fail to build client

[jinzhao-SU]

I am very interested in this project. Could you please check the error msg? I build server part successfully, but stuck with the client.

/usr/include/x86_64-linux-gnu/sys/select.h:78:0: note: this is the location of the previous definition
#define FD_SETSIZE __FD_SETSIZE
^
./src/main.cpp:87:10: error: aggregate ‘std::ofstream out_json_file’ has incomplete type and cannot be defined
ofstream out_json_file;
^
./src/main.cpp: In function ‘int main(int, char**)’:
./src/main.cpp:142:13: error: ‘CAP_PROP_FPS’ was not declared in this scope
cap.set(CAP_PROP_FPS, 20);
^
./src/main.cpp:143:13: error: ‘CAP_PROP_BUFFERSIZE’ was not declared in this scope
cap.set(CAP_PROP_BUFFERSIZE, 3);
^
./src/main.cpp:159:24: error: ‘CAP_PROP_FPS’ was not declared in this scope
double fps = cap.get(CAP_PROP_FPS);
^
./src/main.cpp:160:23: error: ‘CAP_PROP_FRAME_COUNT’ was not declared in this scope
end_frame = cap.get(CAP_PROP_FRAME_COUNT);
^
./src/main.cpp:176:43: error: invalid use of incomplete type ‘std::ofstream {aka class std::basic_ofstream}’
out_json_file = ofstream(out_json_path);
^
In file included from /usr/include/c++/5/ios:38:0,
from /usr/include/c++/5/ostream:38,
from /usr/include/c++/5/iostream:39,
from ./src/main.cpp:2:
/usr/include/c++/5/iosfwd:119:11: note: declaration of ‘std::ofstream {aka class std::basic_ofstream}’
class basic_ofstream;
^
./src/main.cpp:185:31: error: ‘fourcc’ is not a member of ‘cv::VideoWriter’
writer.open(out_vid_path, VideoWriter::fourcc('M', 'P', '4', 'V'), fps, Size(cap_width, cap_height), true);
^
Makefile:35: recipe for target 'obj/main.o' failed
make: *** [obj/main.o] Error 1

[imsoo]

@jinzhao-SU

Thank you for your interest in this repo.

---

/usr/include/x86_64-linux-gnu/sys/select.h:78:0: note: this is the location of the previous definition #define FD_SETSIZE __FD_SETSIZE

• This message can be ignored.

---

./src/main.cpp:87:10: error: aggregate ‘std::ofstream out_json_file’ has incomplete type and cannot be defined
ofstream out_json_file;

• Sorry, I forgot <fstream> header. I fixed it. Try this

---

./src/main.cpp:142:13: error: ‘CAP_PROP_FPS’ was not declared in this scope
cap.set(CAP_PROP_FPS, 20);

• It looks like OpenCV version problem. Try below changes. If it doesn't work let me know your OpenCV version.

Line	From	To
142	CAP_PROP_FPS	CV_CAP_PROP_FPS
143	CAP_PROP_BUFFERSIZE	CV_CAP_PROP_BUFFERSIZE
158	CAP_PROP_FPS	CV_CAP_PROP_FPS
159	CAP_PROP_FRAME_COUNT	CV_CAP_PROP_FRAME_COUNT
184	VideoWriter::fourcc('M', 'P', '4', 'V')	CV_FOURCC('M', 'P', '4', 'V')

---

Note : This client have a freezing issue on Linux.

If you have the same issue, please let me know.

[jinzhao-SU]

I change opencv to version 3.4 and then fix all the problems. Thank you for the detailed response.