Encoder glitches / digital artifacts on clips transitions

weinerschizel wrote on 12/16/2022, 8:30 PM

I had started noticing this lately. The encoder is doing weird things when I transition form one clip to another. Glitches in Video

3m:48s Sony a6400 AVC 29.97fps100mbit AVC to DJI Mini 2 Drone 29.97fps AVC (100mbit?)
12m:58s in clip NOTE GoPro 10 Black 29.97fps HVEC to still image

Vegas Pro 20 Build 214 w/Nvidia 2080 Ti Studio Driver 527.56 and no secondary GPU

I just upgraded to the Nvidia 2080, was having some similar difficulties with my old Radeon 480 Card too. However, was able to tweak timeline on those projects with old card to get rid of all the frame glitches. Timeline playback doesn't have any glitches, only the rendered file.

I suspect it is something with my render settings the system doesn't like. However, I fiddled with that too and have yet to find an optimal AVC render setting / encoder. Here's what I've been using...

Any ideas what's causing this artifacting or how I might fix it?

I also tried rendering to HVEC with my old 480 card and was nothing but a glitchy mess on many of the clip transitions so I just stuck with AVC but still encounter these encoder glitches.

UPDATE: Very annoying but... Fiddling around with render settings. The glitches go away when I render with the CPU. See below, this means renders take MUCH longer so I'd really like to figure out why the Nvida (and formerly Radeon) encoders glitch like that on my machine.

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wwaag wrote on 1/29/2023, 1:18 PM

@weinerschizel

I copied the project to my laptop (see signature) and rendered both glitch areas using the Magix AVC/AAC MP4 renderer and UHD 2160p 29.97 fps(Intel QSV) template. Both rendered perfectly--no glitches. The dynamic RAM on my laptop was set to 2579MB.

weinerschizel wrote on 1/29/2023, 2:41 PM

Thanks @wwaag for rendering the project. At this point, I am thinking the issue is with usage of GPU encoders for NVIDA and AMD in the Magix render routines. It sounds like the issue may not be recreated with an Intel GPU.

weinerschizel wrote on 2/15/2023, 6:16 PM

Update: I completely reinstalled my PC system... Couldn't ghost the old m.2 main drive so I just reinstalled everything when I upgraded to Samsung 980pro 1TB m.2

Vegas is running better in some regards now. However, It still produces those same glitches, the original render issue persists.

I've also been trying my best to communicate with Vegas support. They've never replied to me since sending them the link for the sample project. I don't know if my email is being filtered out by SPAM stuff or what 😧

weinerschizel wrote on 3/28/2023, 1:23 PM

Eric and Magix got back with me. They were able to recreate this issue with the sample project I provided and they are working to resolve it. I think they may have addressed some of it in the 370 build as I didn't have the issue w/ h.264 to h.265 transmissions, although still images didn't render correctly.

Eric says they are working the bug :)