How to fix a/v desync NUCLEAR OPTIONS?

[rexendevar]

Hi, I have a 4k video and a potato laptop and I do not want to reencode the whole thing before I watch it. I want the audio in sync with the video and frankly I don't gve aa shit what the framerate of the video actually is. I want MPV to drop frames until it syncs up. Currently the options I'm using are --profile=fast --video-sync=display-resample --framedrop=decoder+vo --vd-lavc-skiploopfilter=all --vd-lavc-skipidct=all --vd-lavc-skipframe=nonref and it's dropping a LOT of frames but still not actually keeping up with the audio. Actually the output subjectively looks identical to what it's like without ANY of those flags. What options are evn left?

[dancingmirrors]

--hwdec is probably the most important thing you didn't mention and what I'd try first.

[rexendevar]

My IGPU didn't know the codec

[dancingmirrors]

--sws-fast --sws-scaler=fast-bilinear, but not sure how zimg interacts with these. Maybe something like additionally --vf=scale=1280:-2 could help for weird reasons. You didn't mention the codec but you could also be experiencing some bug with it. I'm pretty sure --video-sync=display-resample is not actually what you want but rather --video-sync=display-vdrop should actually try to drop frames aggressively. How potato is potato? My laptop is almost 14 and I can almost play 4k videos normally without hardware acceleration.