palmer
Guru
Joined: 17 Nov 2004
Posts: 322
Location: Berkeley, CA
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 Posted: Fri Sep 18, 2015 5:01 am Post subject: arecord doesn't output data when recording from pulseaudio |
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No programs that record audio work when pulseaudio is running on my system. Audio playback is fine. When I try to record audio using arecord, I get a WAV header and then no more data gets output:
| Code: | $ arecord -f cd
Recording WAVE 'stdin' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
RIFF$WAVEfmt D±data
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I can record on the same setup if I use ALSA to record (by first removing my card's module-load from pulseaudio's configuration file and then killing pulseaudio to release the device):
| Code: | $ arecord -D sysdefault:CARD=Alpha -f cd
... lots of data ...
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The odd thing is that pulseaudio seems to think that it's recording something: I see the source turned on in "pactl list"
| Code: | Source #1
State: RUNNING
Name: alsa_input.Alpha.analog-mono
Description: Headphones
Driver: module-alsa-card.c
Sample Specification: s16le 1ch 44100Hz
Channel Map: mono
Owner Module: 2
Mute: no
Volume: mono: 58409 / 89% / -3.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor of Sink: n/a
Latency: 241163152 usec, configured 99954 usec
Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY
Properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "USB Audio"
alsa.id = "USB Audio"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "3"
alsa.card_name = "Sound Blaster Tactic(3D) Alpha"
alsa.long_card_name = "Creative Technology Ltd Sound Blaster Tactic(3D) Alpha at usb-0000:00:1d.0-1.1."
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:1d.0-usb-0:1.1.1:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:1d.0/usb1/1-1/1-1.1/1-1.1.1/1-1.1.1:1.0/sound/card3"
udev.id = "usb-Creative_Technology_Ltd_Sound_Blaster_Tactic_3D__Alpha_00168190-00-Alpha"
device.bus = "usb"
device.vendor.id = "041e"
device.vendor.name = "Creative Technology, Ltd"
device.product.id = "30dc"
device.product.name = "Sound Blaster Tactic(3D) Alpha"
device.serial = "Creative_Technology_Ltd_Sound_Blaster_Tactic_3D__Alpha_00168190"
device.string = "hw:Alpha"
device.buffering.buffer_size = "8816"
device.buffering.fragment_size = "2204"
device.access_mode = "mmap"
device.profile.name = "analog-mono"
device.profile.description = "Analog Mono"
device.description = "Headphones"
alsa.mixer_name = "USB Mixer"
alsa.components = "USB041e:30dc"
device.icon_name = "audio-card-usb"
Ports:
analog-input-mic: Microphone (priority: 8700)
Active Port: analog-input-mic
Formats:
pcm
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and I see "pulseaudio -vv" show some output that seems to indicate that it's recognized the stream
| Code: | I: [pulseaudio] main.c: Daemon startup complete.
I: [pulseaudio] client.c: Created 0 "Native client (UNIX socket client)"
I: [pulseaudio] client.c: Freed 0 "Native client (UNIX socket client)"
I: [pulseaudio] protocol-native.c: Connection died.
I: [pulseaudio] client.c: Created 1 "Native client (UNIX socket client)"
I: [pulseaudio] protocol-native.c: Got credentials: uid=1000 gid=1000 success=1
I: [pulseaudio] module-stream-restore.c: Restoring device for stream source-output-by-application-name:ALSA plug-in [aplay].
I: [pulseaudio] source-output.c: Trying to change sample rate
I: [pulseaudio] source-output.c: Rate changed to 44100 Hz
I: [pulseaudio] resampler.c: Forcing resampler 'copy', because of fixed, identical sample rates.
I: [pulseaudio] remap_sse.c: Using SSE2 mono to stereo remapping
I: [pulseaudio] source-output.c: Created output 0 "ALSA Capture" on alsa_input.Alpha.analog-mono with sample spec s16le 2ch 44100Hz and channel map front-left,front-right
I: [pulseaudio] source-output.c: media.name = "ALSA Capture"
I: [pulseaudio] source-output.c: application.name = "ALSA plug-in [aplay]"
I: [pulseaudio] source-output.c: native-protocol.peer = "UNIX socket client"
I: [pulseaudio] source-output.c: native-protocol.version = "29"
I: [pulseaudio] source-output.c: application.process.id = "12136"
I: [pulseaudio] source-output.c: application.process.user = "palmer"
I: [pulseaudio] source-output.c: application.process.host = "palmer-audio-desk"
I: [pulseaudio] source-output.c: application.process.binary = "aplay"
I: [pulseaudio] source-output.c: application.language = "en_US.utf8"
I: [pulseaudio] source-output.c: application.process.machine_id = "01912b365e4658f963ed1d8b55edb69e"
I: [pulseaudio] source-output.c: module-stream-restore.id = "source-output-by-application-name:ALSA plug-in [aplay]"
I: [pulseaudio] protocol-native.c: Final latency 199.88 ms = 99.93 ms + 99.95 ms
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In "pavucontrol" I don't see the blue bars under the recording volume control at all.
If I change pulseaudio to record from a monitor then arecord outputs data. |
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