
Seeking Advice to Reduce Artifacting Near Edges
I've starting using AV1 recently since learning about the SVT-AV1-HDR fork (I was very unimpressed with mainline SVT). I've generally been getting better results than HEVC with this fork. I'm currently trying to encode a high quality 4K HDR video to 1080p to save space. For grainy videos, I generally aim for 10-15Mbps with HEVC. I haven't done that many encodes with AV1 yet, but I've seen similar or better quality at 8-12Mbps with the few that I've done. On this one that I'm working on right now, It looks really good at 10Mbps except that I'm seeing artifacts on some of the edges. Particularly edges that move slowly across a grainy background. In the attached picture, it's kinda hard to see the artifacts, but it's more obvious when the video is going because there's no grain moving in that area and it follows the character as they move like it's attached. Normally I would just increase the bitrate until I can't see it anymore, but in this case even doubling the bitrate to 20Mbps doesn't fix it which is a pretty high bitrate for 1080p AV1/HEVC.
I'm using SVT-AV1-HDR 10bit, tune:grain, preset 4-2, ABR. I'm not interested in using grain synthesis or anything that's going to remove the original grain. If anyone knows any relevant settings that can help with this, please let me know.