目录
前言
二、选项说明
1.arecord
2.aplay
三、举例
总结
前言
之前为了测试linein功能，用到了arecord和aplay命令，特此记录总结。
一、命令格式
录制音频Usage: arecord [OPTION][FILE]
播放音频Usage: aplay [OPTION][FILE]
二、选项说明
1.arecord
-h, --help help--version print current version
-l, --list-devices list all soundcards and digital audio devices//列出所有声卡和数字音频设备
-L, --list-pcms list device names
-D, --device=NAME select PCM by name//脉冲编码调制（pulse - code modulation）
-q, --quiet quiet mode//安静模式
-t, --file-type TYPE file type (voc, wav, raw or au)//文件类型
-c, --channels=# channels
-f, --format=FORMAT sample format (case insensitive)
-r, --rate=# sample rate//采样率
-d, --duration=# interrupt after # seconds//设置间隔时间单位为秒
-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
-m, --chmap=ch1,ch2,.. Give the channel map to override or follow--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 recordedfor this many seconds--process-id-file write the process ID here--use-strftime apply the strftime facility to the output file name--dump-hw-params dump hw_params of the device--fatal-errors treat all errors as fatal
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 U18_3BE G723_24 G723_24_1B G723_40 G723_40_1B DSD_U8 DSD_U16_LE DSD_U32_LE DSD_U16_BE DSD_U32_BE
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)
2.aplay
-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
-m, --chmap=ch1,ch2,.. Give the channel map to override or follow--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 recordedfor this many seconds--process-id-file write the process ID here--use-strftime apply the strftime facility to the output file name--dump-hw-params dump hw_params of the device--fatal-errors treat all errors as fatal
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 U18_3BE G723_24 G723_24_1B G723_40 G723_40_1B DSD_U8 DSD_U16_LE DSD_U32_LE DSD_U16_BE DSD_U32_BE
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)
三、举例
arecord test.wav -d 10aplay test.wav总结
以后有空再添加相关内容。