DCR has authorized construction to begin on a 0.3-mile extension on the Mass. Central Rail Trail, which will bring the trail across the #Weston-#Waltham city line:
Friends of energy efficiency - the Light Video 0.1.0 #Flathub update is out, build with #gtk4 4.14 and #GStreamer 1.24.1.
This should be the first app targeting the #linux / FDO desktop enabling Wayland video offloading (think zero-copy playback) by default. In many cases (actually more than I expected) this can improve battery lifetime - and on low-end devices even playback performance - significantly.
This is kinda a technology preview in order to see if we can ship features like this enabled by default in a lot more apps in the ecosystem.
Thus I'd be very super happy if you'll try it on lots of hardware - be Intel/AMD laptops or ARM64 devices (with V4L2 stateless decoders, such as most #LinuxMobile devices).
Chances that you really hit a zero-copy path are highest with a recent #Wayland compositor - i.e. if you are using #GNOME46, #kde6 or a recent version of #sway, #weston, #cosmic etc.
As well as only working when nothing is rendered on top of the video, like overlays, subtitles etc. Note that this limitation comes purely from HW/compositors - from the app side it is supported and works quite well on e.g. #weston, which already implements sophisticated hw plane management.
I'm unable to measure this, but I could swear that under Wayland (Weston, KWin) my touchpad mouse cursor movement is delayed by about 1 frame compared to X11 (KWin). It feels like when you enable the software cursor in a game. Does anyone feel the same? 🖱️
For those of you interested in our recent video offloading / zero-copy playback work: I quickly put together some #livi#flatpak s to make it easy to test stuff already. Compositor offloading should work on all semi-recent Intel/AMD and a variety of ARM64 devices.
Things should generally work on #gnome45, #kde6, #sway and #weston - not sure about other compositors.
I haven't tried #kde myself yet as NV12 support was only added recently. But tomorrow there's a local #kde release party where I hope to convince some people to try on their devices.
"As for the other two cases, the county is trying to determine if there is a connection to the school. Perhaps a Manatee Bay student played with another child or a family member. "
After some more debugging, here are two videos proving that #gtk4 / #GStreamer video playback with fullscreen GL/VK overlay works on a #RaspberryPi4 and #PinebookPro / #rk3399 on #weston / #Wayland, each maxing out their video decoders with 1080p@60 and 4k@60 respectively.
The message here is: no matter what hardware - if you want to make a video/camera app that needs to be highly efficient, you can do it with a proper, yet still lightweight toolkit now. No need for a custom kms/drm backend.