Date: Sat, 23 Oct 2021 12:01:04 +0200 From: Hans Petter Selasky <hps@selasky.org> To: J P <webplication@gmail.com> Cc: freebsd-multimedia@freebsd.org Subject: Re: tee-like function via virtual_oss Message-ID: <601c3042-4f7f-016e-56dd-69dfea382eb2@selasky.org> In-Reply-To: <CABcCtUR2B4BajCK=FKbpOvkJNMw-4=HDO7BG-L8TrE=DkmvaSg@mail.gmail.com> References: <CABcCtURUbpfGk6U7qjycqEoBp5WKOzYUwuJbjMOXqDCMZtKtPQ@mail.gmail.com> <03103736-8052-5901-b5bf-288a313af874@selasky.org> <b31c652f-49b5-9d93-640a-242cdcce56dc@selasky.org> <CABcCtUSK4MZP8hPYjhNaVR_GT%2BnWghEFLpwviYpkEmwYeRGkxA@mail.gmail.com> <8ff167fe-51e7-2239-2fa6-69a935a5dc11@selasky.org> <CABcCtUQaFQwD-hsbOXpEUFa-wEQ8aenH5NSj-8o9xqpH05fP1w@mail.gmail.com> <CABcCtUSF1CS6c4NSKx0WRHUwGffE8azTdC20%2BoUxF_VT6OFYcw@mail.gmail.com> <65abdb25-fc5f-e760-7558-8713dbc2ed50@selasky.org> <CABcCtUR2B4BajCK=FKbpOvkJNMw-4=HDO7BG-L8TrE=DkmvaSg@mail.gmail.com>
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On 10/23/21 10:57, J P wrote: > Hi, > so I finally got some time to play with this thing. > > Virtual_oss does work as you indicate as long as I use sox'splay/rec as in > your example. > > When I use firefox it does play but when I record there is no sound in the > recorded file. > > I have firefox compiled as follows: > Options : > ALSA : off > CANBERRA : off > DBUS : on > DEBUG : off > FFMPEG : on > JACK : off > LIBPROXY : off > LTO : off > OPTIMIZED_CFLAGS: on > PROFILE : on > PULSEAUDIO : on > SNDIO : off > TEST : off > > Firefox uses PA, so I can set the playback device to the newly created > dsp0.9 (it pops up as a duplicate dps0, I mean, by the same name) but it's > there, reproduces audio and I can set the volume: > cat /dev/sndstat > Installed devices: > pcm0: <ATI R6xx (HDMI)> (play) default > pcm1: <ATI R6xx (HDMI)> (play) > pcm2: <Realtek ALC662 rev3 (Analog)> (play/rec) > pcm3: <Realtek ALC662 rev3 (Front Analog Headphones)> (play) > pcm4: <USB audio> (play/rec) > Installed devices from userspace: > pcm0: <Virtual OSS> (play/rec) > dsp0.9: <Virtual OSS> (play/rec) > > Note how the "original" device although it's still there, is not functional > from firefox (i.e. plays no sound anymore), I do have to switch to the new > device for playback. This behavior is not shown by mplayer, for example, > that uses whatever the hw.snd_default_unit is, in this case pcm0, and > works. Sox's play, needs the env AUDIODEV to be set to the news device to > work, otherwise plays no sound either. > > Nevertheless, the file recorded when firefox reproduces audio, contains > only 0s. > Can you suggest how to solve? Thank you. > BR Hi, Just a wild guess: In Firefox there is something called "about:config". There you enter the key "media.cubeb.backend" to have the value "oss". They you restart firefox. --HPS
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