手机网站设计公司,学校网站建设维护,软件开发工程师机构,个人的网站备案多少钱1.简介
有时候#xff0c;windows上开发不满足项目需求#xff0c;需要移植到linux上#xff0c;不得不自行编译libvlc#xff0c;编译libvlc相对而言稍微麻烦一点。
我使用的操作系统#xff1a;Ubuntu20.04
查看系统命令lsb_release -a libvlc版本#xff1a; 3.0.1…1.简介
有时候windows上开发不满足项目需求需要移植到linux上不得不自行编译libvlc编译libvlc相对而言稍微麻烦一点。
我使用的操作系统Ubuntu20.04
查看系统命令lsb_release -a libvlc版本 3.0.18
下载地址GitHub - videolan/vlc at 3.0.18 2.更换源
为了下载一些必要的组件如果没有更换过源的建议还是更新一下源。
先拷贝source.list
cp /etc/apt/sources.list /etc/apt/sources.list.bak
替换源将source.list文件内所有内容删除替换成其他源
#kali官方源deb http://http.kali.org/ moto main non-free contrib
deb-src http://http.kali.org/ moto main non-free contribdeb http://security.kali.org/ moto/updates main contrib non-free
deb-src http://security.kali.org/ moto/updates main contrib non-free#中科大kali源
deb http://mirrors.ustc.edu.cn/kali kali main non-free contrib
deb-src http://mirrors.ustc.edu.cn/kali kali main non-free contrib
deb http://mirrors.ustc.edu.cn/kali-security kali/updates main contrib non-free#新加坡kali源
deb http://mirror.nus.edu.sg/kali/kali/ kali main non-free contrib
deb-src http://mirror.nus.edu.sg/kali/kali/ kali main non-free contrib
deb http://security.kali.org/kali-security kali/updates main contrib non-free
deb http://mirror.nus.edu.sg/kali/kali-security kali/updates main contrib non-free
deb-src http://mirror.nus.edu.sg/kali/kali-security kali/updates main contrib non-free#阿里云kali源
deb http://mirrors.aliyun.com/kali kali-rolling main non-free contrib
deb-src http://mirrors.aliyun.com/kali kali-rolling main non-free contrib#163 Kali源
deb http://mirrors.163.com/debian wheezy main non-free contrib
deb-src http://mirrors.163.com/debian wheezy main non-free contrib
deb http://mirrors.163.com/debian wheezy-proposed-updates main non-free contrib
deb-src http://mirrors.163.com/debian wheezy-proposed-updates main non-free contrib
deb-src http://mirrors.163.com/debian-security wheezy/updates main non-free contrib
deb http://mirrors.163.com/debian-security wheezy/updates main non-free contrib
#auto
deb http://http.kali.org/kali kali-rolling main non-free contrib#中科大
deb http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib
deb-src http://mirrors.ustc.edu.cn/kali kali-rolling main non-free contrib#浙大
deb http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free
deb-src http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free#东软大学
deb http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib
deb-src http://mirrors.neusoft.edu.cn/kali kali-rolling/main non-free contrib#重庆大学
deb http://http.kali.org/kali kali-rolling main non-free contrib
deb-src http://http.kali.org/kali kali-rolling main non-free contrib#官方源
#deb http://http.kali.org/kali kali-rolling main non-free contrib
#deb-src http://http.kali.org/kali kali-rolling main non-free contrib
导入公钥
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7D8D0BF6
更新源
sudo apt-get update
3.编译libVLC
在编译 libVLC 之前你需要确保系统上安装了所有必需的构建工具和库依赖项。打开终端并运行以下命令
sudo apt install build-essential git pkg-config libtool autoconf automake cmake
接下来安装 libVLC 所需的依赖库
sudo apt install libvlc-dev vlc-data libvlccore-dev vlc-bin libavcodec-dev libavformat-dev libswscale-dev
安装好了之后解压源码压缩包并进入源码目录。 执行命令./bootstrap报错如下找不到gettext解决方法sudo apt-get install gettext。 执行命令./bootstrap。报错如下找不到flex解决方法sudo apt-get install flex 执行命令./bootstrap。报错如下找不到bison解决方法sudo apt-get install bison 好了到现在为止基本上是没有问题了生成了可执行文件configure。 接下来需要生成Makefile。
执行./configure。
Lua报错解决方法
sudo apt install liblua5.4-dev
configure: error: Could not find lua. Lua is needed for some interfaces (rc, telnet, http) as well as many other custom scripts. Use --disable-lua to ignore this error.
liba52报错解决方法
这里我直接使用 ./configure --disable-a52
configure: error: Could not find liba52 on your system: you may get it from http://liba52.sf.net/. Alternatively you can use --disable-a52 to disable the a52 plugin.
xcb-composite报错解决方法
sudo apt-get install libxcb-xv0-devsudo apt-get install libxcb-composite0-dev libxcb-glx0-dev libxcb-dri2-0-dev libxcb-xf86dri0-dev libxcb-xinerama0-dev libxcb-render-util0-dev
configure: error: Package xcb-composite, required by virtual:world, not found. Package xcb-randr, required by virtual:world, not found. Package xcb-render, required by virtual:world, not found. Package xcb-shm, required by virtual:world, not found. Package xcb-xkb, required by virtual:world, not found. Pass --disable-xcb to skip X11 support.
xcb-randr报错解决方法
sudo apt-get install libxcb-randr0-dev libxcb-xkb-dev
configure: error: Package ‘xcb-randr’, required by ‘virtual:world’, not found. Package ‘xcb-xkb’, required by ‘virtual:world’, not found. Pass --disable-xcb to skip X11 support.
好了到目前为止如果顺利的话生成了Makefile。 在编译的时候会出现一个问题就是没有.git目录就给我停止掉了这个时候
git clone https://github.com/videolan/vlc.git
这个里面有.git目录将这个目录拷贝到上面的源码目录即可。 最后make -j8 sudo make install
在/usr/local/lib下生成了库头文件在/usr/local/include下。 4.配置编译环境
3rd放libVLC的库showWidget是我的demo程序。 配置.pro文件。
#-------------------------------------------------
#
# Project created by QtCreator 2024-01-16T20:30:05
#
#-------------------------------------------------QT core guigreaterThan(QT_MAJOR_VERSION, 4): QT widgetsTARGET showWidget
TEMPLATE app# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES QT_DEPRECATED_WARNINGS# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES QT_DISABLE_DEPRECATED_BEFORE0x060000 # disables all the APIs deprecated before Qt 6.0.0SOURCES \main.cpp \showWidget.cppHEADERS \showWidget.hFORMS \showWidget.uiRESOURCES \showWidget.qrcLIBPATH ../3rd/libLIBS -lvlccore \-lvlcINCLUDEPATH ../3rd/include源码示例这里采用QLabel来显示视频。
ui界面 #pragma once#include QtWidgets/QWidget
#include ui_showWidget.h
#include QMenu
#include QActionGroup
#include vlc/vlc.h
#include QDebug
#include QFileDialog
#include QThread
#include QMouseEvent
#include QKeyEventenum Rate
{Rate2X,Rate1_5X,Rate1_25X,Rate1_0X,Rate0_75X,Rate0_5X
};class showWidget : public QWidget
{Q_OBJECTpublic:showWidget(QWidget *parent nullptr);~showWidget();public:void updatePic(const QImage image);private slots:void slotOpenFile();void slotPlay();void slotPause();void slotStop();void slotValueChanged(int value);void slotCurrentIndexChanged(int index);private://事件处理回调static void vlcEvents(const libvlc_event_t *ev, void *param);private:Ui::showWidgetClass ui;private:libvlc_instance_t *vlc_base nullptr;libvlc_media_t *vlc_media nullptr;libvlc_media_player_t *vlc_mediaPlayer nullptr;QListfloat m_lstRate;QListQString m_lstAudioDevice;
};#include showWidget.h
#include QTimer
#include QTime
#include QMutex
#include stdlib.h #pragma execution_character_set(utf-8)static showWidget* m_this nullptr;struct Frame
{int width;int height;uchar * pixels;QMutex mutex;
};static Frame *g_frame nullptr;// 自定义视频输出模块的回调函数
static void *lock(void *opaque, void **planes) {g_frame-mutex.lock();*planes g_frame-pixels;return 0;
}//保存100~110帧
static void unlock(void *opaque, void *picture, void *const *planes) {// 这里可以释放视频帧的锁char *buffer (char *)*planes; //planes即为帧数据QImage image((unsigned char*)buffer, g_frame-width, g_frame-height, QImage::Format_ARGB32);m_this-updatePic(image);g_frame-mutex.unlock();
}static void display(void *opaque, void *picture) {// 这里可以进行视频帧的显示或其他处理(void)opaque;
}static unsigned setup(void **opaque, char *chroma,unsigned *width, unsigned *height,unsigned *pitches,unsigned *lines)
{qDebug() chroma: QString(chroma) width: *width , height: *height;/* 开辟存放图像数据的内存块 */if (g_frame){if (g_frame-pixels){delete[] g_frame-pixels;g_frame-pixels NULL;}delete g_frame;g_frame NULL;}int w *width;int h *height;g_frame new Frame;g_frame-pixels new uchar[w * h * 4]; // 申请大小也为4通道的像素memset(g_frame-pixels, 0, w * h * 4);memcpy(chroma, RV32, 4);g_frame-width w;g_frame-height h;*pitches w * 4;*lines h;return 1;
}showWidget::showWidget(QWidget *parent): QWidget(parent)
{ui.setupUi(this);m_this this;this-setWindowTitle(视频播放器);vlc_base libvlc_new(0, NULL);ui.cbxRate-setCurrentIndex(Rate1_0X);m_lstRate 2.0 1.5 1.25 1.0 0.75 0.5;ui.btnOpen-setFocusPolicy(Qt::NoFocus);ui.btnPlay-setFocusPolicy(Qt::NoFocus);ui.btnPause-setFocusPolicy(Qt::NoFocus);ui.btnStop-setFocusPolicy(Qt::NoFocus);ui.hSliderVolumn-setFocusPolicy(Qt::NoFocus);ui.cbxRate-setFocusPolicy(Qt::NoFocus);connect(ui.btnOpen, QPushButton::clicked, this, showWidget::slotOpenFile);connect(ui.btnPlay, QPushButton::clicked, this, showWidget::slotPlay);connect(ui.btnPause, QPushButton::clicked, this, showWidget::slotPause);connect(ui.btnStop, QPushButton::clicked, this, showWidget::slotStop);connect(ui.hSliderVolumn, QSlider::valueChanged, this, showWidget::slotValueChanged);connect(ui.cbxRate,SIGNAL(currentIndexChanged(int)), this, SLOT(slotCurrentIndexChanged(int)));
}showWidget::~showWidget()
{libvlc_release(vlc_base); //减少libvlc实例的引用计数并销毁
}void showWidget::updatePic(const QImage image)
{ui.lbImage-setPixmap(QPixmap::fromImage(image));
}void showWidget::slotOpenFile()
{/*选择文件*/QString filename QFileDialog::getOpenFileName(this, 选择打开的文件, D:/, tr(*.*));vlc_media libvlc_media_new_path(vlc_base, filename.toUtf8().data());if (!vlc_media) {return;}// 创建libvlc实例和媒体播放器vlc_mediaPlayer libvlc_media_player_new_from_media(vlc_media);if (!vlc_mediaPlayer) {return;}libvlc_video_set_format_callbacks(vlc_mediaPlayer, setup, NULL);// 设置自定义视频输出libvlc_video_set_callbacks(vlc_mediaPlayer, lock, unlock, display, NULL);// 等待元数据加载完成libvlc_media_parse(vlc_media);// 获取各种元数据const char *title libvlc_media_get_meta(vlc_media, libvlc_meta_Title);const char *artist libvlc_media_get_meta(vlc_media, libvlc_meta_Artist);const char *album libvlc_media_get_meta(vlc_media, libvlc_meta_Album);const char *url libvlc_media_get_meta(vlc_media, libvlc_meta_URL);const char *date libvlc_media_get_meta(vlc_media, libvlc_meta_Date);const char *lang libvlc_media_get_meta(vlc_media, libvlc_meta_Language);int duration libvlc_media_get_duration(vlc_media); // 获取时长单位毫秒qDebug(Title: %s, title ? title : N/A);qDebug(Artist: %s, artist ? artist : N/A);qDebug(Album: %s, album ? album : N/A);qDebug(Duration: %d ms, duration);qDebug(url: %s, url ? url : N/A);qDebug(date: %s, date ? date : N/A);qDebug(lang: %s, lang ? lang : N/A);libvlc_media_track_t **tracks;int track_count libvlc_media_tracks_get(vlc_media,tracks);for (unsigned i 0; i track_count; i) {libvlc_media_track_t* track tracks[i];// 显示轨道信息printf(Track #%u: %s\n, i, track-psz_description);// 这里可以获取到每一个轨道的信息比如轨道类型 track-i_type// 可能是 libvlc_track_video, libvlc_track_audio 或者 libvlc_track_text (字幕)if (track-i_type libvlc_track_video) {// 处理视频轨道信息qDebug(width %d,track-video-i_width);qDebug(height %d, track-video-i_height);qDebug(rate_num %d, track-video-i_frame_rate_num);qDebug(rate_den %d, track-video-i_frame_rate_den);}else if (track-i_type libvlc_track_audio) {// 处理音频轨道信息qDebug(channels %d, track-audio-i_channels);qDebug(rate %d, track-audio-i_rate);}else if (track-i_type libvlc_track_text) {// 处理字幕轨道信息}}//获取事件管理器libvlc_event_manager_t *em libvlc_media_player_event_manager(vlc_mediaPlayer);// 注册事件监听器libvlc_event_attach(em, libvlc_MediaPlayerTimeChanged, vlcEvents, this);libvlc_event_attach(em, libvlc_MediaPlayerEndReached, vlcEvents, this);libvlc_event_attach(em, libvlc_MediaPlayerStopped, vlcEvents, this);libvlc_event_attach(em, libvlc_MediaPlayerPlaying, vlcEvents, this);libvlc_event_attach(em, libvlc_MediaPlayerPaused, vlcEvents, this);QTimer::singleShot(1000, this, showWidget::slotPlay);libvlc_video_filter_list_get(vlc_base);
}void showWidget::slotPlay()
{if (vlc_mediaPlayer){libvlc_media_player_play(vlc_mediaPlayer);}
}void showWidget::slotPause()
{if (vlc_mediaPlayer)libvlc_media_player_pause(vlc_mediaPlayer);
}void showWidget::slotStop()
{if (vlc_mediaPlayer)libvlc_media_player_stop(vlc_mediaPlayer);
}void showWidget::slotValueChanged(int value)
{if (vlc_mediaPlayer)libvlc_audio_set_volume(vlc_mediaPlayer, value);
}void showWidget::slotCurrentIndexChanged(int index)
{if (vlc_mediaPlayer)libvlc_media_player_set_rate(vlc_mediaPlayer, m_lstRate[index]);
}//事件回调
void showWidget::vlcEvents(const libvlc_event_t *ev, void *param)
{showWidget *w (showWidget*)param;//处理不同的事件switch (ev-type) {case libvlc_MediaPlayerTimeChanged:{//qDebug() VLC媒体播放器时间已更改;qint64 len libvlc_media_player_get_time(w-vlc_mediaPlayer);libvlc_time_t lenSec len / 1000;libvlc_time_t totalLen libvlc_media_player_get_length(w-vlc_mediaPlayer);libvlc_time_t totalLenSec totalLen / 1000;int thh, tmm, tss;thh lenSec / 3600;tmm (lenSec % 3600) / 60;tss (lenSec % 60);QTime time(thh, tmm, tss);w-ui.lbCurTime-setText(time.toString(hh:mm:ss));thh totalLenSec / 3600;tmm (totalLenSec % 3600) / 60;tss (totalLenSec % 60);QTime TotalTime(thh, tmm, tss);w-ui.lbTotalTime-setText(TotalTime.toString(hh:mm:ss));double pos (double)lenSec / totalLenSec * 100;w-ui.horizontalSlider-setValue(pos);}break;case libvlc_MediaPlayerEndReached:qDebug() VLC播放完毕.;break;case libvlc_MediaPlayerStopped:qDebug() VLC停止播放;break;case libvlc_MediaPlayerPlaying:qDebug() VLC开始播放;break;case libvlc_MediaPlayerPaused:qDebug() VLC暂停播放;break;}
}5.运行
VLC 和 libVLC 使用环境变量 VLC_PLUGIN_PATH来查找其插件。你可以在运行应用程序之前设置此环境变量以指定插件目录的位置。
必须配置插件的环境变量否则运行不了插件在/usr/local/lib/vlc下。
export VLC_PLUGIN_PATH/home/zz/plugins
运行效果 6.更多参考
QtFFmpegopengl从零制作视频播放器-1.项目介绍_qt opengl视频播放器-CSDN博客
libVLC 提取视频帧使用OpenGL渲染-CSDN博客
QT UDP通信单播、广播、组播-CSDN博客
QCharts -1.概述-CSDN博客
libVLC 视频界面分割-CSDN博客
