[linux-dvb] V4L vs DVB [bcc][faked-from][heur][spam-bayes]

Manu Abraham abraham.manu at gmail.com
Thu Sep 21 12:11:52 CEST 2006

Mark Howells wrote:
> Hi Steve 
>> -----Original Message-----
>> From: Steven Toth [mailto:stoth at hauppauge.com] 
>> Sent: 20 September 2006 13:26
>> Subject: Re: [linux-dvb] V4L vs DVB 
>> Last I checked, VDR did not use V4L, it's a DVB (and maybe 
>> ATSC) DVR application.
> Maybe so - I haven't really checked yet. I'm still learning about this stuff....
>> "Assuming a decent tuner lock", your basic assumption is true 
>> but the subject runs much deeper than that.
> Always, but at last my basic understanding appears to be correct. Can a V4L device provide MPEG streams like a DVB device? How does it provide EPG type info?

Couple of differences.

EPG, as regards to DVB is extracted from the Service Information (MPEG2
SI) V4L doesn't use any MPEG SI

DVB uses the dvr (/dev/dvb/adapterX/dvrY) device for a MPEG stream.
V4L uses /dev/v4l/videoX or /dev/videoX

Basically, V4L is used for analog stuff.


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