Hello, I seem to have stumbled on a couple interesting quirks when using Bandicam's HDMI capturing capabilities. Some time ago I had received an Elgato HD60 Pro HDMI capture card, I wasn't able to test it right away considering I lacked an HDMI cord to use at the time, so it wasn't until recent when I finally could after getting access to a cord to use. Upon testing with Bandicam I noticed something strange about the recording window when playing my game consoles, for some strange reason the video feed stutters from time to time spontaneously, regardless of actually recording the game play or not, but here is where it gets really weird, this stuttering problem doesn't impact videos I record at all, watching the recorded videos where the stuttering should appear ends up showing no such things occurring whatsoever. I double checked to see if I was receiving the same stutter problems through my HDMI out connection, I can confirm that this does NOT occur here at all, the video feed is operating the way it should, so this is definitive enough that the video related portions of the HDMI capture card and my cables work as intended and confirms this is a weird issue with Bandicam. I should note that I am NOT using the H264 encoding options for the video feed, I generally use the RGB related options.
Another issue I noticed was with the audio crackling from time to time when using the "use custom audio device" option, in specific I used the "Game Capture HD60 Pro Audio" option that is given to me since obviously the Elgato HD60 Pro can handle audio inputs and outputs through HDMI. This crackle issue isn't apparent at all when using the Elgato capture software, which confirms this also isn't a hardware problem but a software problem in regards to Bandicam. Recorded videos unfortunately do seem to contain the audio crackling when they occur, I was forced to utilize my line-in connection to bypass this issue, which works but isn't ideal for every situation.
The game consoles I tested with were my Nintendo Switch and my Super NES Classic Edition, 1080p and 720p respectively, both run with the intended refresh rate of 60Hz, and considering my display is a 60hz refresh rate monitor, I can't say it's a display issue. I actually have my Elgato HDMI out connected directly to this display, and considering there is no stuttering issues when viewing the game play through the output connection, extra icing on the cake that it isn't my display. It gets kind of hard to navigate in games whenever the stutter issues occur. While I could output to a second display and just watch the game play through that whilst my primary display is busy with displaying the Bandicam stuff, problem is I don't have a secondary display to work with, I'm stuck with just this one display currently, and I would hardly consider this a genuine fix anyways considering this doesn't actually solve the main issues with Bandicam (if it is truly an issue with the software that is, so far everything points to it), it should be possible for people to watch their game play through the recording window without an issue.
System Specifications:
Display: ASUS VE248 (60Hz)
CPU: Intel i7-7700k @ 4.20GHz
GPU: ASUS GTX 1060 6GB
RAM: 16GB DDR4
Capture Card: Elgato HD60 Pro
OS: Windows 10 (64-bit)
Unfortunately I have no way of providing any sort of recording to demonstrate the weird stuttering considering I wasn't able to find a way to screen record Bandicam itself whilst having the HDMI capture window open at the same time. Considering how easy it is to reproduce on my end, it should be reproducible by others who have the same capture card, and quite potentially others in the same brand line, or others in general. Hopefully this is something that can be fixed in some degree in the future.