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• How can low frame rate video be made to look more smooth ?

  14 décembre 2016, par d3pd

  I am trying to clean up a video that was recorded in 2003 in low-light conditions on what was possibly a cameraphone. The video has been cleaned up somewhat (cropped, logos removed and stabilized), but it remains quite jerky, due in large part to its low frame rate. What are some tricks that might clean up the video in this regard ? I feel that I am asking for something a bit like tweening in flash animations, but for pixels, whereby additional frames are generated using nearby frames of the video. Does such a trick exist ? Is there another way to approach this problem ?

  To reproduce the video processing so far, take the following steps :

  # get video
  
  wget http://www.anwarweb.net/saddamdown.wmv
  
  # crop
  
  ffmpeg -i saddamdown.wmv -filter:v "crop=292:221:14:10" -c:a copy saddamdown_crop.wmv
  
  # remove logo 1
  
  ffmpeg -i saddamdown_crop.wmv -vf delogo=x=17:y=77:w=8:h=54 -c:a copy saddamdown_crop_delogo_1.wmv
  
  # remove logo 2
  
  ffmpeg -i saddamdown_crop_delogo_1.wmv -vf delogo=x=190:y=174:w=54:h=8 -c:a copy saddamdown_crop_delogo_1_delogo_2.wmv
  
  # stabilize
  
  ffmpeg -i saddamdown_crop_delogo_1_delogo_2.wmv -vf deshake saddamdown_crop_delogo_1_delogo_2_deshake.wmv

  Note : The video is of the Saddam Hussein execution.

• FFMPEG Compile Custom

  14 décembre 2016, par Madskillz RCE

  I need to compile FFMPEG with version 2.1.8 of source and with the following options -

  ./configure --arch=x86 --target-os=mingw32 --cross-prefix=i686-w64-mingw32- --cc=i686-w64-mingw32-gcc --disable-postproc --enable-shared --disable-static --disable-decoder=libvpx --disable-encoder=aac --enable-avisynth --enable-gpl --enable-version3 --enable-pthreads --enable-avfilter --enable-runtime-cpudetect --enable-nonfree --pkg-config=pkg-config --enable-libquvi --enable-libfaac --enable-libnut --enable-libgsm --enable-libfreetype --enable-libvorbis --enable-libspeex --enable-libmp3lame --enable-zlib --enable-libtheora --enable-bzlib --enable-libvpx --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libschroedinger --enable-librtmp --enable-libass --enable-libx264 --enable-libbluray --enable-openssl --enable-libflite --enable-libsox --disable-ffplay --enable-libcdio --enable-libcelt --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libxavs --disable-outdev=sdl --disable-muxers --enable-muxer=encx --extra-cflags=-I/usr/i686-mingw32/include --extra-ldflags=-L/usr/i686-mingw32/lib --extra-libs='-lx264 -lpthread -lwinmm -llua -liconv -lcurl -lws2_32 -lssl -lcrypto -lwldap32 -lgdi32 -lwsock32' 

  I need to know on which system will be good to compile this ?

  also some libraries might be obsolete so where can I find them ?

  Please provide your input how would you compile it ?

  The configuration was extracted from a custom version of avcodec-55.dll , need to demux a video using new compiled ffmpeg.

  Regards

• opencv3.1 python VideoCapture black screen

  3 mai 2017, par alex

  i’m trying to use opencv3.1 with python3.5
  following this official)tutorial
  http://docs.opencv.org/3.0-beta/doc/py_tutorials/py_gui/py_video_display/py_video_display.html#display-video

  the camera led is "on" but the window doesn’t show any image (black)

  my current enviroment :
   windows 10
   python 3.5.2 (32bit)
   numpy 1.12.0b1 (32bit) binaries downloaded from : http://www.lfd.uci.edu/ gohlke/pythonlibs/
   opencv 3.1.0 (32bit) binaries downloaded from : http://www.lfd.uci.edu/ gohlke/pythonlibs/

  they seem installed correctly !

  as the tutorial says :

  Note Make sure proper versions of ffmpeg or gstreamer is installed. Sometimes, it is a headache to work with Video Capture mostly due to wrong installation of ffmpeg/gstreamer.

  i’ve no ffmpeg installed !!! so i suppose this is the cause of my problem
  so the questions are :
  1) which version of ffmpeg is needed ?
  2) how install ffmpeg on windows ? it seems a setup doesn’t exist(there is a binary section with a zip file ? how to use it after unzipped ?)
  3) is possible to see(in some way) if the opencv binaries(that i’ve downloaded) were compiled with ffmpeg support(flag ?)

  PS : i’ve tried to add the ffmpeg folder path the the PATH enviroment variable but nothing change