Sorin Milutinovici wrote: > > Is it possible (using a TV tuner) to capture several TV stations on one > computer using one card? I need to obtain different movie files at the end. > Also, the system has to work 24/24. This question is typical and it comes from time to time again. Yes it is possible but with very low frame-rate (for current hard stands.). The time you need to re-sync the tuner and capture data is the bottleneck. > > Has anyone experience with that sort of things? Yes the ATI (old GATOS) mail list has some discussion about this. Look at late 97's early 98's postings. Unfortunately the project has changed a lot so far. (problems with ImpacTV chipset and others...) Even the old AIW board owns a program capable of doing so with a very low 'pathetic' frame rate. > > How fast can such a tuner switch channels? Fast enough to capture say 4 > stations at 12 frames/sec?. If the answer is yes (or close to yes) I would > appreciate a few pointers for: few per second and more likely to drop frames on heavy load. > > 1. Selecting the TV tuner. Go Philips. The I2C is the better thing so far. Also they've been presenting the best tuners I've seen since the early 80's. > 3. Anything else that looks appropriate. > PIP techonoly. Your chances to get better results increase by using 2 "FULL" tuners (e.g RF amp + IF cvtr + detectors + ADC ). This is how PIPs put in real time two images on the screen at 30 fps with full sound (2 tuners). A second board will help you. As one board is doing the job of re-syncing (stable) the other is delivering data. You need to sync your scripts to do things precisely at data arrivals. (more likely kernel IRQs/ISRs handlers) Hope it helps, Abracos PCastro -- HOM: http://www.momentus.com.br/users/hook/ GPG: http://www.momentus.com.br/users/hook/GPG-PauloCastro.asc
