Hi all, I am trying to build a synchronized multiple cameras capture. I started with 2 Logitech QuickCam UltraVision USB webcams.
I have difficulties synchronizing them. In my tests, I manage to extract the exact timestamp of each captured frame. So then the synchronization can be made by sofware (comparing timestamps). But I would prefer the cameras to be directly synchronized at the source (shot on each camera is taken at the same time). The only way I found to do that for the moment is starting the 2 cameras at the same time (simultaneous call of VIDIOC_STREAMON for the 2 cams. I use mmap method, USB isochronous transferts). Frames appear to be more or less synchronized. However sometimes, the 2 cameras start totally dephased. Is there a way to be more precise in the image capture start? Thanks in advance for any help! Julien Quelen _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
