VideoOutput with custom source

[Maksim Kuk]

Hellow!
Try to create custom video provider to stream v4l2 video to qml. I hve Implemented VideoProvider class derived from QObject like in doc (https://doc.qt.io/qt-5/videooverview.html#working-with-low-level-video-frames) but VideoOutput is always black.

With MediaPlayer it works well.

Add QAbstractFilter to check frames on videoOutput - it receives proper data but creen is black.

Frames for present() created with

int bytesPerLine = m_capture->width() * 2; // 2 bytes per pixel
int bufferSize = m_capture->height() * bytesPerLine;
QSize frameSize(m_capture->width(), m_capture->height());
QVideoFrame::PixelFormat format = QVideoFrame::Format_UYVY;
QVideoFrame *frame = new QVideoFrame(bufferSize, frameSize, bytesPerLine, format);

Surface started on setVideoSurface()

m_format = QVideoSurfaceFormat(frameSize, format);
m_surface->start(m_format);

What am I missed? How can I debug it?

qt 5.7 on imx6

[SGaist]

Hi and welcome to devnet,

I am not sure that UYVY support was 100% supported for displaying like that by that old version of Qt.