I have attempted to replicate the code pattern you suggest When I call `i_recorder.record()`, it returns immediately, without calling either of my slots (audio or video).
Do you have a fully working example project, that is zipped up and ready to “unzip and run” ? -Dave > On Jun 21, 2024, at 4:52 AM, Volker Hilsheimer <volker.hilshei...@qt.io> > wrote: > >> On 19 Jun 2024, at 20:14, David M. Cotter <d...@kjams.com> wrote: >> >> If i have a QGraphicsScene (not necessarily connected to a view, or if >> required, an OFFSCREEN view), can i set its output as the input to a >> QMediaCaptureSession? >> I see i can connect a QWindowCapture, but must that window be showing? can >> that window be invisible? eg: h.264 output in the background, unrelated to >> the showing (visible) windows? >> I had asked this question a couple years ago, but times have changed and i >> wonder if it is now possible? >> if it is not possible from QGraphicsScene directly, then how about a >> temporary buffer of QImage? Can i feed QMediaCaptureSession a QImageCapture >> class, then feed the QImageCapture class a series of QImage or QVideoFrame >> refs? >> is there sample code for sending in-memory images into QMediaCaptureSession ? >> >> -Dave > > > Hi Dave, > > Forwarding Artem’s reply (which went to development@): > > > Thanks for the questions! > > In 6.8, we added QVideoFramesInput, and QAudioBufferInput, which can be > connected toQMediaCaptureSession as inputs. > Let's go through the questions. > >> If i have a QGraphicsScene (not necessarily connected to a view, or if >> required, an OFFSCREEN view), can i set its output as the input to a >> QMediaCaptureSession? > > You cannot set QGraphicsScene as an input to QMediaCaptureSession. Instead, > you may render QGraphicsScene to QImage, construct QVideoFrame from the > image, and send your sequence of images to QVideoFrameInput, connected to > QMediaCaptureSession. > > >> I see i can connect a QWindowCapture, but must that window be showing? can >> that window be invisible? eg: h.264 output in the background, unrelated to >> the showing (visible) windows? > > It’s platform-dependent. E.g. on Windows, we cannot capture invisible > windows. On other platforms, it’s to be double-checked and documented, the > ticket is https://bugreports.qt.io/browse/QTBUG-126552. > In general, the result of QWindowCapture::capturableWindows is designed to > represent the windows we can capture. If the list contains an invisible > window that QtMM cannot capture, a ticket might be reported. > > >> if it is not possible from QGraphicsScene directly, then how about a >> temporary buffer of QImage? Can i feed QMediaCaptureSession a QImageCapture >> class, then feed the QImageCapture class a series of QImage or QVideoFrame >> refs? > > QImageCapture is rather an output for capturing image shots from cameras, > screens, windows, so it doesn’t cover your needs. Please use > QVideoFrameInput. In 6.8, you may create video frames from QImage or from > your custom data via QAbstractVideoBuffer, see the constructors of > QVideoFrame. > > >> is there sample code for sending in-memory images into QMediaCaptureSession ? > > > There are no code samples in the public documentation yet. We have a ticket > for writing them:https://bugreports.qt.io/browse/QTBUG-126319. > Until we add the snippets or examples, you may take a look at the tests: > An early tests revision with a straight-forward flow. > The current tests revision is a bit harder to learn from. > > > > Regards > Artem > > _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
