Re: [Alsa-user] How to record audio from a live video (youtube via firefox) ?
Hi,
ok...it works now...somehow...incompletly...so to say
My $HOME/.asoundrc looks like this:
# default device
pcm.!default {
type plug
slave.pcm "loop"
}
# output device
pcm.loopout {
type dmix
ipc_key 328211
slave.pcm "hw:Loopback,0,0"
}
# input device
pcm.loopin {
type dsnoop
ipc_key 686592
slave.pcm "hw:Loopback,1,0"
}
# duplex plug device
pcm.loop {
type plug
slave {
pcm {
type asym
playback.pcm "loopout"
capture.pcm "loopin"
}
}
}
When start firefox and play a video, I can here nothing until I do
this at the commandline:
arecord -f cd -D loop | aplay -f cd -D hw:0,0
The same line can be adapted for recording:
arecord -f cd -D loop .wav
While recording, I can here nothing and vice versa.
It would be nice, if it would be possible, that audio is audible
(that's audio is for :) ) without any actions from my side
(commandline and such) and recording could be done from a device.
That way, screencast software could use this device for recording.
Cheers!
mcc
On 12/27 08:22, tu...@posteo.de wrote:
> Hi,
>
> this looks interesting:
> http://www.pogo.org.uk/~mark/trx/streaming-desktop-audio.html
>
> ...but still not the solution.
>
> The alsaloop command works fine...so the redirection works.
>
> But I can't record anything still.
>
> Cheers!
> mcc
>
>
>
> On 12/27 10:47, Robert M. Riches Jr. wrote:
> > (Apologies if you want reply to list without also a direct reply.
> > My mail client has 'reply' and 'Reply' only.)
> >
> > I am also using pure ALSA. After a little web searching a few
> > days ago, I came up with this .asoundrc file that records to a
> > raw file:
> >
> > v cut here v
> > pcm.Intel { type hw; card Intel; }
> > ctl.Intel { type hw; card Intel; }
> > pcm.NVidia { type hw; card NVidia; }
> > ctl.NVidia { type hw; card NVidia; }
> >
> > pcm.rate48000Hz {
> > type rate
> > slave {
> > pcm writeFile # Direct to the plugin which will write to a file
> > format S16_LE
> > # channels 2
> > rate 48000
> > }
> > #route_policy copy
> > }
> >
> > pcm.writeFile {
> > type file
> > slave {
> > pcm "Intel" # Now write to the actual sound card
> > }
> > file "aplay-D_card0-t_raw-f_S16_LE-r48000-c_2.raw"
> > format "raw"
> > }
> >
> > pcm.!default {
> > type plug
> > slave.pcm "rate48000Hz"
> > }
> > ctl.!default ctl.Intel
> > ^ cut here ^
> >
> > Caution: Some web browsers take liberties with how they deal with
> > sound. For example, some years ago, Firefox Hello (video chat)
> > would work only with very specific .asoundrc content.
> >
> > Changing the sample rate may or may not work. With Musescore, I
> > had to use exactly 48000, not 44100.
> >
> > Here are example commands for converting to WAV and then to MP3:
> >
> > Convert it to WAV:
> >
> > sox -r 48k -e signed -b 16 -c 2 \
> > aplay-D_card0-t_raw-f_S16_LE-r48000-c_2.raw \
> > -r 44100 something.wav
> >
> > Crop it as needed.
> >
> > Optional: Convert it to MP3:
> >
> > ffmpeg -i something.wav something.mp3
> >
> > HTH
> >
> > Robert
> >
> >
> >
> > > Date: Sun, 27 Dec 2020 10:25:14 +0100
> > > From: tu...@posteo.de
> > > To: alsa-user@lists.sourceforge.net
> > >
> > > Hi,
> > >
> > > I want to record the audio of a live stream video (youtube).
> > >
> > > Everything I tried resulted in audio files with constant or
> > > intermitted sine wave like sounds.
> > >
> > > I am using pure alsa. I don't want pulseaudio and with jack
> > > started firefoxs audio does not work.
> > >
> > > How can I accomplish this recording task successfully ?
> > >
> > > My setup:
> > >
> > > GENTOO Linux
> > > External USB audio DAC (FIIO Olympus 2)
> > >
> > > No $HOME/.asoundrc
> > > /etc/conf.d/alsasound:
> > >
> > ># RESTORE_ON_START:
> > ># Do you want to restore your mixer settings? If not, your cards will
> > > be
> > ># muted.
> > ># no - Do not restore state
> > ># yes - Restore state
> > >
> > >RESTORE_ON_START="yes"
> > >
> > ># SAVE_ON_STOP:
> > ># Do you want to save changes made to your mixer volumes when alsasound
> > ># stops?
> > ># no - Do not save state
> > ># yes - Save state
> > >
> > >SAVE_ON_STOP="yes"
> > >
> > > arecord -l:
> > >
> > > List of CAPTURE Hardware Devices
> > > card 0: Audio [DigiHug USB Audio], device 0: USB Audio [USB Audio]
> > > Subdevices: 1/1
> > > Subdevice #0: subdevice #0
> > >
> > >
> > > arecord -L:
> > > null
> > > Discard all samples (playback) or generate zero samples (capture)
> > > default
> > > Default Audio Device
> > > sysdefault
> > > Default Audio Device
> > > lavrate
> > > Rate Converter Plugin Using Libav/FFmpeg Library
> > > upmix
> > > Plugin for channel
Re: [Alsa-user] How to record audio from a live video (youtube via firefox) ?
Hi,
this looks interesting:
http://www.pogo.org.uk/~mark/trx/streaming-desktop-audio.html
...but still not the solution.
The alsaloop command works fine...so the redirection works.
But I can't record anything still.
Cheers!
mcc
On 12/27 10:47, Robert M. Riches Jr. wrote:
> (Apologies if you want reply to list without also a direct reply.
> My mail client has 'reply' and 'Reply' only.)
>
> I am also using pure ALSA. After a little web searching a few
> days ago, I came up with this .asoundrc file that records to a
> raw file:
>
> v cut here v
> pcm.Intel { type hw; card Intel; }
> ctl.Intel { type hw; card Intel; }
> pcm.NVidia { type hw; card NVidia; }
> ctl.NVidia { type hw; card NVidia; }
>
> pcm.rate48000Hz {
> type rate
> slave {
> pcm writeFile # Direct to the plugin which will write to a file
> format S16_LE
> # channels 2
> rate 48000
> }
> #route_policy copy
> }
>
> pcm.writeFile {
> type file
> slave {
> pcm "Intel" # Now write to the actual sound card
> }
> file "aplay-D_card0-t_raw-f_S16_LE-r48000-c_2.raw"
> format "raw"
> }
>
> pcm.!default {
> type plug
> slave.pcm "rate48000Hz"
> }
> ctl.!default ctl.Intel
> ^ cut here ^
>
> Caution: Some web browsers take liberties with how they deal with
> sound. For example, some years ago, Firefox Hello (video chat)
> would work only with very specific .asoundrc content.
>
> Changing the sample rate may or may not work. With Musescore, I
> had to use exactly 48000, not 44100.
>
> Here are example commands for converting to WAV and then to MP3:
>
> Convert it to WAV:
>
> sox -r 48k -e signed -b 16 -c 2 \
> aplay-D_card0-t_raw-f_S16_LE-r48000-c_2.raw \
> -r 44100 something.wav
>
> Crop it as needed.
>
> Optional: Convert it to MP3:
>
> ffmpeg -i something.wav something.mp3
>
> HTH
>
> Robert
>
>
>
> > Date: Sun, 27 Dec 2020 10:25:14 +0100
> > From: tu...@posteo.de
> > To: alsa-user@lists.sourceforge.net
> >
> > Hi,
> >
> > I want to record the audio of a live stream video (youtube).
> >
> > Everything I tried resulted in audio files with constant or
> > intermitted sine wave like sounds.
> >
> > I am using pure alsa. I don't want pulseaudio and with jack
> > started firefoxs audio does not work.
> >
> > How can I accomplish this recording task successfully ?
> >
> > My setup:
> >
> > GENTOO Linux
> > External USB audio DAC (FIIO Olympus 2)
> >
> > No $HOME/.asoundrc
> > /etc/conf.d/alsasound:
> >
> ># RESTORE_ON_START:
> ># Do you want to restore your mixer settings? If not, your cards will be
> ># muted.
> ># no - Do not restore state
> ># yes - Restore state
> >
> >RESTORE_ON_START="yes"
> >
> ># SAVE_ON_STOP:
> ># Do you want to save changes made to your mixer volumes when alsasound
> ># stops?
> ># no - Do not save state
> ># yes - Save state
> >
> >SAVE_ON_STOP="yes"
> >
> > arecord -l:
> >
> > List of CAPTURE Hardware Devices
> > card 0: Audio [DigiHug USB Audio], device 0: USB Audio [USB Audio]
> > Subdevices: 1/1
> > Subdevice #0: subdevice #0
> >
> >
> > arecord -L:
> > null
> > Discard all samples (playback) or generate zero samples (capture)
> > default
> > Default Audio Device
> > sysdefault
> > Default Audio Device
> > lavrate
> > Rate Converter Plugin Using Libav/FFmpeg Library
> > upmix
> > Plugin for channel upmix (4,6,8)
> > vdownmix
> > Plugin for channel downmix (stereo) with a simple spacialization
> > default:CARD=Audio
> > DigiHug USB Audio, USB Audio
> > Default Audio Device
> > sysdefault:CARD=Audio
> > DigiHug USB Audio, USB Audio
> > Default Audio Device
> > front:CARD=Audio,DEV=0
> > DigiHug USB Audio, USB Audio
> > Front output / input
> > usbstream:CARD=Audio
> > DigiHug USB Audio
> > USB Stream Output
> >
> > aplay -l:
> > List of PLAYBACK Hardware Devices
> > card 0: Audio [DigiHug USB Audio], device 0: USB Audio [USB Audio]
> > Subdevices: 1/1
> > Subdevice #0: subdevice #0
> > card 0: Audio [DigiHug USB Audio], device 1: USB Audio [USB Audio #1]
> > Subdevices: 1/1
> > Subdevice #0: subdevice #0
> >
> > lsusb -v (excerpt):
> >
> > Bus 005 Device 002: ID 1852:7022 GYROCOM C Co., LTD Fiio E10
> > Device Descriptor:
> > bLength18
> > bDescriptorType 1
> > bcdUSB 1.10
> > bDeviceClass0
> > bDeviceSubClass 0
> > bDeviceProtocol 0
> > bMaxPacketSize0 8
> > idVendor 0x1852 GYROCOM C Co., LTD
> > idProduct 0x7022 Fiio E10
> > bcdDevice0.01
> > iManufacturer 1 FiiO
> > iProduct2 DigiHug USB Audio
> > iSerial 0
> > bNumConfigurations 1
> >
Re: [Alsa-user] How to record audio from a live video (youtube via firefox) ?
On 12/27 10:47, Robert M. Riches Jr. wrote:
Hi Robert,
thanks a lot for your reply!
This seems to record as soon as .asoundrc is "active". In my case,
this isn't exactly what I am trying to acchieve.
After I posted my initial question I finally found something, which
may be kinda solutionif it would work ;)
It seems, that with the kernel module snd_aloop and the command
alsaloop one is able to create a "copy" of the existing soundcard
in a way, that what goes into the real soundcard (the sound, firefox
creates) can be recorded from the loopback device.
But until now I can't get this working.
The .asoundrc so far looks like this (with the setup/hardware listed
in my initial posting):
# .asoundrc
pcm.multi {
type route;
slave.pcm {
type multi;
slaves.a.pcm "output";
slaves.b.pcm "loopin";
slaves.a.channels 2;
slaves.b.channels 2;
bindings.0.slave a;
bindings.0.channel 0;
bindings.1.slave a;
bindings.1.channel 1;
bindings.2.slave b;
bindings.2.channel 0;
bindings.3.slave b;
bindings.3.channel 1;
}
ttable.0.0 1;
ttable.1.1 1;
ttable.0.2 1;
ttable.1.3 1;
}
pcm.!default {
type plug
slave.pcm "multi"
}
pcm.output {
type hw
card 0
}
pcm.loopin {
type plug
slave.pcm "hw:Loopback,0,0"
}
pcm.loopout {
type plug
slave.pcm "hw:Loopback,1,0"
}
(this is copied from the web mainlu)
But - as mentioned - this does not work currently. The recorded audio
(arecord) produces an "The Sound of Silence"... ;)
But may be this is a starting point ... I am still at the very
beginning of all this it seems...
Cheers!
Meino
> (Apologies if you want reply to list without also a direct reply.
> My mail client has 'reply' and 'Reply' only.)
>
> I am also using pure ALSA. After a little web searching a few
> days ago, I came up with this .asoundrc file that records to a
> raw file:
>
> v cut here v
> pcm.Intel { type hw; card Intel; }
> ctl.Intel { type hw; card Intel; }
> pcm.NVidia { type hw; card NVidia; }
> ctl.NVidia { type hw; card NVidia; }
>
> pcm.rate48000Hz {
> type rate
> slave {
> pcm writeFile # Direct to the plugin which will write to a file
> format S16_LE
> # channels 2
> rate 48000
> }
> #route_policy copy
> }
>
> pcm.writeFile {
> type file
> slave {
> pcm "Intel" # Now write to the actual sound card
> }
> file "aplay-D_card0-t_raw-f_S16_LE-r48000-c_2.raw"
> format "raw"
> }
>
> pcm.!default {
> type plug
> slave.pcm "rate48000Hz"
> }
> ctl.!default ctl.Intel
> ^ cut here ^
>
> Caution: Some web browsers take liberties with how they deal with
> sound. For example, some years ago, Firefox Hello (video chat)
> would work only with very specific .asoundrc content.
>
> Changing the sample rate may or may not work. With Musescore, I
> had to use exactly 48000, not 44100.
>
> Here are example commands for converting to WAV and then to MP3:
>
> Convert it to WAV:
>
> sox -r 48k -e signed -b 16 -c 2 \
> aplay-D_card0-t_raw-f_S16_LE-r48000-c_2.raw \
> -r 44100 something.wav
>
> Crop it as needed.
>
> Optional: Convert it to MP3:
>
> ffmpeg -i something.wav something.mp3
>
> HTH
>
> Robert
>
>
>
> > Date: Sun, 27 Dec 2020 10:25:14 +0100
> > From: tu...@posteo.de
> > To: alsa-user@lists.sourceforge.net
> >
> > Hi,
> >
> > I want to record the audio of a live stream video (youtube).
> >
> > Everything I tried resulted in audio files with constant or
> > intermitted sine wave like sounds.
> >
> > I am using pure alsa. I don't want pulseaudio and with jack
> > started firefoxs audio does not work.
> >
> > How can I accomplish this recording task successfully ?
> >
> > My setup:
> >
> > GENTOO Linux
> > External USB audio DAC (FIIO Olympus 2)
> >
> > No $HOME/.asoundrc
> > /etc/conf.d/alsasound:
> >
> ># RESTORE_ON_START:
> ># Do you want to restore your mixer settings? If not, your cards will be
> ># muted.
> ># no - Do not restore state
> ># yes - Restore state
> >
> >RESTORE_ON_START="yes"
> >
> ># SAVE_ON_STOP:
> ># Do you want to save changes made to your mixer volumes when alsasound
> ># stops?
> ># no - Do not save state
> ># yes - Save state
> >
> >SAVE_ON_STOP="yes"
> >
> > arecord -l:
> >
> > List of CAPTURE Hardware Devices
> > card 0: Audio [DigiHug USB Audio], device 0: USB Audio [USB Audio]
> > Subdevices: 1/1
> > Subdevice #0: subdevice #0
> >
> >
> > arecord -L:
> > null
> > Discard all samples (playback) or generate zero samples (capture)
> > default
> > Default Audio Device
> > sysdefault
> > Default Audio Device
> > lavrate
> > Rate Converter Plugin
[Alsa-user] How to record audio from a live video (youtube via firefox) ?
Hi, I want to record the audio of a live stream video (youtube). Everything I tried resulted in audio files with constant or intermitted sine wave like sounds. I am using pure alsa. I don't want pulseaudio and with jack started firefoxs audio does not work. How can I accomplish this recording task successfully ? My setup: GENTOO Linux External USB audio DAC (FIIO Olympus 2) No $HOME/.asoundrc /etc/conf.d/alsasound: # RESTORE_ON_START: # Do you want to restore your mixer settings? If not, your cards will be # muted. # no - Do not restore state # yes - Restore state RESTORE_ON_START="yes" # SAVE_ON_STOP: # Do you want to save changes made to your mixer volumes when alsasound # stops? # no - Do not save state # yes - Save state SAVE_ON_STOP="yes" arecord -l: List of CAPTURE Hardware Devices card 0: Audio [DigiHug USB Audio], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 arecord -L: null Discard all samples (playback) or generate zero samples (capture) default Default Audio Device sysdefault Default Audio Device lavrate Rate Converter Plugin Using Libav/FFmpeg Library upmix Plugin for channel upmix (4,6,8) vdownmix Plugin for channel downmix (stereo) with a simple spacialization default:CARD=Audio DigiHug USB Audio, USB Audio Default Audio Device sysdefault:CARD=Audio DigiHug USB Audio, USB Audio Default Audio Device front:CARD=Audio,DEV=0 DigiHug USB Audio, USB Audio Front output / input usbstream:CARD=Audio DigiHug USB Audio USB Stream Output aplay -l: List of PLAYBACK Hardware Devices card 0: Audio [DigiHug USB Audio], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: Audio [DigiHug USB Audio], device 1: USB Audio [USB Audio #1] Subdevices: 1/1 Subdevice #0: subdevice #0 lsusb -v (excerpt): Bus 005 Device 002: ID 1852:7022 GYROCOM C Co., LTD Fiio E10 Device Descriptor: bLength18 bDescriptorType 1 bcdUSB 1.10 bDeviceClass0 bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x1852 GYROCOM C Co., LTD idProduct 0x7022 Fiio E10 bcdDevice0.01 iManufacturer 1 FiiO iProduct2 DigiHug USB Audio iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 0x0182 bNumInterfaces 4 bConfigurationValue 1 iConfiguration 0 bmAttributes 0x80 (Bus Powered) MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber0 bAlternateSetting 0 bNumEndpoints 1 bInterfaceClass 3 Human Interface Device bInterfaceSubClass 0 bInterfaceProtocol 0 iInterface 0 HID Device Descriptor: bLength 9 bDescriptorType33 bcdHID 1.00 bCountryCode0 Not supported bNumDescriptors 1 bDescriptorType34 Report wDescriptorLength 58 Report Descriptors: ** UNAVAILABLE ** Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes3 Transfer TypeInterrupt Synch Type None Usage Type Data wMaxPacketSize 0x0012 1x 18 bytes bInterval 32 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber1 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 1 Audio bInterfaceSubClass 1 Control Device bInterfaceProtocol 0 iInterface 3 FiiO USB DAC-E10 AudioControl Interface Descriptor: bLength10 bDescriptorType36 bDescriptorSubtype 1 (HEADER) bcdADC 1.00 wTotalLength 0x003e bInCollection 2 baInterfaceNr(0)2 baInterfaceNr(1)3 AudioControl Interface Descriptor: bLength12 bDescriptorType36 bDescriptorSubtype 2 (INPUT_TERMINAL) bTerminalID 5 wTerminalType 0x0605 SPDIF interface bAssocTerminal 0 bNrChannels 2 wChannelConfig 0x0003 Left Front (L) Right Front (R) iChannelNames 0 iTerminal 0
[Alsa-user] DSP-Equalizser available ?
Hi, I have added a simple DAC to my PC, which provides a digital to anaolog conversion only - there are no further soundcard-like functionality available. Now I am looking for an equaliser which works with alsa, does not need jack or pulseaudio or portaudio and does the equalisation by itsself - just like a DSP. But I didn't find any. Is there such a software available, which I can run in background as kinda "default equaliser" for all audio sources? Thanks a lot for any help in advance! Cheers! Meino ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
