Variable Frame Rate Hardware specific Audio Sync issues

[salvord84842672]

Hi Everyone, 

I have a particularly interesting problem at hand since I switched from my old PC (Amd Ryzen 5 1600, GTX 1060) to a newly build machine with an I7 14700k, and a RX7800xt. I am a professionel video editor, and I know about the problems VRF brings for NLES, but: I worked with the same people shooting their footage on IPhone for years. Never had a noticable audio sync problem.  Since switching though, when I import a clip, the clap seems to be visually 3-4 Frames offset from the audio. When I transcode to CFR with Handbrake the problem resolves. The same project, same sequence and same clip are in sync on every other machine I have tried though (2 Mac Books, my old PC, one Dell Windows Laptop) I am going crazy. Batch decoding every clip I use for shorter format content seems so over extensive, especially regarding the fact that I cant seem to recreate the issue on any other machine. Notable here is that I also switched from Windows 10 to 11, but I kinda cant imagine that being the issue. Does anyone have an idea why my machine just has a unique Problem with VRF shot Iphone footage? Its driving me insane, something looking utterly out of sync in Waveform/Picture, then opening it on another machine and being completely fine. Anyone encountered this yet and can help? I would be much obliged, already thinking abt resetting to windows 10, never had these problems in my 5 years before working with the same footage.

[salvord84842672]

Another addition: When I export a timeline without re-encoded VRF clips to a CFR H.264 Mp4 from premiere, the sync issue prevails, also in the exported clip if reimported. If i export the same project on the same version of premiere from any other machine I have access to,  there is no sync issue at all, clap and clap sound are matched to the fullest, In export the same as in timeline preview of video and waveform. Is there reknown issues for Hardware that I listed from my new PC? is it windows 11? I work collaboratively on these projects, and one party being able to watch and render withot sync issues, while everything I render (Even if i deactivate Hardware Accell) is utterly offsync.

[salvord84842672]

DaVinci manages, maybe its time to dump Adobe at this point

[MyerPj]

I'm not having those issues on Windows 11, it's been working fine since early 2022 when I built this rig. Personally I would have stuck to nvidia as in general it seems to work better with PP and having cuda cores which PP specifically supports. Maybe try your 1060. I was using my GTX 1070 on this build/upgrade until early 2023 when I finally upgraded to a 4070.

[salvord84842672]

Gonna DDU and put the 1060 in tmrw to see if it changes anything, If that would be the case, than I would be very annoyed at my self, as I had the decision between 4070 super and rx7800xt, and took the rx bc uf pudgetbench, and a 120€ lower price. Kinda unsure if thats where the problem stems from though, many people on here complain about stuff with VFR being weird. You were/are also working with Filmic Pro shot Iphone clips in 50 frames VFR, on an intel cpu, on your rig and didnt experience this weird behaviour? 

Thanks for the answer, best regards

[MyerPj]

That's a free test, since you have the card at hand. Let us know.

If you have a problem clip you can put on google drive or such, I'd be happy to give it a test.