Cubian下如何支持USB摄像头自带的自带声卡。录音教程

zixi0007 · 发表于 2014-9-16 08:49:51

本帖最后由 zixi0007 于 2014-9-16 10:05 编辑

Cubian下如何支持USB摄像头自带的自带声卡。

root@Cubian:~# ls /dev/
ace_dev       log_main          ram0    tty23  tty5 ump
autofs          log_radio          ram1    tty24  tty50 urandom
avs_dev       log_system       random    tty25  tty51 usbdev1.1
binder          loop0             rfkill    tty26  tty52 usbdev1.2
block          loop1             root    tty27  tty53 usbdev2.1
btrfs-control loop2             rtc0    tty28  tty54 usbdev3.1
bus             loop3             shm       tty29  tty55 usbdev4.1
cachefiles    loop4             snd       tty3 tty56 v4l
cedar_dev       loop5             stderr    tty30  tty57 vcs
char          loop6             stdin    tty31  tty58 vcs1
console       loop7             stdout    tty32  tty59 vcs2
cpu_dma_latency  loop-control       sunxi-lcd  tty33  tty6 vcs3
cuse          MAKEDEV          tty       tty34  tty60 vcs4
disk          mali             tty0    tty35  tty61 vcs5
disp          mapper             tty1    tty36  tty62 vcs6
fb0             md0                tty10    tty37  tty63 vcsa
fb1             media0             tty11    tty38  tty7 vcsa1
fd             mem                tty12    tty39  tty8 vcsa2
full          nand             tty13    tty4 tty9 vcsa3
fuse          nanda             tty14    tty40  ttyS0 vcsa4
g2d             nandb             tty15    tty41  ttyS1 vcsa5
i2c-0          net                tty16    tty42  ttyS2 vcsa6
i2c-1          network_latency    tty17    tty43  ttyS3 video0
i2c-2          network_throughput  tty18    tty44  ttyS4 xconsole
i2c-3          null             tty19    tty45  ttyS5 zero
input          pa_dev             tty2    tty46  ttyS6
kmsg          ppp                tty20    tty47  ttyS7
log             ptmx             tty21    tty48  uhid
log_events    pts                tty22    tty49  uinput

//查看声卡
root@Cubian:~# ls -l /dev/snd/
total 0
drwxr-xr-x 2 root root    60 Jan  1  2010 by-id
drwxr-xr-x 2 root root    80 Jan  1  2010 by-path
crw-rw---T 1 root audio 116,  0 Jan  1  2010 controlC0
crw-rw---T 1 root audio 116, 32 Jan  1  2010 controlC1
crw-rw---T 1 root audio 116, 24 Jan  1  2010 pcmC0D0c
crw-rw---T 1 root audio 116, 16 Jan  1  2010 pcmC0D0p
crw-rw---T 1 root audio 116, 56 Jan  1  2010 pcmC1D0c
crw-rw---T 1 root audio 116,  1 Jan  1  2010 seq
crw-rw---T 1 root audio 116, 33 Jan  1  2010 timer

//显示录音设备
root@Cubian:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sunxicodec [sunxi-CODEC], device 0: M1 PCM [sunxi PCM]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

//查看声卡
root@Cubian:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: sunxicodec [sunxi-CODEC], device 0: M1 PCM [sunxi PCM]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: USB20Camera [USB2.0_Camera], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

//录音命令使用板载声卡
root@Cubian:~# arecord -d 10 -D plughw:0 0.wav
Recording WAVE '0.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
root@Cubian:~# ls
0.wav  nand_mbr.backup
root@Cubian:~# pwd
/root

//录音命令使用USB声卡
root@Cubian:~# arecord -d 10 -D plughw:1 0.wav
Recording WAVE '0.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono

//调音
root@Cubian:~# alsamixer

问题是USB声卡录音都是造成也不能调节混音。

lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq AlsaMixer v1.0.25 qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk
x Card: USB2.0_Camera F1: Help x
x Chip: USB Mixer F2: System information x
x View: F3:[Playback] F4: Capture F5: All F6: Select sound card x
x Item: Esc: Exit x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x This sound device does not have any playback controls. x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
x x
mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq

复制代码

板载的声卡可以调节

zixi0007 · 发表于 2014-9-16 10:48:49

目前就是声卡录音有噪声的问题不能解决
声音文件如下：

命令详解，什么静音模式之类的全用了，还是有噪声。
cubie@Cubian:/download$ arecord --help
Usage: arecord [OPTION]... [FILE]...

-h, --help             help
--version          print current version
-l, --list-devices    list all soundcards and digital audio devices
-L, --list-pcms       list device names
-D, --device=NAME    select PCM by name
-q, --quiet          quiet mode
-t, --file-type TYPE file type (voc, wav, raw or au)
-c, --channels=#       channels
-f, --format=FORMAT    sample format (case insensitive)
-r, --rate=#          sample rate
-d, --duration=#       interrupt after # seconds
-M, --mmap             mmap stream
-N, --nonblock       nonblocking mode
-F, --period-time=#    distance between interrupts is # microseconds
-B, --buffer-time=#    buffer duration is # microseconds
--period-size=#    distance between interrupts is # frames
--buffer-size=#    buffer duration is # frames
-A, --avail-min=#    min available space for wakeup is # microseconds
-R, --start-delay=#    delay for automatic PCM start is # microseconds
                     (relative to buffer size if <= 0)
-T, --stop-delay=#    delay for automatic PCM stop is # microseconds from xrun
-v, --verbose          show PCM structure and setup (accumulative)
-V, --vumeter=TYPE    enable VU meter (TYPE: mono or stereo)
-I, --separate-channels one file for each channel
-i, --interactive    allow interactive operation from stdin
--disable-resample  disable automatic rate resample
--disable-channels  disable automatic channel conversions
--disable-format disable automatic format conversions
--disable-softvol disable software volume control (softvol)
--test-position    test ring buffer position
--test-coef=#    test coefficient for ring buffer position (default 8)
                     expression for validation is: coef * (buffer_size / 2)
--test-nowait    do not wait for ring buffer - eats whole CPU
--max-file-time=# start another output file when the old file has recorded
                     for this many seconds
--process-id-file write the process ID here
--use-strftime    apply the strftime facility to the output file name
Recognized sample formats are: S8 U8 S16_LE S16_BE U16_LE U16_BE S24_LE S24_BE

U24_LE U24_BE S32_LE S32_BE U32_LE U32_BE FLOAT_LE FLOAT_BE FLOAT64_LE

FLOAT64_BE IEC958_SUBFRAME_LE IEC958_SUBFRAME_BE MU_LAW A_LAW IMA_ADPCM

MPEG GSM SPECIAL S24_3LE S24_3BE U24_3LE U24_3BE S20_3LE S20_3BE U20_3LE

U20_3BE S18_3LE S18_3BE U18_3LE
Some of these may not be available on selected hardware
The available format shortcuts are:
-f cd (16 bit little endian, 44100, stereo)
-f cdr (16 bit big endian, 44100, stereo)
-f dat (16 bit little endian, 48000, stereo)

joyhope · 发表于 2014-9-17 11:16:58

先mark 一下，扳子的录音功能还真没有用过。

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Cubian下如何支持USB摄像头自带的自带声卡。录音教程

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