It was fluid video in each camera, just at a lower frame rate. Ed On Mon, 21 Jul 2003, Curi Fabio Eduardo (SFL) wrote: > In your test with 2 or 3 inputs, obtain fluid video in each camera? or they > is fluid in a moment and stop in lags in other moment? > > Fabio > > > -----Mensaje original----- > > De: Ed Okerson [mailto:eokerson@xxxxxxxxxxxxxxxx] > > Enviado el: domingo 20 de julio de 2003 21:12 > > Para: video4linux-list@xxxxxxxxxx > > Asunto: RE: multiple open()'s on the same device > > > > > > On Sun, 20 Jul 2003, Ryan Ayers wrote: > > > > > > From: Christian Hack > > > > I still stand by my statement. Does the windows version > > capture full motion > > > > on all 4 channels. The only simultaneous capture cards I > > have seen have a > > > > different capture chip or have more than one capture chip fitted. > > > > > > > > Feel free to prove me wrong though. ;-) > > > > > > > > CH > > > > > > I've spoken with Gerd about this previously. The only way > > todo this with > > > the current linux bttv driver, is to switch inputs (very slowly). > > > Generally, this means, grab 1 frame, switch and skip 5 > > frames (waiting for > > > the video device to settle down). This gives a realistic > > throughput of > > > about 2 fps switching between 2 inputs. This is totally > > unacceptable for a > > > surveillance solution. There is some trickery going on in > > the windows > > > driver, because the exact same card with the windows driver > > can capture > > > around 10-15fps across 2 inputs. > > > > I have successfully used the package at > > http://motion.sourceforge.net to > > get much better switching between ports on bttv based cards. > > It uses the > > vloopback device to attach different inputs to virtual > > /dev/video devices. > > I had no problems getting 13-15fps from two inputs, and > > 8-10fps from three > > inputs. > > > > Ed Okerson > > > > > > > > > -- > video4linux-list mailing list > Unsubscribe mailto:video4linux-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/video4linux-list >
