C++ (Cpp) cvHaveImageWriter Examples

Example #1

File: cvcap_gstreamer.cpp Project: alejotima/opencv

CvVideoWriter* cvCreateVideoWriter_GStreamer( const char* filename )
{
	CvVideoWriter_GStreamer *writer;

	unsigned offset = 0;
	char *name = icvExtractPattern(filename, &offset);
	if(!name)
		return 0;

	char str[100];
	char *x = str;
	int size = 100;
	while(snprintf(x, size, name, 0) == size - 1) {
		size *= 2;
		if(x == str)
			x = (char *)malloc(size);
		else
			x = (char *)realloc(x, size);
	}
	if(!cvHaveImageWriter(x)) {
		if(x != str)
			free(x);
		return 0;
	}
	if(x != str)
		free(x);

	writer = (CvVideoWriter_GStreamer *)cvAlloc(sizeof(CvCapture_GStreamer));
	memset(writer, 0, sizeof(CvVideoWriter_GStreamer));
	writer->filename = strdup(name);
	writer->currentframe = offset;

	return (CvVideoWriter *)writer;
}

Example #2

File: cap_images.cpp Project: 353/viewercv

bool CvVideoWriter_Images::open(const char* _filename) {
    unsigned offset = 0;

    close();

    filename = icvExtractPattern(_filename, &offset);
    if (!filename) {
        return false;
    }

    char str[_MAX_PATH];
    sprintf(str, filename, 0);
    if (!cvHaveImageWriter(str)) {
        close();
        return false;
    }

    currentframe = offset;
    return true;
}