From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.emergencycommunicationsystems.com ([24.123.23.170]:51025 "EHLO unifiedpaging.messagenetsystems.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755046AbZFZSYr (ORCPT ); Fri, 26 Jun 2009 14:24:47 -0400 Message-ID: <4A451049.2060801@messagenetsystems.com> Date: Fri, 26 Jun 2009 14:15:37 -0400 From: Robert Vincent Krakora MIME-Version: 1.0 To: Devin Heitmueller CC: Andy Walls , video4linux-list@redhat.com, linux-media@vger.kernel.org Subject: Re: Bah! How do I change channels? References: <1246017001.4755.4.camel@palomino.walls.org> <829197380906260642m2cd87ae5qd6487dc5eae91e51@mail.gmail.com> <829197380906261023n7e960f43pcd25d82eb12f91dd@mail.gmail.com> <829197380906261032h2f5f5828p94ba7519ce7f38db@mail.gmail.com> In-Reply-To: <829197380906261032h2f5f5828p94ba7519ce7f38db@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Devin Heitmueller wrote: > On Fri, Jun 26, 2009 at 1:28 PM, Robert > Krakora wrote: > >> Yes, it is run after mplayer initially tunes it. However, what is the >> difference between mplayer tuning and v4l-ctl tuning? They are both >> submitting the same IOCTLs to the driver to accomplish the same end >> result; or is mplayer probably submitting some additional IOCTLS to >> "wake" the device? >> > > The issue is that the tuner gets powered down when the v4l device is > closed. So, when running mplayer first, and then v4l-ctl is being > used to tune, the file handle is held active by mplayer. But if you > run v4l-ctl first, the v4l-ctl opens the handle, tunes successfully, > and then closes the handle (which powers down the tuner). Then when > running mplayer (or whatever app), the handle gets reopened but the > tuner is not tuned to the target frequency that v4l-ctl set. > > Devin > > Aaahh yes...I think that you have told me that once before...sorry for making you repeat yourself... However, with ivtv-tune I can issue a tune to a channel and then open mplayer with no tuning parameters and that channel is playing... -- Rob Krakora Senior Software Engineer MessageNet Systems 101 East Carmel Dr. Suite 105 Carmel, IN 46032 (317)566-1677 Ext. 206 (317)663-0808 Fax