這篇文章將為大家詳細(xì)講解有關(guān)Qt如何實(shí)現(xiàn)視頻監(jiān)控畫面，小編覺得挺實(shí)用的，因此分享給大家做個參考，希望大家閱讀完這篇文章后可以有所收獲。
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視頻監(jiān)控系統(tǒng)在整個安防領(lǐng)域，已經(jīng)做到了爛大街的程序，全國起碼幾百家公司做過類似的系統(tǒng)，當(dāng)然這一方面的需求量也是非常旺盛的，各種定制化的需求越來越多，尤其是這幾年借著人臉識別的東風(fēng)，發(fā)展更加迅猛，人臉識別相關(guān)的技術(shù)和應(yīng)用這幾年處于風(fēng)口浪尖，衍生了特別多的應(yīng)用產(chǎn)品，各種人臉識別的產(chǎn)品遍地開花，刷臉門禁，車站機(jī)場人臉識別，刷臉取票等，但是其實(shí)大部分內(nèi)行人士可能都比較絕望，外行感覺像看科幻片一樣，老板們各種打雞血，今天幾個億明天幾個億。
縱觀Qt的應(yīng)用場景領(lǐng)域，在國內(nèi)，基本上在安防、航天船舶、教育、工業(yè)控制領(lǐng)域，占有比較大的比例，其實(shí)個人非常喜愛Qt的，從沒見過如此完美的API封裝，包括命名，最牛逼的就是跨平臺特性，可以說完爆.NET的跨平臺，甚至連那種幾十兆的嵌入式linux版本都能運(yùn)行，這就使得成本大大降低，提高了產(chǎn)品的豐富性。自從用了Qt以后，就再也不想用VC/VB/C#等。
視頻監(jiān)控畫面在任何視頻監(jiān)控系統(tǒng)中是少不了的一個功能，基本上是需要1畫面、4畫面、6畫面、8畫面、9畫面、16畫面等，Qt提供的表格布局非常勝任這個工作，網(wǎng)上幾乎沒有看到qt做的最基礎(chǔ)的視頻監(jiān)控畫面分割的demo，今天特意花幾分鐘提取出來，開源放出來。歡迎大家多多點(diǎn)贊！現(xiàn)在還增加了25畫面、36畫面，里邊的函數(shù)封裝的很好，稍微加幾行可以直接增加49畫面等其他的。
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void VideoPanel::change_video(int index, int flag)
{
int count = 0;
int row = 0;
int column = 0;
for (int i = 0; i < videoCount; i++) {
if (i >= index) {
gridLayout->addWidget(widgets.at(i), row, column);
widgets.at(i)->setVisible(true);
count++;
column++;
if (column == flag) {
row++;
column = 0;
}
}
if (count == (flag * flag)) {
break;
}
}
}
void VideoPanel::change_video_4(int index)
{
hide_video_all();
change_video(index, 2);
}
void VideoPanel::change_video_6(int index)
{
hide_video_all();
if (index == 0) {
gridLayout->addWidget(widgets.at(0), 0, 0, 2, 2);
gridLayout->addWidget(widgets.at(1), 0, 2, 1, 1);
gridLayout->addWidget(widgets.at(2), 1, 2, 1, 1);
gridLayout->addWidget(widgets.at(3), 2, 2, 1, 1);
gridLayout->addWidget(widgets.at(4), 2, 1, 1, 1);
gridLayout->addWidget(widgets.at(5), 2, 0, 1, 1);
for (int i = 0; i < 6; i++) {
widgets.at(i)->setVisible(true);
}
} else if (index == 5) {
gridLayout->addWidget(widgets.at(5), 0, 0, 2, 2);
gridLayout->addWidget(widgets.at(6), 0, 2, 1, 1);
gridLayout->addWidget(widgets.at(7), 1, 2, 1, 1);
gridLayout->addWidget(widgets.at(8), 2, 2, 1, 1);
gridLayout->addWidget(widgets.at(9), 2, 1, 1, 1);
gridLayout->addWidget(widgets.at(10), 2, 0, 1, 1);
for (int i = 5; i < 11; i++) {
widgets.at(i)->setVisible(true);
}
} else if (index == 10) {
gridLayout->addWidget(widgets.at(10), 0, 0, 2, 2);
gridLayout->addWidget(widgets.at(11), 0, 2, 1, 1);
gridLayout->addWidget(widgets.at(12), 1, 2, 1, 1);
gridLayout->addWidget(widgets.at(13), 2, 2, 1, 1);
gridLayout->addWidget(widgets.at(14), 2, 1, 1, 1);
gridLayout->addWidget(widgets.at(15), 2, 0, 1, 1);
for (int i = 10; i < 16; i++) {
widgets.at(i)->setVisible(true);
}
}
}
void VideoPanel::change_video_8(int index)
{
hide_video_all();
if (index == 0) {
gridLayout->addWidget(widgets.at(0), 0, 0, 3, 3);
gridLayout->addWidget(widgets.at(1), 0, 3, 1, 1);
gridLayout->addWidget(widgets.at(2), 1, 3, 1, 1);
gridLayout->addWidget(widgets.at(3), 2, 3, 1, 1);
gridLayout->addWidget(widgets.at(4), 3, 3, 1, 1);
gridLayout->addWidget(widgets.at(5), 3, 2, 1, 1);
gridLayout->addWidget(widgets.at(6), 3, 1, 1, 1);
gridLayout->addWidget(widgets.at(7), 3, 0, 1, 1);
for (int i = 0; i < 8; i++) {
widgets.at(i)->setVisible(true);
}
} else if (index == 8) {
gridLayout->addWidget(widgets.at(8), 0, 0, 3, 3);
gridLayout->addWidget(widgets.at(9), 0, 3, 1, 1);
gridLayout->addWidget(widgets.at(10), 1, 3, 1, 1);
gridLayout->addWidget(widgets.at(11), 2, 3, 1, 1);
gridLayout->addWidget(widgets.at(12), 3, 3, 1, 1);
gridLayout->addWidget(widgets.at(13), 3, 2, 1, 1);
gridLayout->addWidget(widgets.at(14), 3, 1, 1, 1);
gridLayout->addWidget(widgets.at(15), 3, 0, 1, 1);
for (int i = 8; i < 16; i++) {
widgets.at(i)->setVisible(true);
}
}
}
void VideoPanel::change_video_9(int index)
{
hide_video_all();
change_video(index, 3);
}
void VideoPanel::change_video_13(int index)
{
hide_video_all();
if (index == 0) {
gridLayout->addWidget(widgets.at(0), 0, 0, 1, 1);
gridLayout->addWidget(widgets.at(1), 0, 1, 1, 1);
gridLayout->addWidget(widgets.at(2), 0, 2, 1, 1);
gridLayout->addWidget(widgets.at(3), 0, 3, 1, 1);
gridLayout->addWidget(widgets.at(4), 1, 0, 1, 1);
gridLayout->addWidget(widgets.at(5), 2, 0, 1, 1);
gridLayout->addWidget(widgets.at(6), 1, 1, 2, 2);
gridLayout->addWidget(widgets.at(7), 1, 3, 1, 1);
gridLayout->addWidget(widgets.at(8), 2, 3, 1, 1);
gridLayout->addWidget(widgets.at(9), 3, 0, 1, 1);
gridLayout->addWidget(widgets.at(10), 3, 1, 1, 1);
gridLayout->addWidget(widgets.at(11), 3, 2, 1, 1);
gridLayout->addWidget(widgets.at(12), 3, 3, 1, 1);
for (int i = 0; i < 13; i++) {
widgets.at(i)->setVisible(true);
}
} else if (index == 3) {
gridLayout->addWidget(widgets.at(3), 0, 0, 1, 1);
gridLayout->addWidget(widgets.at(4), 0, 1, 1, 1);
gridLayout->addWidget(widgets.at(5), 0, 2, 1, 1);
gridLayout->addWidget(widgets.at(6), 0, 3, 1, 1);
gridLayout->addWidget(widgets.at(7), 1, 0, 1, 1);
gridLayout->addWidget(widgets.at(8), 2, 0, 1, 1);
gridLayout->addWidget(widgets.at(9), 1, 1, 2, 2);
gridLayout->addWidget(widgets.at(10), 1, 3, 1, 1);
gridLayout->addWidget(widgets.at(11), 2, 3, 1, 1);
gridLayout->addWidget(widgets.at(12), 3, 0, 1, 1);
gridLayout->addWidget(widgets.at(13), 3, 1, 1, 1);
gridLayout->addWidget(widgets.at(14), 3, 2, 1, 1);
gridLayout->addWidget(widgets.at(15), 3, 3, 1, 1);
for (int i = 3; i < 16; i++) {
widgets.at(i)->setVisible(true);
}
}
}
void VideoPanel::change_video_16(int index)
{
hide_video_all();
change_video(index, 4);
}
void VideoPanel::change_video_25(int index)
{
hide_video_all();
change_video(index, 5);
}
void VideoPanel::change_video_36(int index)
{
hide_video_all();
change_video(index, 6);
}
void VideoPanel::change_video_64(int index)
{
hide_video_all();
change_video(index, 8);
}
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