Likwid

You already get all that is available on TV, I have 8k60/4k144hz tv and all the options work, everything is available. Couple years ago I looked for tht kind of adapter for a friend and result was, no HDR, no VRR, but he didn't have to upgrade GPu

I have intel i5 6500 with gt 1030 for my family members office pc to run 4k60fps with no problems. I'll upgrade my tv next week so they are getting my old tv 8k60/ 4k144hz, but will be limited to 4k60 due to GPU. Can post feedback after a week if interested. Any particular reason to go for 4k120?

Eu, Latvia RTX 5090 from 2400 eur to 3200 eur in two weeks after new year

I had to remove my GPU for ram training to even work otherwise it would not start and system would be stuck at back screen, took me couple of hours to even try that

Just make sure you test every step, maybe check different format in convertion, maybe different bitrate. Good luck in your search, for me gstreamer has always performed better and resulted in lower latency almost all the time. Edit: I once created custom video decoding pipeline for low latency video display and oh boy ffmpeg learning curve is quite high. Now I'm sticking with gstreamer and ability to pass pipeline as a string such a nice feature, if your command will work in commandline, it will work in c code.

Can you check with different audio files? My guess would be that read_audio_file_header reads header, but is not valid or is corruped while still giving somewhat "valid" header that doesn't match audio contents. Other idea would be - if youare using hardware acceleration that when you retrieve frame it can be in nonstandart format like for video when decoing on nvidia hardware you would get nv12 or nv** format out and would get same error, to resolve it in nvidia case you would do another convertion to rgb, but to my knowledge this is only for image data, no idea for audio. Try to add more brake points and check if first avframe passed matches gussed info.

There should be built in error to human redable string converter, atleast then you would know where to start searching. For you AVERROR_OUTPUT_CHANGED = -1668179714 I would check if input and output formats doesn't change i.e you pass reference with one parameters but it doesn't match ones going in or out

When you had previous issue what hdmi lenght and version were you using. For me changing color depth resosolved black screens for tv. Also quality cables help. My pc is 5m away from tv and only canble that helped to get black screens down was club3d hdmi cable, but changing color depth to 8 bit resolved issue fully. Had same issue with my 6900xt and got black screens again when did DDU and instaleed 9700xt, changing color depth to 8 bit again resolved everythin. You could also check if there is enchanced color enabled (this resolved issue with my older tv which i had 2-3 years ago when using 4k60, my current tv runs game mode 4k120hz all the time now)

I Upgraded from rabdom rx 6900 xt to sapphire rx9070 xt in result. Previusly I got around 120-140 fps in warthunder 4k, fans at 3000rpm, 90c and 320w power consumption and with new gpu got 50-80% more fps. If I enable vsync, i gethalf the power consumption and card is whisper quiet with same fps as before.

Change color depth fron 12 or 10 bit to 8bit. No visual difference but black screens will stop

If it's the same resolution it should have same cable. Couple of years ago when I was searching for laptop display mosy models had onky two types of connectors, one for 4k other for 1080p.

Did you order same resolution display as the previous one? I think 1080p and 4k panels have different cables, and you can't swap them

Check out https://www.youtube.com/@monitorsunboxed there are some really good mini-led monitors, but they are around 600$, but check out reviews, haven't checked in last year if there is anything new

Have you tried factory resetting router and setting it up again?

Enable HDR in windows, do HDR calibration, play HDR supported game, enable it in-game, after exiting game disable HDR again. When using windows for anything other than gaming and watching movies just disable HDR. P.S. I have disabled HDR and 10% of my total time I spend playing games doesn't justify me changing windows settings all the time.