Question / Help External Capture Device Recordings Choppy

[PureChaosX]

As the title says, I'm having issues capturing footage with OBS using an external capture device... which is an AVerMedia LGP Lite to record my Xbox One X footage.

The recordings come out looking great, nice and sharp, but the playback in general feels very sluggish and jerky compared to recordings done with the AVerMedia software.

I tried to upload a comparison video of the two to YouTube:
720p Version: https://www.youtube.com/watch?v=f6ub1LltEF0
1080p Version: https://www.youtube.com/watch?v=d4pH0Zi3580
But it's probably not the best way to compare.

My settings in OBS are as follows:
Type: Standard
Recording Format: TS or MKV
Encoder: nVidia NVENC H.264
Rate Control: CBR
Bitrate: 15000
Preset: Max Quality
Profile: High
FPS: 60

PC specs are:
Windows 10 Pro x64
SanDisk Ultra II 480Gb SSD -- (Capture Location)
Western Digital Blue 1Tb x2
Intel Core 2 Quad Q6600 OC'd @ 3.00GHz
6Gb DDR2-800 PC2-6400
EVGA GeForce GTX 750 Ti SC 2Gb

Presumably my PC is capable of handling video capture. I have streamed a few times with the LGP Lite using OBS and the stream was absolutely fine, not sluggish or jerky in anyway. I should say that if I capture video while watching YouTube on my Xbox One or a video via Media Player, recording and playback appear to play perfectly fine. But when I switch to a game (or even the dashboard) the recorded video is sluggish.

I assume that OBS is able to perform video capture from external capture devices and not just streaming. Does anyone know why my captures are of lesser quality with OBS, and don't seem to play back smoothly. They don't stutter or lag anything like that, they just seem to play slower than they should.

 

[orboe]

Please post a log.
https://obsproject.com/forum/threads/please-post-a-log-with-your-issue-heres-how.23074/

It will help with finding the issue. I watched the videos (Not having ever played that game) and they looked good to me. I understand you are saying that it feels slower and not that it is stuttering but I do not have the point of reference of what the game should feel like.

From what I can see, that capture card can only record a 1080p30 signal. Might that be what you are feeling?

 

[PureChaosX]

Log file (hopefully) attached.

That's correct... the recordings all look and feel a little slow compared to recordings done by the capture devices own software. However, it doesn't feel like it's running at 30fps even though that is the capture cards 1080p limit. I've tried recording at 720p 60fps and it still looks to have the same result.

If you watch the video to the mid-boss and watch the spinning sphere on the OBS side, then look at the same sphere on the AVerMedia side. The OBS one looks a little jittery (but not laggy or anything) and not as smooth.

 

[orboe]

So recording in 60fps when the capture card only outputs 30fps wastes bitrate on duplicate frames. So it would be better to set everything to 30fps. This log looks like you did not run the stream or recording for 5 minutes before exporting it. That would help out a lot to see what is going on.

 

[PureChaosX]

Nuts... I'll set everything to 30fps and give another recording a go, for more than 5 minutes... I did export ONE recording from MKV to MP4 and was still sluggish. But I shall give a 30fps recording a shot and post back another log.