El Miércoles, 5 de Septiembre de 2007 23:16, escribió: > hi alberto :) > thx for your informative reply on the freevo list, but i have another > question, which imho is not really directly about freevo, so i thought, i'd > try and contact you directly, hope u don't mind ;) > > > Some cards have two receivers/tuners. It's just like having two cards. > > Also, each digital stream have more than one channel. So it's possible to > > record two channels if they are in the same stream (with one receiver, of > > course). > > you say if they are in the same stream, sorry but i'm not so knowledgable > ;) but what does that mean exactly? what are those streams exactly and how > can find out e.g. which channels my dvb-C so digital cable provider puts in > which streams etc.? how do i find out which channels are in which stream > and how many streams there are? thank you very much in advance have a good > one ;)
Hi. I don't mind answering to you, but you could also ask the same in the list. So I'm cc'ing there. Your question: what about streams? In analog tv, every channel comes in a frequency (so to speak) and each frequency only carries a channel. So when you want to see a channel, your card tells the tuner to receive that frequency, and then the data can be received and so on. In digital tv, this is a bit different. In digital technology, as you surely know, all data is converted into binay symbols (1/0). So every tv channel (with audio, video, subtitles, etc) in converted into 1 and 0. The good point is that you take several tv channels and put all their 1 and 0 together. You are multiplexing them. Then, you call all this an stream. You air the stream with a frequency, so this frequency carries more than one channel. In dvb-t it's four channels, and in dvb-s it might be 8, but I'm not sure. It doesn't matter either. So what's the point? If you have two cards (or a card with two tuners) you can see/record two channels at once. That's obvious. But if you have only one, and you are lucky enough to want to see/record two channels from the same stream, then only one card is needed. Of course, you need the software to handle this, but as I said, I think freevo 2 will have this feature. So, how can you know? You should check if your provider gives you this info. For example, using an example from Spain, I know how dvb-t is working, so I know that I could see "tve1" while recording "la 2" with only one card, but I couldn't see "la sexta 1" while recording "la sexta 2". You need info for this. I don't know if epg (electronic program guide) has this info. I hope that my explanation is clear enough. Alberto ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Freevo-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freevo-users
