mirror of
https://github.com/Laex/Delphi-OpenCV.git
synced 2024-11-16 16:25:53 +01:00
72 lines
1.7 KiB
ObjectPascal
72 lines
1.7 KiB
ObjectPascal
program Trackbar;
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{$APPTYPE CONSOLE}
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{$R *.res}
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uses
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System.SysUtils,
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Core.types_c in '..\..\include\ñore\Core.types_c.pas',
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core_c in '..\..\include\ñore\core_c.pas',
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highgui_c in '..\..\include\highgui\highgui_c.pas';
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Const
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filename = '768x576.avi';
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Var
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capture: pCvCapture = nil;
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frame: pIplImage = nil;
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framesCount: Double;
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frames: Integer;
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currentPosition: Integer;
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c: Integer;
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// ôóíêöèÿ-îáðàáîò÷èê ïîëçóíêà -
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// ïåðåìàòûâàåò íà íóæíûé êàäð
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procedure myTrackbarCallback(pos: Integer); cdecl;
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begin
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cvSetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES, pos);
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end;
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begin
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try
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// îêíî äëÿ îòîáðàæåíèÿ êàðòèíêè
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cvNamedWindow('original', CV_WINDOW_AUTOSIZE);
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// ïîëó÷àåì èíôîðìàöèþ î âèäåî-ôàéëå
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capture := cvCreateFileCapture(filename);
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// ïîëó÷àåì ÷èñëî êàäðîâ
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framesCount := cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);
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Writeln('[i] count: ', framesCount);
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frames := Trunc(framesCount);
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currentPosition := 0;
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if (frames <> 0) then
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// ïîêàçûâàåì ïîëçóíîê
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cvCreateTrackbar('Position', 'original', @currentPosition, frames, myTrackbarCallback);
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while True do
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begin
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// ïîëó÷àåì ñëåäóþùèé êàäð
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frame := cvQueryFrame(capture);
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if not Assigned(frame) then
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Break;
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// çäåñü ìîæíî âñòàâèòü
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// ïðîöåäóðó îáðàáîòêè
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// ïîêàçûâàåì êàäð
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cvShowImage('original', frame);
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c := cvWaitKey(33);
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if (c = 27) then
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Break; // åñëè íàæàòà ESC - âûõîäèì
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end;
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// îñâîáîæäàåì ðåñóðñû
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cvReleaseCapture(capture);
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// óäàëÿåì îêíî
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cvDestroyWindow('original');
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except
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on E: Exception do
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Writeln(E.ClassName, ': ', E.Message);
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end;
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end.
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