Hi Denis, This sounds very interesting, and is a quite similar setup to what I would like to use.
Denis McLaughlin wrote: > - While the USB 2 bus can support 8 streaming cams, there seems to be a > fair bit of jitter in capture time. The capture utility I wrote > time-stamps each frame as it receives it, but while the frames are > generally uniformly spaced 0.066s, there are occasional dropouts and > periods where frames are snapped very quickly one after another. I > haven't done enough testing to know whether this jitter gets worse with > more web cams or not. That doesn't sound very good for my application, since I need synchronised images (audio is not so important for me). Is the timestamp you recorded an accurate indicator for the capture time, or is it independent from that? > - Likely as a consequence of the time jitter in the USB bus (or maybe a > problem with the cams? or maybe my capture program?), I'm having a lot > of trouble trying to synchronize the video streams from the fusions with > the audio I recorded. I'm still working on a solution to this one... :( If the timestamp itself is a reliable measure for the jitter, it might be possible to leave out or duplicate some frames in post processing. > My 640x480 MJPEG frames come in around 70k apiece. Great. Sounds like a very managable amount of data. ciao Pablo _______________________________________________ Linux-uvc-devel mailing list [email protected] https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
