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fixed positioning in ffmpeg wrapper (thanks to mike_at_nrec for the patch). Added frame positioning feature to laplace demo to test the feature

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This commit is contained in:
Vadim Pisarevsky 2011-06-19 22:03:23 +00:00
parent c5088ca1b8
commit 2e520b05c4
1 changed files with 16 additions and 1 deletions
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17
samples/cpp/laplace.cpp
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@ -2,6 +2,7 @@
#include "opencv2/imgproc/imgproc.hpp" #include "opencv2/imgproc/imgproc.hpp"
#include <ctype.h> #include <ctype.h>
#include <stdio.h>
#include <iostream> #include <iostream>
using namespace cv; using namespace cv;
@ -26,8 +27,22 @@ int main( int argc, char** argv )
if( argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0]))) if( argc == 1 || (argc == 2 && strlen(argv[1]) == 1 && isdigit(argv[1][0])))
cap.open(argc == 2 ? argv[1][0] - '0' : 0); cap.open(argc == 2 ? argv[1][0] - '0' : 0);
else if( argc == 2 ) else if( argc >= 2 )
{
cap.open(argv[1]); cap.open(argv[1]);
if( cap.isOpened() )
cout << "Video " << argv[1] <<
": width=" << cap.get(CV_CAP_PROP_FRAME_WIDTH) <<
", height=" << cap.get(CV_CAP_PROP_FRAME_HEIGHT) <<
", nframes=" << cap.get(CV_CAP_PROP_FRAME_COUNT) << endl;
if( argc > 2 && isdigit(argv[2][0]) )
{
int pos;
sscanf(argv[2], "%d", &pos);
cout << "seeking to frame #" << pos << endl;
cap.set(CV_CAP_PROP_POS_FRAMES, pos);
}
}
if( !cap.isOpened() ) if( !cap.isOpened() )
{ {