Hi
@sp0457
UI3's seeking (while you are actively holding down the mouse button and dragging the seek bar) is not done with H.264 since there's no API available to do that properly. While you seek, every frame is a jpeg snapshot.
If you were using a Jpeg streaming profile, I think it would use that profile to determine the quality to use for seeking.
But when you have an H.264 profile selected, UI3 does it differently. If I recall, the quality of those frames while seeking is dependent on the average bit rate that was achieved during the last few seconds of H.264 video streaming. The idea was, if the bit rate was very high, then the user is probably on a fast connection so getting large jpeg images won't be too laggy. But if the bit rate was very low, that indicates there might not be much bandwidth available so UI3 would try to use a very low quality for those jpeg images whiel seeking.
It may be time to adjust the logic that decides the quality. Or maybe I just need to add a "seeking quality" field to the streaming profile configuration, and not have it try to choose the quality dynamically anymore.
You already turned off the Seek with Sub Stream setting. That is good. The only other thing you can control at this time is to choose a higher quality streaming profile like "2160p" as this should in most cases result in a high enough video bit rate that the jpegs look good. Are you not seeing that behavior on your system? Do note that the "VBR" profiles typically function with a very low bit rate and this may adversely affect the quality that is used while seeking. But the profiles without "VBR" in the name have higher quality settings which typically yield a much larger bit rate, and therefore higher quality seeking.