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

[George Florea Banus]

Sorry, I messed up and didn't reply to the mailing list.

On 15.12.2021 22:26, Janet Blackquill wrote:
> 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?

I feel like it would complicate things a lot. Resizing, moving and also 
stacking them so they behave like one window.

>> 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