Drag play window bug

Question

Drag play window bug

samychen opened this issue a year ago · 6 comments

When drag and drop the window, duplicate frames will appear, appearing every time

Answer 1 · 2024-02-18T07:59:28.000Z

The test video resolution is 1080P 59.94fps，Use QAVHWDevice_D3D11 display appearing every time，but cpu render do not appear this bug

Answer 2 · 2024-02-18T13:40:49.000Z

Hi, thanks for contributing! What version of Qt is it?

Answer 3 · 2024-02-18T13:58:00.000Z

Is it seen using ./qml_example ?
Could you please share the file?
btw it is worth to check rendering using QMediaPlayer

QMediaPlayer mp;
mp.setSource(QUrl::fromLocalFile(file));
mp.setAudioOutput(new QAudioOutput); 
mp.setVideoOutput(videoSurface);
mp.play();

Answer 4 · 2024-02-18T14:09:28.000Z

Also as I remember, old Qt QML supports only NV12 format for rendering, means it requires 2 textures, otherwise the renderer will fallback to frame.map(), it will download data from GPU and convert to proper format.

Answer 5 · 2024-02-18T14:26:29.000Z

Your idea looks correct https://github.com/valbok/QtAVPlayer/pull/453/files
but remember in some version of ffmpeg, AV_PIX_FMT_NV12 is returned for AV_HWDEVICE_TYPE_D3D11VA, maybe it is true for only some files ?

Answer 6 · 2024-02-18T14:54:09.000Z

Could you confirm that your files are ok now? after 453. Thanks