From owner-freebsd-hackers@FreeBSD.ORG Thu Jun 21 20:29:35 2012 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E0917106564A for ; Thu, 21 Jun 2012 20:29:35 +0000 (UTC) (envelope-from dieterbsd@engineer.com) Received: from mailout-us.gmx.com (mailout-us.gmx.com [74.208.5.67]) by mx1.freebsd.org (Postfix) with SMTP id 872248FC0C for ; Thu, 21 Jun 2012 20:29:35 +0000 (UTC) Received: (qmail 22279 invoked by uid 0); 21 Jun 2012 20:29:29 -0000 Received: from 67.206.186.139 by rms-us013.v300.gmx.net with HTTP Content-Type: text/plain; charset="utf-8" Date: Thu, 21 Jun 2012 16:29:26 -0400 From: "Dieter BSD" Message-ID: <20120621202927.303410@gmx.com> MIME-Version: 1.0 To: freebsd-multimedia@freebsd.org X-Authenticated: #74169980 X-Flags: 0001 X-Mailer: GMX.com Web Mailer x-registered: 0 Content-Transfer-Encoding: 8bit X-GMX-UID: cOGRb+EX3zOlNR3dAHAhTUN+IGRvb0BL Cc: freebsd-hackers@freebsd.org Subject: (no subject) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Jun 2012 20:29:36 -0000 user.vdr writes: >>> Recording doesn't require any compression unless you are transcoding >>> in real-time. There's no difference between recording ATSC, NTSC, PAL, >>> etc, and it's actually irrelevant what the stream is. >> >> This is incorrect. ATSC is compressed before broadcast, so >> you receive the data already compresed.  NTSC and PAL are >> broadcast in analog. The tuner performs A-to-D which gives >> an uncompressed data stream.  Have fun trying to store that. >> As a practical matter, you have to compress the data in real time. >> Some, not all, tuners include hardware compression. > > With very very very few exceptions, all analog NTSC broadcasts have > been switched to digital, by the FCC mandated deadline of June 12, > 2009. As long as there remain some NTSC broadcasts, there might be some that you wish to watch.  That's why I wrote: >>>> You'll need to know if you have any NTSC (analog) stations you >>>> care about or if everything is ATSC (digital). Aryeh may or may not have any NTSC stations of interest. Given "we are using a broadcast signal only [current US {NYC} standards]" I rather doubt that Aryeh has any PAL stations to worry about. > You absolutely do NOT have to reencode a stream I did not say anything about RE-encoding anything.  Only about encoding/compressing the high bandwidth datastream the tuner generates from NTSC.  And to be clear, this only applies to NTSC, not to ATSC. > Tuners do NOT provide raw audio/video to the system in any case. http://corona.homeunix.net/cx88wiki/Overview/RawVideo