Haruna: Performance issues on older and/or less powerful hardware

[Janet Blackquill]

Am Mi., 15. Dez. 2021 um 14:25 Uhr schrieb George Florea Banus
<georgefb899 at gmail.com>:
>
> Hello,
>
> I'm having some problems with playback stuttering
> on older and/or less powerful hardware (Intel i5-4590 3.30GHz, HD
> Graphics 4600),
> while in mpv (and VLC too) it plays smoothly.
> I'm rendering the video in a QOpenGLFramebufferObject
> (https://invent.kde.org/multimedia/haruna/-/blob/master/src/mpvobject.cpp).
>
> I'm thinking the problem could be what Jean-Baptiste Kempf mentions in a
> talk about VLC and Qt.
> The important part starts at 40:36 and ends at 42:30
> https://youtu.be/P1qMAupb2_Y?t=2436
> Basically he says that Qt's rendering loop "doesn't work for video".
> VLC (the new QML version) works around this by having two windows:
> a native window for the video and one for QML and making them act as one.
>
> I would like to avoid that.

Is there a reason why?

> Is there anything I can do to so that the playback is on par with mpv?
>
> ----
>
> Here is a report I made on mpv's issue tracker with more details
> https://github.com/mpv-player/mpv/issues/9417