GPU for recording 1080p 60fps in OBS Studio

[bigbadben]

I want to capture 1080p 60fps upscaled VHS footage without dropping frames in OBS Studio.

My specs:
i7 3770
Intel HD 4000
16GB RAM
256GB SSD (boot) + 1TB HDD

Is my GPU adequate? If not, what would be the minimum? Given that it’s just video, integrated graphics should be enough right? I tried recording at 1080p once and was dropping frames, even though my CPU was at 4%.

[jagabo]

Are you using the GPU or CPU to encode? If you're using the CPU it doesn't matter what GPU you are using -- the GPU isn't involved in the process. If you're not compressing the video while recording the problem is disk drive bandwidth.

[Forenzik]

All of my dropped frame issues and studder went away when I transitioned from a HDD to a NVM.e drive. I can literally capture a stream while doing processing on another file at the same time now that I have 2000 MB/s disk transfer rates.

[bigbadben]

If the comb filter on my passthrough DVD recorder is on, and my AV to HDMI converter box converts to 1080p, will it deinterlace twice or once? Is having the comb filter on on the DVD recorder harmful to the picture quality if it's already deinterlaced by the box? And is the converter box changing the fps from 25 fps to 60 fps harmful or beneficial?

[jagabo]

The comb filter in your DVD recorder isn't a deinterlacer. It's a filter for separate luma and chroma from a composite signal.

But the deinterlacer and upscaler in your AV to HDMI box are mediocre. You would be much better off capturing SD interlaced video then deinterlacing with QTGMC and upscaling with nnedi3 in AviSynth.

[bigbadben]

There is a minor flickering issue on patterns. Like say there are many lines together and they wobble. I suppose that’s due to the framerate. Will limiting the fps to 25 fix this? Or because the upscaler increased it to 60fps I’ll lose frames?

[jagabo]

29.97 fps may reduce some of the interline twitter but will introduce a lot of flicker on high contrast motion like shaky handheld camcorder video. It will also make the aliasing of near-horizontal edges more visible.

[bigbadben]

29.97 fps may reduce some of the interline twitter but will introduce a lot of flicker on high contrast motion like shaky handheld camcorder video. It will also make the aliasing of near-horizontal edges more visible.

My VHS tapes are PAL. Their FPS is 25. The converter box upscales the resolution to HD and converts the FPS to 60. If I set my capture card device settings to 25 FPS and the output to 25FPS in OBS Studio will the converter still be converting it to 60FPS and I'd be losing frames when capturing with my capture card, or will my capture card just capture 25 FPS meaning it captures everything?

[lollo]

My VHS tapes are PAL. Their FPS is 25. The converter box upscales the resolution to HD and converts the FPS to 60.

Such a device is not recommended.

I want to capture 1080p 60fps upscaled VHS footage without dropping frames in OBS Studio.

If your vhs tapes are PAL 25fps, why do you want to capture them "1080p 60fps upscaled"?

[jagabo]

My VHS tapes are PAL. Their FPS is 25.

Then they should be captured as 25 fps, interlaced. Each of those frames contains two pictures, intended to be viewed separately and sequentially, at 50 pictures per second. With proper encoding and playback they should be displayed at 50 fps progressive on modern TVs.

The converter box upscales the resolution to HD and converts the FPS to 60.

That is the wrong rate for your 25i VHS tapes. It should be 50 fps if the converter box is deinterlacing, 25 fps if not. In my experience, those types of converters deinterlace.

If I set my capture card device settings to 25 FPS and the output to 25FPS in OBS Studio will the converter still be converting it to 60FPS and I'd be losing frames when capturing with my capture card, or will my capture card just capture 25 FPS meaning it captures everything?

Unless your converter box has a setting for 25 fps interlaced, or 50 fps progressive you will be converting 25 fps interlaced to 60 fps progressive then the capture device will discard 35 of every 60 frames (7 of every 12) it receives from the converter box, leaving 25 fps progressive. The final result will be flickery, jerky motion.

You're entire capture process is messed up. And that type of capture has so many places the video can be screwed up. You should at least upload sample captures for analysis.