Video playback with hardware acceleration

[jojuma]

Hello...!

Shortly I read about 'Clapper' which plays back videos using hardware acceleration on the PinePhone, at least if the video's codec is H.264. I have a video file, whose codec is H.264 but the screen simply stays black, it doesn't even start.
On Youtube I saw a demonstration of Clapper with a demo video (screenshots of this video are on the flathub site linked above). Can someone point me to this demo video or another video that works so I can take a look at the specs. I'd like to encode some videos with Handbrake according to those specs.

Thanks for any hint!

[Merc]

I've gotten this to work by reading these two pages:

Hardware Accelerated Video Decoding on the PinePhone
Hardware Accelerated Video Decoding on the PinePhone with Clapper

Your problem is likely from not compiling the latest gstreamer.

[jojuma]

Thank you for those hints.
It took me some days to try that, but it won't work for me.

I did everything like described in the first link. If I try to run the video, I get

Code:

ERROR Driver did not accept the bitstream parameters. for file...

So I didn't even try with the GUI. What could I do about that?