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                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                在某個項目中需要在樹莓派上播放廣告視頻,由于QT默認的QMultimedia播放視頻性能堪憂(也可能沒有用好!),于是想到了omxplayer這個性能一流的的播放器。 # 第1步,安裝ffmpeg ###配置C++編譯開發環境 ~~~ $ sudo apt-get install build-essential ~~~ 安裝automake ~~~ $ sudo apt-get install automake1.11 ~~~ 如果是windows環境,還要安裝yasm ~~~ $ sudo apt-get install yasm ~~~ 通過git下載ffmpeg源碼 ~~~ $sudo git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg ~~~ 生成makefile,編譯 ~~~ ./configure make make install ~~~ 在樹莓派下默認安裝是在/usr/local 頭文件在/usr/local/include 庫文件在/usr/local/lib # 第2步,安裝omxplayer 可通過git下載源碼安裝 ~~~ https://github.com/popcornmix/omxplayer ~~~ 也可apt-get直接安裝編譯好的包 ~~~ $ sudo apt-get install omxplayer ~~~ 現在可通過命令行輸入播放視頻了 ~~~ $ omxplayer /home/pi/myVideo.mp4 --win '100,100,500,300' 在100,100處播放myVideo.mp4,視頻大小設定為500 × 300 ~~~ # 第3步,python使用dbus調用omxplayer 找到一個pytho的調用omxplayer的程序,哈哈 https://github.com/willprice/python-omxplayer-wrapper/ 下載安裝 ~~~ $ git clone https://github.com/willprice/python-omxplayer-wrapper python-omxplayer-wrapper ~~~ 確保python-dbus已經安裝了 ~~~ $ sudo apt-get install python-dbus ~~~ 進入python-omxplayer-wrapper目錄安裝 ~~~ $ python setup.py install ~~~ 然后就是照著例子寫個Hello程序吧 ``` from omxplayer import OMXPlayer from time import sleep player = OMXPlayer('/home/pi/myVideo.mp4', args=['--win','100,100,500,300']) player.play() sleep(5) player.pause() player.quit() ``` # 第4步,使用QT調用omxplayer 在樹莓派上,使用QT5.3編譯 ~~~ #include "mainwindow.h" #include "ui_mainwindow.h" #include <QStringList> #include <QtCore/QCoreApplication> #include <QtDBus/QtDBus> MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); QString prog = "/usr/bin/omxplayer"; QStringList args; args <<"/home/pi/myVideo.mp4"<<"--win"<<"100,100,500,300"; QProcess *omxplayer = new QProcess(); omxplayer->startDetached(prog, args); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButtonPause_clicked() { QString prog = "/root/omxplayer/dbuscontrol.sh"; QStringList args; args << "pause"; QProcess *pause = new QProcess(); pause->startDetached(prog,args); } ~~~
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