The VideoLAN Forums

Thank you. I integrated VLC4 using discussed callbacks into my application. It works almost as expected. But now I have a different issue: sometimes the application crashes when I try to stop playback with libvlc_media_player_stop_async which is called from Qt's slot on button clicked. There is some...

On which EGL implementation are you trying to do that? It should work correctly on Linux MESA and ANGLE/Native Windows implementations. Qt currently **requires** this behaviour to load its own API, so there shouldn't be an issue with this, and the correct entrypoint seems to be returned. However, w...

Thank you.
I got it.
Now I need to figure out how to make it working...

I agree. Garbage value is not allowed. This is not my code. It is from Vlc's git, please check a link: https://code.videolan.org/videolan/vlc/-/blob/master/doc/libvlc/QtGL/qtvlcwidget.cpp#L158 "eglQueryString" pointer is provided by getProcAddress method of the instance of QOpenGLContext c...

Means you've returned garbage from GetProcAddress No. I was debugging a bit. There (vlc/modules/video_output/opengl/interop_vaapi.c): priv->egl.queryString = vlc_gl_GetProcAddress(interop->gl, "eglQueryString"); if (priv->egl.queryString == NULL) goto error; /* EGL_EXT_image_dma_buf_impor...

1. Is this the correct path to follow? That is, will libvlc_video_set_output_callbacks() from VLCv4.0 potentially solve our problem? Yes. 2. If correct, where can we find examples of how to use libvlc_video_set_output_callbacks()? https://code.videolan.org/videolan/vlc/-/blob/master/doc/libvlc/QtGL...