I'm using Bandicam 1.8.5 on a 64-bit Windows 7 machine with the following specs:

i7 3930k @ 4.7 GHz
32 GB RAM with the clock speed(in Mhz) to CAS ratio somewhere around 220
4GB gtx680 classified

recording to a 3TB hard drive that averages 100-110 MB/sec sequential write speed.

I usually have no issues recording 1920 x 1080 @ 30 fps using the Lagarith codec, but for some reason I'm having a syncing issue when trying to record PCSX2, the PS2 emulator. I'm talking about synchronization between the capture of frames and the emulator, not audio/video sync.

When i attempt to record PS2 gameplay, what happens seems to be a timing/syncing issue. I will have a fluid 30fps for 20 seconds, and then 15 fps for 20 seconds, then 30fps for 20 seconds, and so forth.

Now just to clarify, when I say 15 fps, I don't mean that there are only 15 frames that Bandicam captured within the period of one second. What actually happens is every 2 frames that it captures are identical. So it gives the illusion of 15 fps. In other words, out of the 30 frames captured in one second, frame 1 and 2 are identical, frame 3 and 4 are identical, and so forth.

Now since it's periodic in nature, I assumed (and am still assuming) that it is a timing issue. NTSC games run at 59.94 fps, so I was thinking maybe this slight fps difference could cause this issue. So I tried taking off the frame limiter in PCSX2 (it goes up to around 250 fps) applying a limiter in bandicam to 60 fps, and recording at 30 so that bandicam was managing the frame rate itself. This way instead of the game running at 59.94 fps, it would run at 60.00 fps, an integer multiple 30 fps, my capture rate, thus illiminating this issue.

This did not solve the issue. I even tried setting the fps limit and capture rates to low values, like 30 fps for the limiter, and 15 fps for the capture rate. This still did not work.

If anyone can explain to me why this is happening or how to fix it, it would be greatly appreciated, because if i can't resolve this issue, I will be forced to use the internal recorder within PCSX2 which while producing perfectly fluid video, is a bit of a pain to work with.