Hi, I am running the latest Flatpak digikam, which identifies with version 7.0.0-rc in Flatpak, and in Help->About as 7.0.0 with a build date of Sept. 7, 2020. (Not sure why 7.0.0 release or 7.1.0 isn't in flatpak). Anyhow, I have a Pixel 2 XL and a Pixel 4a. Both can capture 4K video with H.264. This video plays back fine in my Debian buster system using VLC. My bideo card is an nVidia GTX 1070. I am using the Nouveau open-source nvidia drivers. When playing on the host system with vlc, vlc comments "Trying to open /usr/lib/x86_64-linux-gnu/dri/nouveau_drv_video.so". This also worked fine on the older version of Digikam included in buster. Since I have upgraded to the digikam flatpak, however, this 4K video cannot play smoothly. There is significant skipping and jumping in the video playback. The nouveau_drv_video.so file used by vlc is in the Debian package mesa-va-drivers. I don't know if a missing nouveau_drv_video.so is the cause of this problem, but it might be a reasonable place to start. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Debian buster (available in About System) KDE Plasma Version: n/a KDE Frameworks Version: 5.73.0 Qt Version: 5.15.0 ADDITIONAL INFORMATION
*** This bug has been marked as a duplicate of bug 382582 ***
You folks are the experts, but just FYI: It's possible that it's a duplicate of #382582, but as Digikam standalone was working fine, I'm less than 100% convinced.
For future travelers: conversation moved to https://github.com/flathub/org.kde.digikam/issues/11 where a workaround has been identified.