I started a thread a few months ago looking for a linux equivalent of Windows "virtual audio cable." Basically this is the same question.
I ended up needing something different, but I believe using jack was the suggested solution. What I needed was a way to take a program that pipes a sound file and make it look like a device so that another program could open that "device" and process the audio. IIRC, I did it with a "virtual device." (Terminology could be wrong, but the basic idea is the gist here.) I don't have that machine booted to look it up. What the original poster is trying to do is common for gamers and streaming video er um archiving. ;-) I saw it discussed on gaming forums when I did my search on VAC. Google found this: http://www.vsound.org/ But I can't say if it works. Jack and Pulse isn't alsa's problem. But perhaps a guru (as opposed to me!) could write up the virtual device scheme, which is nearly in alsa's camp. I believe a virtual device can be used to solve this post, though it is not a unique solution. Youtube is full of these recorded games, sometimes hilarious content if you like slapstick. ;-) -----Original Message----- From: Bill Unruh <un...@physics.ubc.ca> Date: Sun, 28 Jul 2013 14:06:38 To: YuGiOhJCJ Mailing-List<yugiohjcj-mailingl...@laposte.net> Cc: <alsa-user@lists.sourceforge.net> Subject: Re: [Alsa-user] recording audio from speakers On Sun, 28 Jul 2013, YuGiOhJCJ Mailing-List wrote: > I use ffmpeg to record because I like this software. > The main advantage is the impressive number of options available (choice of > the video size, video codec, audio codec, ...). > Also, I am recording images + audio (= video) so I need ffmpeg. OK, that is fine. Exactly what video/audio streams are you capturing? Ie, there may be some way that someone knows to caputre it directly (I am sorry I do not). Is it some sort of streaming video? Is it some sort of skyping or phone conversation? Letting the group know could be very helpful in getting help to you. ffmpeg may well be good for recording video. If it were just audio, then other solutions would suggest themselves including creating alsa PCMs which copy the audio sent to the sound card to a file as well. But for video that would clearly not be sufficient. > > Do you see how to capture what I hear during the record ? > > On Sun, 28 Jul 2013 03:03:02 -0700 (PDT) > Bill Unruh <un...@physics.ubc.ca> wrote: > >> On Sun, 28 Jul 2013, YuGiOhJCJ Mailing-List wrote: >> >>> Yes, I confirm, "what you hear" is what I mean. >>> >>> Do you see any way to do this with ffmpeg/alsa ? >> >> The easiest way of course is to simply capture the stream that youare >> displaying on your desktop. Ie, something is already sending a digitial >> signal >> containing video and audio to your desktop. Your computer is then >> interpreting >> that and sending it out to your monitor and out your soundcard. Why not just >> intercept that stream before it is interpreted by your computer, and just >> saving that? Ie, if you told us what you wanted to save, it allow us to make >> suggestions that would do what you want. >> >> For example you did not tell us originally why you were using ffmpeg which >> has >> to do with video, to capture an audio stream. aplay is a far simpler way of >> capturing audio than ffmpeg ( or audacity, or other sound software) >> >>> >>> On Sun, 28 Jul 2013 03:28:03 +0000 >>> li...@lazygranch.com wrote: >>> >>>> Regarding recording the speakers, I think the poster wants the equivalent >>>> of "what you hear" on windows machines. >>>> >>>> >>> >>> ------------------------------------------------------------------------------ >>> See everything from the browser to the database with AppDynamics >>> Get end-to-end visibility with application monitoring from AppDynamics >>> Isolate bottlenecks and diagnose root cause in seconds. >>> Start your free trial of AppDynamics Pro today! >>> http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk >>> _______________________________________________ >>> Alsa-user mailing list >>> Alsa-user@lists.sourceforge.net >>> https://lists.sourceforge.net/lists/listinfo/alsa-user >>> >> >> -- >> William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 >> Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 >> UBC, Vancouver,BC | Program in Cosmology | un...@physics.ubc.ca >> Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ > > ------------------------------------------------------------------------------ > See everything from the browser to the database with AppDynamics > Get end-to-end visibility with application monitoring from AppDynamics > Isolate bottlenecks and diagnose root cause in seconds. > Start your free trial of AppDynamics Pro today! > http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk > _______________________________________________ > Alsa-user mailing list > Alsa-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/alsa-user > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | un...@physics.ubc.ca Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
