----- Original Message ----- From: "Lucas Correia Villa Real" <lucasvr@xxxxxxxxxxxxx> To: <video4linux-list@xxxxxxxxxx> Sent: Sunday, July 20, 2003 1:06 PM Subject: Re: multiple open()'s on the same device > On Saturday 19 July 2003 23:47, Christian Hack wrote: > > ----- Original Message ----- > > From: "Lucas Correia Villa Real" <lucasvr@xxxxxxxxxxxxx> > > To: <video4linux-list@xxxxxxxxxx> > > Sent: Sunday, July 20, 2003 12:35 PM > > Subject: multiple open()'s on the same device > > > > > Hi, > > > > > > I am playing with a Bt878-based card, which has 4 input sources. > > > Actually, using bttv 0.9.11, I can open() the v4l device twice, but I > > > can't capture data using different input sources (television on app1 / > > > composite1 on > > > > app2). > > > > > Is this possible on the current status of bttv drivers? Please note I > > > > didn't > > > > > try this with applications other than xawtv. > > > > This physically isn't possible (and thus never will be) since there is only > > one capture device on the card. The different inputs are merely switched > > between the capture section of the BT878. > > The card has only 1 bt878 chip, and 4 inputs. It has a software/driver for > Windows, and it can capture using the 4 inputs at the same time. > What happens with xawtv is that I can switch between input source, but can't > open 2 xawtv sessions, each one using a different input source (what is > perfectly done on Windows). > > By the way, I have continued to search on the archives and saw this post: > https://listman.redhat.com/mailman/private/video4linux-list/2003-March/msg00 226.html > 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
