IDT Source Code Running Guide（Linux+ffmpeg-0.11.1+opencv-2.4.2）

来源 ：仅作翻译使用

https://blog.youkuaiyun.com/sinat_27318881/article/details/52103896#commentBox

1. ffmpeg-0.11.1 Configuration

Due to opencv needs ffmpeg to decode video data, so we should install ffmepg first. If you have already installed opencv , i suggest to uninstall the opencv .
ffmpeg and opencv download address : http://lear.inrialpes.fr/people/wang/improved_trajectories
Then decompress to the directory ffmpeg-0.11.1.
Open the terminal input the command as follows:

1. delete the ffmpeg which had already install to avoid conflict
   sudo apt-get remove ffmpeg x264
sudo apt- get autoremove
2. Install necessary support
   sudo apt-get install make automake g++ bzip2 python unzip patch subversion ruby build-essential git-core checkinstall yasm texi2html libfaac-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libsdl1.2-dev libtheora-dev libvdpau-dev libvorbis-dev libvpx-dev libx11-dev libxfixes-dev libxvidcore-dev zlib1g-dev
   In the above command， we install multiple necessary support which are after automake and use spaces to separate them. It can also be installed separately.
3. Compile in folder ffmpeg-0.1.11.1
   ./configure --enable-gpl --enable-nonfree --enable-version3 --enable-shared --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-libvpx
   Success is indicated by the following figure
   
   if there is a problem with xxx not found ，it may lack of decoder, you can download x264 . Then enter the folder cd x264, and use the command as follows
   ./configure --enable-static --enable-shared
   If no error is reported, return the third compilation step
4. Install
   make
make install
idconfig
5. Test
   Using the command ffmpeg， If an error is reported, it may conflict with gstreamer’s dynamic library. Unload gstreamer. But if you uninstall gstreamer’s multimedia software, it will not work. So you can uninstall ffmpeg and recompile it into a static library. In the third step, enable-shared is replaced by enable-static.（Static libraries are not recommended.）
   If there are still errors, try adding - prefix=/usr/local/ffmpeg after. / configure in step 3

2. OpenCV-2.4.2 Configuration

1. Install necessary support
   apt-get install pkg-config
export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
apt-get install cmake
2. Install openCV
   Download and unzip to the opencv2.4.2 folder
   mkdir release
cd release
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D BUILD_PYTHON_SUPPORT=ON
   Success is indicated by the following figure
   
   Finally make , make install idconfig

3. Setting environment variables

sudo vim /etc/ld.so.conf.d/opencv.conf
add /usr/local/lib at the end。（Here you use VIM editing commands, you should know the basic VIM commands）
Finally idconfig

4. IDT Source Running

Download : http://lear.inrialpes.fr/people/wang/improved_trajectories
Enter folder input after decompression and use make , You can see the release folder, where Video and DenseTrackStab are executable files, and then enter: ./release/DenseTrackStab ./test_sequences/person01_boxing_d1_uncomp.avi
You can see a string of numbers flashing through the terminal, if you first modify the DenseTrackStab. CPP Change 0 to 1 for better visualization int show_track = 0;
To output features, enter: ./release/DenseTrackTrack ./test_sequences/person01_boxing_d1_uncomp.avi | gzip > out.features.gz
The source code supports the following parameter modifications

Here’s the structure of feature:
The feature is that each of the calculations is a separate column, given in the following format:

frameNum mean_x mean_y var_x var_y length scale x_pos y_pos t_pos Trajectory HOG HOF MBHx MBHy

The first ten parts are about trajectories:

The following five parts are connected one by one: