Now with
On 13/09/2020 10:24, Hans Petter Selasky wrote:
On 2020-09-13 11:21, Graham Perrin wrote:
1. Chromium simply does not play AV content e.g.
<https://www.ted.com/talks/james_geary_metaphorically_speaking> –
after a click to play, there's a moment of visual motion but no playback
2. if Firefox media.cubeb.backend set to oss then behaviour is the
same as Chromium
3. if Firefox media.cubeb.backend is not set (audio backend defaults
to pulse-rust) then playback occurs through IDT 92HD81B1X (Analog) –
not USB.
Try to configure a smaller audio buffer size in virtual_oss .
Sometimes devices request a very small audio buffer .
--HPS
Now with virtual_oss and sndiod disabled (starting them when required
with onestart), with the buffer size reduced from 1024 to 256,
----
root@momh167-gjp4-8570p:~ # head -n 55 /usr/local/etc/rc.d/virtual_oss |
grep -v \#
. /etc/rc.subr
name=virtual_oss
desc="Virtual OSS device manager"
rcvar=${name}_enable
start_precmd="${name}_precmd"
start_cmd="${name}_start"
stop_cmd="${name}_stop"
virtual_oss_default_args="\
-T /dev/sndstat \
-S \
-i 8 \
-C 2 -c 2 \
-r 48000 \
-b 24 \
-s 256 \
-f /dev/dsp0 \
-c 2 \
-d dsp \
-t dsp.ctl"
configs=
load_rc_config $name
root@momh167-gjp4-8570p:~ # service virtual_oss onestart ; service
sndiod onestart ; service virtual_oss onestatus ; service sndiod
onestatus ; cat /dev/sndstat
Starting Virtual OSS config dsp ... done
Starting sndiod.
virtual_oss is running as pid 5990.
sndiod is running as pid 6006.
Installed devices:
pcm0: <ATI R6xx (HDMI)> (play) default
pcm1: <IDT 92HD81B1X (Analog 2.0+HP/2.0)> (play/rec)
pcm2: <IDT 92HD81B1X (Analog)> (play/rec)
pcm3: <USB audio> (rec)
pcm4: <USB audio> (play/rec)
No devices installed from userspace.
root@momh167-gjp4-8570p:~ #
----
I get visual playback but nothing audible at the USB headset or analogue
loudspeakers.
I see device buffer sizes below but I don't know how to use those to
determine a usable setting for -s in /usr/local/etc/rc.d/virtual_oss
From dmesg :
----
ugen0.5: <Alctron USB700 Alctron USB700> at usbus0
uhid1 on uhub2
uhid1: <Alctron USB700 Alctron USB700, class 0/0, rev 1.10/1.00, addr 4>
on usbus0
uaudio0 on uhub2
uaudio0: <Alctron USB700 Alctron USB700, class 0/0, rev 1.10/1.00, addr
4> on usbus0
uaudio0: No playback.
uaudio0: Record[0]: 48000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 44100 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 32000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 22050 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 16000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 11025 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: Record[0]: 8000 Hz, 1 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio0: No MIDI sequencer.
pcm3: <USB audio> on uaudio0
uaudio0: No HID volume keys found.
ugen0.6: <vendor 0x0424 product 0x2514> at usbus0
uhub8 on uhub2
uhub8: <vendor 0x0424 product 0x2514, class 9/0, rev 2.00/b.b3, addr 5>
on usbus0
uhub8: MTT enabled
uhub8: 4 ports with 4 removable, self powered
ugen0.7: <SteelSeries SteelSeries Siberia 350> at usbus0
uaudio1 on uhub8
uaudio1: <SteelSeries SteelSeries Siberia 350, class 0/0, rev 1.10/2.08,
addr 6> on usbus0
uaudio1: Play[0]: 48000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 44100 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 22050 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 11025 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Play[0]: 8000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Record[0]: 48000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Record[0]: 44100 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Record[0]: 22050 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Record[0]: 16000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Record[0]: 11025 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: Record[0]: 8000 Hz, 2 ch, 16-bit S-LE PCM format, 2x8ms buffer.
uaudio1: No MIDI sequencer.
pcm4: <USB audio> on uaudio1
uaudio1: HID volume keys found.
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