Hi Robin,
I found a problem with SC 4.0.7596.0 (SC Pro 32bit, W10 20H2 64bit, AMD Ryzen 3 3200U, 8GB) using an USB grabber "Hauppauge Cx23100 Video Capture", connected to a WATEC 902H2 video camera.
The grabber is properly installed and runs without problems with several software like VDub, Syntec Video View and also SC 3.2.6482.0.
With SC 4.0.7596.0, I see already in the preview's bottom line dropped frames of about 60% of frames counted. Recorded AVI/SER files show a lot of dropped frames (not so with SC SC 3.2.6482.0).
I attach log files and camera settings from 10s-avi-captures with 3.2 and 4.0. Please let me know if you need more information.
(A test under W7-64 shows the same issue.)
Cheers, Christian
Problem with an USB Grabber
Problem with an USB Grabber
- Attachments
-
- log.7z
- (10.99 KiB) Downloaded 63 times
- admin
- Site Admin
- Posts: 13339
- Joined: Sat Feb 11, 2017 3:52 pm
- Location: Vale of the White Horse, UK
- Contact:
Re: Problem with an USB Grabber
Hi,
thanks for the report - I can also see the effect with webcams now I know to look. Initially I thought it was some sort of complex inter-thread timing issue, but it turns out that I had removed some old code (and not done it quite properly) - that meant that each frame from the camera was being processed twice, but SharpCap was then dropping the second copy most of the time.
I have a fix now
Robin
thanks for the report - I can also see the effect with webcams now I know to look. Initially I thought it was some sort of complex inter-thread timing issue, but it turns out that I had removed some old code (and not done it quite properly) - that meant that each frame from the camera was being processed twice, but SharpCap was then dropping the second copy most of the time.
I have a fix now
Robin
Re: Problem with an USB Grabber
... and SC gets better and better ...I have a fix now
Thanks, Christian
Re: Problem with an USB Grabber
Testing with beta 7644: fixed.
Thanks
Christian
Thanks
Christian