void Video::loadVideos() {
const char *path = "/Users/Jobs/Documents/Xcode/HolumV0.1/HolumV0.1/Resource Files";
string videoPath(path);
struct dirent *entry;
DIR *dp;
dp = opendir(path);
if(dp == NULL) {
cout << "Errore 004: Il percorso della directory video non esiste o non รจ definito.";
return -1;
}
while((entry = readdir(dp))) {
string videoName = string(entry->d_name);
int videoNameLen = strlen(videoName.c_str());
if(checkExtension(videoName, videoNameLen)) {
videoPath += "/" + videoName;
FileVideo fv(videoPath, videoName.substr(0, videoName.find(".")));
videoFiles.push_back(fv);
}
}
closedir(dp);
}
/* images will be saved in the current directory by default */
std::vector<string> capture(int startFrame, int endFrame, bool output = false, const char* path = "", string filename = "") {
/* total number of frames */
size_t total = endFrame - startFrame;
/* dynamical array of images for storing all the frames */
/* store string rather than Image objects because those objects will eat all the memory */
std::vector<string> images;
this->setFrames(startFrame, false);
#ifdef FFMPEG
/* use ffmpeg to improve speed */
string videoPath(this->path);
string framePath(path);
string cmd = "ffmpeg -r \"" + Common::doubleToStr(this->getVideo().get(CV_CAP_PROP_FPS)) + "\" -ss " + Common::doubleToStr(startFrame / this->getVideo().get(CV_CAP_PROP_FPS)) + " -i " + videoPath + " -vframes \"" + Common::intToStr(total + 1) + "\" \"" + framePath + "f" + filename + "_%1d.png\"";
/* excute the command */
FILE* captureProcess = popen(cmd.c_str(), "w");
if (captureProcess == NULL) {
ostringstream os;
os << "Failed to capture frames from the video";
Common::errorPrint(os.str().c_str());
/* exit */
exit(-1);
}
pclose(captureProcess);
size_t i = 1;
for (; i <= total + 1; i++) {
/* save the image when output is [true] */
if (output && i >= startFrame) {
string num = Common::intToStr(i);
string reserved(path);
images.push_back(reserved + "f" + filename + "_" + num + ".png");
}
}
#endif
#ifndef FFMPEG
/* this loop will cost too much time */
size_t i = startFrame;
for (; i <= endFrame; i++) {
Mat reservedImg;
this->vdo.read(reservedImg);
/* save the image when output is [true] */
if (output && i >= startFrame) {
string num = Common::intToStr(i);
string reserved(path);
imwrite((reserved + filename + num + ".png").c_str(), reservedImg);
images.push_back(reserved + "f" + filename + "_" + num + ".png");
cout << "save image: " + num << endl;
}
}
#endif
return images;
}
