c++ - cvCreateFileCapture() -
in learning opencv
book, following mentioned statement:
cvcapture* capture = cvcreatefilecapture(argv[1]);
the function
cvcreatefilecapture()
takes argument name of avi file loaded , returns pointercvcapture
structure.
can explain sentence: "then returns pointer cvcapture
structure"?
it allocates new cvcapture
structure , returns pointer structure. don't access fields of structure pass pointer other functions work on file capture, cvqueryframe
or cvsetcaptureproperty
. , don't forget free resources cvreleasecapture
when you're done file.
this shouldn't hard understand basic c-knowledge, respect many opencv function work way.
by way, question tagged c++, consider using c++-interface of opencv, abstracts many of things away. although there no real book it, c-interface.
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