Date: Mon, 2 Jan 2006 03:53:25 +0100 From: "Frank J. Beckmann" <frank@barda.agala.net> To: freebsd-multimedia@freebsd.org Subject: Re: ffmpeg doesn't record sound from WinTV. Message-ID: <200601020353.26510.frank@barda.agala.net> In-Reply-To: <20051230114354.GA13494@puff.jakemsr.gom> References: <200512240440.46994.frank@barda.agala.net> <20051230105729.1df83d74.steve@sohara.org> <20051230114354.GA13494@puff.jakemsr.gom>
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Moin, am Freitag, 30. Dezember 2005 12:43 schrieb Jacob Meuser: > On Fri, Dec 30, 2005 at 10:57:29AM +0000, Steve O'Hara-Smith wrote: > > On Thu, 29 Dec 2005 20:24:04 -0800 > > > > Jacob Meuser <jakemsr@jakemsr.com> wrote: > > > On Thu, Dec 29, 2005 at 01:39:21PM +0100, Frank J. Beckmann wrote: > > > > Moin, > > > > > > > > ffmpeg records sound from outher devices. So I guess that it doesn't > > > > tell the > > > > > > > > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > > > > > TV card to send the audio stream to it's line out. ffmpeg has the > > > > only really > > > > > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > > > > no, bktr(4) always does that. it is only possible to select the > > > inputs. all outputs are enabled when the tuner is unmuted (which > > > happens by default when the tuner is open()'d). > > > > Yes that should be the case - but ffmpeg will emit an error message > > if opening the tuner fails and that error message is not present. > > > > > do you hear audio when you run the above ffmpeg command? if so, then > > > the problem is solely with the audio grabbing, not bktr. make sure > > > your mixer is set right. > > > > The mixer settings originally posted look correct to me (assuming > > the plug really is in line and not line1 or something silly like that). > > yup, missed that. > > only other things I can think of, are a) make sure the soundcard supports > recording of 48kHz 16-bit stereo (again, would probably see an error > message if not) and b) check that ac3 encoding actually works in that > version of ffmpeg (and that whatever is playing it back supports ac3 > decoding). otherwise, maybe try changing audio parameters. I checked all that. And ffmpeg does record sound if I plug another source instead of the sound output of the tv card there. > still, though, if you hear sound when you run the ffmpeg command, the > problem is not in bktr, but audio. bktr just sends audio to the > soundcard. you don't record audio from bktr, but from the soundcard. I don't hear sound when I use ffmpeg. I hear sound when I use moTV. I also hear sound when I use ffmpeg with another sound source. -- Bye Frank
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