我已经设置了服务器和视频流,以便我可以使用以下命令行使用ffplay连接到流:
ffplay rtmp://<IP>/path
是否可以使用QMediaPlayer QMediaContent或其他东西连接到此流?
或者我可以使用ffserver创建任何其他类型的流。
使用与ffplay相同的路径导致&#34;不支持的网址方案!&#34;
通过进一步的实验,我尝试了ffserver http服务器流,但结果是在MFStreamer :: doRead()中的Qt崩溃
显然它应该为MFStreamer调用BeginRead,但它没有。
如何使用QMediaPlayer播放视频流?
编辑:这是我的代码
videotest.cpp
#include "videotest.h"
#include <QVBoxLayout>
#include <QVideoWidget>
#include <qmediaplayer.h>
#include <QMediaContent>
#include <QNetworkAccessManager>
#include <QNetworkReply>
struct VideoTest::Private
{
QMediaPlayer * mediaPlayer;
QNetworkAccessManager * networkAccessManager;
QNetworkReply * reply;
};
VideoTest::VideoTest(QWidget *parent)
: QMainWindow(parent)
{
d = new Private;
d->mediaPlayer = new QMediaPlayer(this, QMediaPlayer::StreamPlayback);
d->networkAccessManager = new QNetworkAccessManager(this);
ui.setupUi(this);
QVideoWidget * videoWidget = new QVideoWidget(ui.centralWidget);
videoWidget->show();
QPalette palette = videoWidget->palette();
palette.setColor(QPalette::Background, QColor(0, 0, 0));
videoWidget->setPalette(palette);
ui.videoLayout->addWidget(videoWidget);
d->mediaPlayer->setVideoOutput(videoWidget);
connect(ui.playButton, SIGNAL(clicked()), d->mediaPlayer, SLOT(play()));
connect(ui.pauseButton, SIGNAL(clicked()), d->mediaPlayer, SLOT(pause()));
connect(ui.videoUrlEdit, SIGNAL(editingFinished()), this, SLOT(sourceChanged()));
connect(d->mediaPlayer, SIGNAL(error()), this, SLOT(stateChanged()));
connect(d->mediaPlayer, SIGNAL(stateChanged), this, SLOT(stateChanged()));
}
VideoTest::~VideoTest()
{
delete d;
}
void VideoTest::sourceChanged()
{
d->reply = d->networkAccessManager->get(QNetworkRequest(ui.videoUrlEdit->text()));
if(d->reply)
{
connect(d->reply, SIGNAL(readyRead()), this, SLOT(networkRequestReady()));
}
}
void VideoTest::stateChanged()
{
QString text = ui.textEdit->toPlainText();
text.append("\n").append(d->mediaPlayer->errorString()).append(" : ").append(d->mediaPlayer->mediaStatus());
ui.textEdit->setText(text);
}
void VideoTest::networkRequestReady()
{
d->mediaPlayer->setMedia(QMediaContent(), d->reply);
}
videotest.h
#ifndef VIDEOTEST_H
#define VIDEOTEST_H
#include <QtWidgets/QMainWindow>
#include "ui_videotest.h"
class VideoTest : public QMainWindow
{
Q_OBJECT
public:
VideoTest(QWidget *parent = 0);
~VideoTest();
public slots:
void sourceChanged();
void stateChanged();
void networkRequestReady();
private:
Ui::VideoTestClass ui;
struct Private;
Private * d;
};
#endif // VIDEOTEST_H
答案 0 :(得分:4)
我找到了一种方法让它发挥作用。
我放弃了Qt。 Qt的人坚持认为它应该可行,但无法生成任何有效的配置。他们说如果从VLC流式传输它应该可以工作,但我没有让它工作。我也尝试了ffmpeg,ffserver和nginx rtmp流媒体。我将这些东西与mplayer,ffplay,VLC和一些甚至与Windows Media Player配合使用,但从未使用过QMediaPlayer。
我尝试将网址提供给setMedia。 我尝试制作一个自定义QIODevice来读取流数据并将该数据提供给使用StreamPlayback初始化的QMediaPlayer,但它只是不会成功读取数据。
最后,我需要的只是播放流,是QWidget而不是GPL许可。
关注these instructions非常简单,但您需要记住将头文件从 vlc-qt / windows / vlc_headers / 2.2 / 复制到 vlc / sdk / include / vlc / plugins (原文如此)。这很重要,如果不这样做,编译过程中可能会出错。请注意,如果您的平台的不同版本与我的版本不匹配,则这些路径可能会有所不同。此外,当您阅读本文时,可能没有必要。
VideoTest.h
#ifndef VIDEOTEST_H_
#define VIDEOTEST_H_
#include <QtWidgets/QMainWindow>
#include "ui_videotest.h"
class VideoTest: public QMainWindow
{
Q_OBJECT
public:
VideoTest(QWidget * p_parent = 0);
~VideoTest();
public slots:
void sourceChanged();
private:
struct Private;
Private * d;
Ui::VideoTestClass ui;
};
#endif
videotest.cpp
#include "videotest.h"
#include <vlc-qt/Common.h>
#include <vlc-qt/Instance.h>
#include <vlc-qt/Media.h>
#include <vlc-qt/MediaPlayer.h>
#include <vlc-qt/WidgetVideo.h>
struct VideoTest::Private
{
VlcInstance * vlcInstance;
VlcMediaPlayer * vlcMediaPlayer;
VlcMedia * vlcMedia;
VlcWidgetVideo * vlcVideoWidget;
};
VideoTest::VideoTest(QWidget * p_parent)
{
d = new Private();
ui.setupUi(this);
d->vlcMedia = 0;
d->vlcInstance = new VlcInstance(VlcCommon::args(), this);
d->vlcMediaPlayer = new VlcMediaPlayer(d->vlcInstance);
d->vlcVideoWidget = new VlcWidgetVideo(this);
d->vlcMediaPlayer->setVideoWidget(d->vlcVideoWidget);
d->vlcVideoWidget->setMediaPlayer(d->vlcMediaPlayer);
ui.videoLayout->addWidget(d->vlcVideoWidget);
connect(ui.playButton, SIGNAL(clicked()), d->vlcMediaPlayer, SLOT(play()));
connect(ui.pauseButton, SIGNAL(clicked()), d->vlcMediaPlayer, SLOT(pause()));
connect(ui.videoUrlEdit, SIGNAL(editingFinished()), this, SLOT(sourceChanged()));
}
VideoTest::~VideoTest()
{
delete d->vlcInstance;
delete d->vlcMediaPlayer;
delete d->vlcMedia;
delete d;
}
VideoTest::sourceChanged()
{
QUrl url(ui.videoUrlEdit->test());
if(url.isValid() == false)
{
return;
}
d->vlcMediaPlayer->stop();
delete d->vlcMedia;
d->vlcMedia = new VlcMedia(url.toString(), d->vlcInstance);
d->vlcMediaPlayer->open(d->vlcMedia);
}
VideoTest.ui
自己制作,我不适合你:D
只需确保它有插入视频小部件的pauseButton,playButton,videoUrlEdit(QLineEdit)和videoLayout。
答案 1 :(得分:0)
我刚刚使用setMedia(QUrl("http://127.0.0.1:8080"));
使用C ++ QMediaPlayer在QML VideoOutput中播放流。
该流是由VLC媒体播放器使用HTTP到8080端口创建的。通过通过setMedia(QMediaContent(), &localFile);
将VLC媒体播放器创建的流传递到QMediaPlayer,我还成功地将其播放到本地文件。