Wallpaper engine suddenly does not play mp4 backgrounds (Black screen)

[Please]

When i bought the software, all was tippy and good with all forms of backgrounds (1920x1080 and lower) But suddenly a couple days after all files without a "scene" file, don't play anymore. Its just the ones that have .mp4's that do not load anymore.

I got the latest drivers, and i am running windows 10 with all minimum requirements.
Suddenly it just stopped working with those types of backgrounds, havn't updated or installed anything neither during this time.

I tried changing preset quality, hardware acceleration, and switching effects on and off. also tried switching direct x versions. One particular thing tho, the darth vader one didn't work until i changed the FPS. now if i switch it from 24 to 60 again it works fine, dunno whats up with that.

Heres the log
2017-11-21T21:37:12Z: NVAPI init: Error
2017-11-21T21:37:12Z: Failed parsing config.json: File empty.
2017-11-21T21:37:12Z: QDC paths 1, modes 2, query 2, method 0
2017-11-21T21:37:12Z: QDC Monitor path 0. Source name \\.\DISPLAY1, target name \\?\DISPLAY#SAM0659#5&1221df8e&1&UID259#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}, adapter name \\?\PCI#VEN_1002&DEV_689E&SUBSYS_30701682&REV_00#4&2534e90f&0&0010#{5b45201d-f2f2-4f3b-85bb-30ff1f953599}. Source mode 1 / 0, target mode 0
2017-11-21T21:37:12Z: QDC path 0 DISPLAYCONFIG_SOURCE_MODE flags 1 (virtual mode 0, source index 1) position 0 0 width 1920 height 1080 rotation 1
2017-11-21T23:38:08Z: QDC failed: 50
2017-11-21T23:38:08Z: QDC failed.
2017-11-21T23:38:08Z: QDC paths 1, modes 2, query 2, method 0
2017-11-21T23:38:08Z: QDC Monitor path 0. Source name \\.\DISPLAY4, target name \\?\DISPLAY#SAM0659#1&8713bca&0&UID0#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}, adapter name \\?\ROOT#BasicDisplay#0000#{5b45201d-f2f2-4f3b-85bb-30ff1f953599}. Source mode 1 / 0, target mode 0
2017-11-21T23:38:08Z: QDC path 0 DISPLAYCONFIG_SOURCE_MODE flags 1 (virtual mode 0, source index 1) position 0 0 width 1920 height 1080 rotation 1
2017-11-21T23:38:11Z: QDC failed: 50
2017-11-21T23:38:11Z: QDC failed.

[Biohazard]

Do you have a laptop? Then it's likely that the program needs to be set to the integrated GPU in the Radeon/Nvidia control panel. For Nvidia this normally happens automatically when launched through Steam, for AMD I can't do it automatically.

[Please]

Originally posted by Biohazard:

Do you have a laptop? Then it's likely that the program needs to be set to the integrated GPU in the Radeon/Nvidia control panel. For Nvidia this normally happens automatically when launched through Steam, for AMD I can't do it automatically.

Unfortunately i am not using a Laptop to apply this fix. But, instead i am using a Dedicated gpu XFX Radeon 5830HD 1gbvram OC, on a desktop computer. Which has no Integrated GPU.

[Biohazard]

Just to reassure, the 'video' wallpapers don't work anymore, right? Do they still play in WMP (not any other player)?

Some people reported that they had issues with videos after updating to the latest AMD drivers, could it be the same for you? You could try using LAV decoders instead of Windows stock decoders: http://steamcommunity.com/app/431960/discussions/2/1484358860951576217/

[Please]

Originally posted by Biohazard:

Just to reassure, the 'video' wallpapers don't work anymore, right? Do they still play in WMP (not any other player)?

Some people reported that they had issues with videos after updating to the latest AMD drivers, could it be the same for you? You could try using LAV decoders instead of Windows stock decoders: http://steamcommunity.com/app/431960/discussions/2/1484358860951576217/

Hi, thank you very much for these swift replay's developer! These .mp4's did not work in WMP, but did work in "Filmes and tv" widnows default video app. Indeed i downloaded the LAV decoders as suggested, rebooted, and chose the LAV framework in the wallpaper engine general options tab. After switching it to LAV, all i had to do was choose a working "scene" wallpaper, and then revert to a.mp4 video wallpaper. All seems to work now.

Just a side note tho, my gpu is old and uses the legacy drivers which are now unsupported, i do not know if those work with wallpaper engine or not, but, just to say it, i am using a custom modded legacy drivers, to get support for newer features some newer games require. But apparently it had nothing to do with drivers.

Thank you very much @Biohazard !