REF: I believe this is related to a prior thread, but is a different topic:
Project Setup/Background:
- Vegas Version: Latest V22 build
- Project is 1080p60
- Media: Most media is 1080p60. My wide cam is 4Kp30
- Render Format: Magix AVC 1080p59.94
- Setting we'll be discussing: File I/O "Use Legacy AVC Decoder"
- Add-in discussed: Neat Video v6.5
Observed Problem:
NEAT is applied to some of the 4K wide events, to the LEFT of Pan/Crop. I'm using a saved profile that was sampled while using a project that was set to 4K on that same camera media.
- During playback, sometimes the preview window shrinks the image to 1/4 of the preview display, top-left corner, then it jumps back to properly fill the preview.
- When rendering, that 4K wide event is rendering filling only the top-left 1/4 of the output (2nd image above)
Troubleshooting and Finding!!
I changed various Vegas and Neat settings to reproduce and eliminate this problem. In the process, I found something very interesting that may reveal an underlying problem with the newer Vegas Decoder... read on!
- The following made no difference (same results)
- Changing Render profile (using AMD or not)
- Changing the selected Hardware Decoder (RX470 or Intel 630)
- Changing Neat Video to only use CPU vs CPU+GPU
- The following resulted in correct render:
- Disabling Neat Video on that event
- --> Enabling Legacy AVC Decoding
Enabling Legacy AVC Decoding fixed this problem.
I then noticed something else that I believe is related to the thread mentioned at the top. I think this is significant.
- When Legacy AVC Decoding is checked -- Looking at the "General" info in Neat, it properly shows the event is 4K
- When Legacy AVC Decoding is UNchecked -- Looking at the "General" info in Neat, it incorrectly shows the event at 1080p
It seems something about the new decoder is incorrectly handling the 4K event as it passes it (or info about it) to Neat Video.
I suspect this is the root cause of the problem here.
Thoughts?