
  --     OpenNI PrimeSensor Modules:  NO
  
  --     PvAPI:                       NO
  
  --     GigEVisionSDK:               NO
  
  --     UniCap:                      NO
  
  --     UniCap ucil:                 NO
  
  --     V4L/V4L2:                    Using libv4l1 (ver 1.2.1) / libv4l2 (ver 1.2.1)
  
  --     XIMEA:                       NO
  
  --     Xine:                        NO
  
  -- 
  
  --   Other third-party libraries:
  
  --     Use IPP:                     NO
  
  --     Use Eigen:                   YES (ver 3.2.1)
  
  --     Use TBB:                     YES (ver 4.2 interface 7000)
  
  --     Use OpenMP:                  NO
  
  --     Use GCD                      NO
  
  --     Use Concurrency              NO
  
  --     Use C=:                      NO
  
  --     Use Cuda:                    NO
  
  --     Use OpenCL:                  YES
  
  -- 
  
  --   OpenCL:
  
  --     Version:                     dynamic
  
  --     Include path:                /home/keeda/Downloads/data_analysis/opencv-2.4.11/3rdparty/include/opencl/1.2
  
  --     Use AMD FFT:                 NO
  
  --     Use AMD BLAS:                NO
  
  -- 
  
  --   Python:
  
  --     Interpreter:                 /usr/bin/python2 (ver 2.7.8)
  
  --     Libraries:                   /usr/lib/i386-linux-gnu/libpython2.7.so (ver 2.7.8)
  
  --     numpy:                       /usr/local/lib/python2.7/dist-packages/numpy/core/include (ver 1.9.1)
  
  --     packages path:               lib/python2.7/dist-packages
  
  -- 
  
  --   Java:
  
  --     ant:                         /usr/bin/ant (ver 1.9.4)
  
  --     JNI:                         /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include /usr/lib/jvm/default-java/include
  
  --     Java tests:                  YES
  
  -- 
  
  --   Documentation:
  
  --     Build Documentation:         YES
  
  --     Sphinx:                      /usr/bin/sphinx-build (ver 1.2.2)
  
  --     PdfLaTeX compiler:           /usr/bin/pdflatex
  
  --     Doxygen:                     NO
  
  -- 
  
  --   Tests and samples:
  
  --     Tests:                       YES
  
  --     Performance tests:           YES
  
  --     C/C++ Examples:              YES
  
  -- 
  
  --   Install path:                  /usr/local
  
  -- 
  
  --   cvconfig.h is in:              /home/keeda/Downloads/data_analysis/opencv-2.4.11/build
  
  -- -----------------------------------------------------------------