My PC env specMB: GIGABYTE B760itx AORUS PRO DDR4
CPU
13th Gen Intel(R) Core(TM) i5-13490F
Memory
32.0 GB
Available 27.8 GB
Cached 1.7 GB
GPU 0
NVIDIA GeForce RTX 4070 Ti SUPER
Driver version: 32.0.15.6590
Driver date: 9/26/2024
DirectX version: 12 (FL 12.1)
iPi Recorder 4.7.0.98
OS: Microsoft Windows NT 10.0.19045.0 (64 bits)
.NET: 4.7.2.533325
CPU count: 16
GC: workstation (Interactive)
Running in 64 bits
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ISSUE that I metThe way to produce the issue:
1. Open 'Recorder 4'.
2. Plug in just '1' C922PRO cam.
3. Start recording, and see
Preview + Cam Setup.
3.1. I can see Cam but no Microphone even click on refresh.
3.2. The preview.
Attachment:
1st shoot.png [ 222.22 KiB | Viewed 343 times ]
4. Then follow the proc and the recorded video is 59.6fps, which is nothing wrong (juts like IPI doc said, 'it has a little bit drop from 60fps').
5.
Then do another record. The cam is plugged in still, no re-plug. 5.1.
Now Microphone shows up. But the preview has only 60fps for few seconds then drop to <20fps. Attachment:
Screenshot 2024-10-07 042004.png [ 64.61 KiB | Viewed 343 times ]
5.2.
Left the cam setup with no change and the color is different from the 1st shoot. Attachment:
2nd shoot.png [ 240.05 KiB | Viewed 343 times ]
Other ConcernsI found setup like 'Auto Exposure' or 'Auto White Balance' can impact FPS.
I can tune setup params, and got a stable 1080p30fps. When I use the same setup and switch to 720p60fps, it only gives me ~32fps.
I have no idea why this happened
even I only use one camera. 1080p should be = 1.5^2 * 720p pixels and 60fps = 2 * 30fps, which will have similar data size.
I will record the issue reproduction into one video and post later.