VHS Capture - enabling Yadif 2x Deinterlacing causing dropped frames

[CaseyStelken]

Hey gang. I'm digitizing VHS tapes played on a JVC VCR through Elgato Video Capture via OBS 30.1.2 on Windows 10 Home.

I've noticed that enabling Yadif 2x deinterlacing, I see a lot of dropped frames, resulting in "stuttering" video, especially when a camera is panning left-to-right.

Here is a sample video showing a short clip with deinterlacing off, and then with deinterlacing on... it repeats both examples once more for your convenience:

I've read all sorts of other posts about this issue and have tried lots of adjustments, but no luck.

Also of note - it's not always consistent. On occasion, one of the camera pans that you see in the video sample are BUTTERY SMOOTH with Yadif 2x Deinterlacing enabled... but most of the time there are one or several dropped frames.

I don't *think* it's a PC performance issue... I went under my Windows "Graphics performance preference" in Graphics Settings and set OBS Studio to High Performance. When I'm recording video, my CPU usage in the lower-right screen of OBS rarely goes above 1%.

Any suggestions? And what other information and/or screenshots can I provide to help diagnose the problem?
Log file here

Thank you!

Attached are screenshots of my current settings.

 

[CaseyStelken]

There was several days in between my submitting this post and it being approved, so this is a little bump to make sure it doesn't get overlooked by anyone who might be able to offer help. Thanks!

 

[qhobbes]

Your input is fps: 29.97, Yadif 2x doubles the frame rate, so go to Settings > Video > Common FPS Values: and change it to 59.94.

 

[CaseyStelken]

Your input is fps: 29.97, Yadif 2x doubles the frame rate, so go to Settings > Video > Common FPS Values: and change it to 59.94.

Thank you! I just now gave that a shot, but unfortunately, the "stuttery" frame rate looks the same.

 

[qhobbes]

Try using regular Yadif and set output to 29.97.

 

[CaseyStelken]

Hm... same thing. Everything looks pretty smooth (as far as the frame rate and panning movement is concerned) with deinterlacing disabled, but with Yadif turned on and output to 29.97, I get the same "stuttery" results.

 

[CaseyStelken]

One last bump just to make sure no one has any other ideas.

 

[CaseyStelken]

UPDATE:

Problem solved. I threw away my Elgato capture cable and purchased the I-O Data GV-USB2. Everything looks fantastic.