Adding QPixmap to QLabel , flickering is happening.

[Pradeep Kumar]

Hi,

I have the buffer, adding it to QPixmap to QLabel for showing images, continously.

m_pixMap.loadFromData(QByteArray((char*)buf,size));
m_pixMap1 = m_pixMap.scaled(label->width(),label->height(),Qt::IgnoreAspectRatio);
label->setPixmap(m_pixMap1);

How can i avoid filckering in QLabel,

Thanks,

[SGaist]

Hi,

What size of image ?
How fast ?
Where do they come from ?

[J.Hilk]

@Pradeep-Kumar said in Adding QPixmap to QLabel , flickering is happening.:

Hi,

I have the buffer, adding it to QPixmap to QLabel for showing images, continously.

m_pixMap.loadFromData(QByteArray((char*)buf,size));
m_pixMap1 = m_pixMap.scaled(label->width(),label->height(),Qt::IgnoreAspectRatio);
label->setPixmap(m_pixMap1);

How can i avoid filckering in QLabel,

Thanks,

If you ignore the aspect ratio than this approach might be more usefull and without error:

label->setScaledContents(true);
label->setPixmap(m_pixMap.loadFromData(QByteArray((char*)buf,size)));

[Pradeep Kumar]

@J-Hilk

I tried adding the

label->setScaledContents(true);
m_pixMap.loadFromData(QByteArray((char*)buf,size));
label->setPixmap(m_pixMap);,

still flickering is happening.

Thanks,

[J.Hilk]

@Pradeep-Kumar ok, we need some more information:
You say, that you change the image continiously, how fast? Maybe iots to fast and the other Images are not painted properly resulting in flickering?

[Pradeep Kumar]

Images are coming from server, 15fps,

Thanks,

[SGaist]

Again: what size are they ?
Also, what format ?

[Pradeep Kumar]

Bitmap format.,
and the size of image depends on the width, height of Widget.

Thanks,

[SGaist]

Are you saying the image data your receive is already the size of your QLabel ?