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Properly set desktop capture region

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We now capture the full screen by default, with code to handle modesetting, instead of always the FFmpeg default region of 1024x768
This commit is contained in:
tux3 2015-06-02 00:34:38 +02:00
parent bc946308c8
commit 37a3a8d9d6
1 changed files with 26 additions and 4 deletions
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30
src/video/cameradevice.cpp
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@ -1,4 +1,6 @@
#include <QDebug>
#include <QApplication>
#include <QDesktopWidget>
extern "C" {
#include <libavformat/avformat.h>
#include <libavdevice/avdevice.h>
@ -61,7 +63,8 @@ out:
CameraDevice* CameraDevice::open(QString devName)
{
return open(devName, nullptr);
VideoMode mode{};
return open(devName, mode);
}
CameraDevice* CameraDevice::open(QString devName, VideoMode mode)
@ -71,21 +74,40 @@ CameraDevice* CameraDevice::open(QString devName, VideoMode mode)
AVDictionary* options = nullptr;
if (false);
#ifdef Q_OS_LINUX
else if (devName.startsWith("x11grab#"))
{
QSize screen;
if (mode)
{
screen.setWidth(mode.width);
screen.setHeight(mode.height);
}
else
{
screen = QApplication::desktop()->screenGeometry().size();
// Workaround https://trac.ffmpeg.org/ticket/4574 by choping 1 px bottom and right
screen.setWidth(screen.width()-1);
screen.setHeight(screen.height()-1);
}
av_dict_set(&options, "video_size", QString("%1x%2").arg(screen.width()).arg(screen.height()).toStdString().c_str(), 0);
}
#endif
#ifdef Q_OS_WIN
else if (iformat->name == QString("dshow"))
else if (iformat->name == QString("dshow") && mode)
{
av_dict_set(&options, "video_size", QString("%1x%2").arg(mode.width).arg(mode.height).toStdString().c_str(), 0);
av_dict_set(&options, "framerate", QString().setNum(mode.FPS).toStdString().c_str(), 0);
}
#endif
#ifdef Q_OS_LINUX
else if (iformat->name == QString("video4linux2,v4l2"))
else if (iformat->name == QString("video4linux2,v4l2") && mode)
{
av_dict_set(&options, "video_size", QString("%1x%2").arg(mode.width).arg(mode.height).toStdString().c_str(), 0);
av_dict_set(&options, "framerate", QString().setNum(mode.FPS).toStdString().c_str(), 0);
}
#endif
else
else if (mode)
{
qWarning() << "Video mode-setting not implemented for input "<<iformat->name;
(void)mode;