Date: Fri, 12 Oct 2007 10:35:58 +0300 From: Achilleas Mantzios <achill@matrix.gatewaynet.com> To: Mark Tinguely <tinguely@casselton.net> Cc: freebsd-multimedia@freebsd.org Subject: Re: Zoneminder and multichannel cards Message-ID: <200710121035.58934.achill@matrix.gatewaynet.com> In-Reply-To: <200710111316.l9BDG2LZ093155@casselton.net> References: <200710111316.l9BDG2LZ093155@casselton.net>
next in thread | previous in thread | raw e-mail | index | archive | help
=CE=A3=CF=84=CE=B9=CF=82 =CE=A0=CE=AD=CE=BC=CF=80=CF=84=CE=B7 11 =CE=9F=CE= =BA=CF=84=CF=8E=CE=B2=CF=81=CE=B9=CE=BF=CF=82 2007 16:16, =CE=BF/=CE=B7 Mar= k Tinguely =CE=AD=CE=B3=CF=81=CE=B1=CF=88=CE=B5: > > Just a question, in context with our previous discussions. > > I managed to capture video from more than 1 camera, in zoneminder. > > I'd like to ask, whats the theoritical max fps for each of 4 cameras > > using the bktr driver in its FreeBSD-6.2 state? > > In my code, with METEOR_CAP_CONTINOUS (single camera) it can do > > > > (as ZM reports) 25 fps (which AFAIK is good), whereas with all 4 camer= as > > and by using METEOR_CAP_SINGLE, the fps drop down to 2.5 fps/camera. > > You are getting 25fps (PAL/SECAM?) with free-running captures, and 10 fps > when your capture switches and single captures. That sounds about right. > I don't know the input switching speed. Also, the video inputs of the > different cameras are not going to aligned to each other and also not > aligned to the program that calls the METEOR_CAP_SINGLE. I would expect > that every capture will have to wait for the start of a new video frame. I tried yesterday with the "official" slax based linux live CD that=20 LinuxMediaLabs provides, and i got worse results. I got about total 8 fps (PAL) with all 4 inputs active. As a result, i got even worse image quality than with the FreeBSD/bktr code. Amazing! > > --Mark. =2D-=20 Achilleas Mantzios
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200710121035.58934.achill>