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https://github.com/wang-bin/QtAV.git
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87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
/******************************************************************************
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VideoGroup: this file is part of QtAV examples
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Copyright (C) 2014-2015 Wang Bin <wbsecg1@gmail.com>
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* This file is part of QtAV
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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******************************************************************************/
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#include <QtAV/VideoFrameExtractor.h>
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#include <QApplication>
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#include <QWidget>
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#include <QtAVWidgets>
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#include <QtDebug>
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#include <QtCore/QElapsedTimer>
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using namespace QtAV;
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class VideoFrameObserver : public QObject
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{
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Q_OBJECT
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public:
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VideoFrameObserver(QObject *parent = 0) : QObject(parent)
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{
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view = VideoRendererFactory::create(VideoRendererId_GLWidget2);
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view->widget()->resize(400, 300);
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view->widget()->show();
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}
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public Q_SLOTS:
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void onVideoFrameExtracted(const QtAV::VideoFrame& frame) {
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view->receive(frame);
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qApp->processEvents();
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qDebug("frame %dx%d @%f", frame.width(), frame.height(), frame.timestamp());
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}
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private:
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VideoRenderer *view;
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};
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int main(int argc, char** argv)
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{
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QApplication a(argc, argv);
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int idx = a.arguments().indexOf("-f");
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if (idx < 0) {
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qDebug("-f file -t sec -n count -asyc");
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return -1;
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}
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QString file = a.arguments().at(idx+1);
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idx = a.arguments().indexOf("-t");
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int t = 0;
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if (idx > 0)
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t = a.arguments().at(idx+1).toInt();
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int n = 1;
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idx = a.arguments().indexOf("-n");
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if (idx > 0)
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n = a.arguments().at(idx+1).toInt();
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bool async = a.arguments().contains("-async");
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VideoFrameExtractor extractor;
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extractor.setAsync(async);
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VideoFrameObserver obs;
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QObject::connect(&extractor, SIGNAL(frameExtracted(QtAV::VideoFrame)), &obs, SLOT(onVideoFrameExtracted(QtAV::VideoFrame)));
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extractor.setSource(file);
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QElapsedTimer timer;
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timer.start();
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for (int i = 0; i < n; ++i) {
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// async does not work. you have to set a new position when frameExtracted is emitted
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extractor.setPosition(t + 1000*i);
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}
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qDebug("elapsed: %lld", timer.elapsed());
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return a.exec();
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}
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#include "main.moc"
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