最終更新:2024-11-30 (土) 03:07:51 (218d)
arecord
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command-line sound recorder and player for ALSA soundcard driver
arecord [flags] [filename]
概要
- arecord is a command-line soundfile recorder for the ALSA soundcard driver.
- It supports several file formats and multiple soundcards with multiple devices.
- If recording with interleaved mode samples the file is auto‐matically split before the 2GB filesize.
ソースコード (aplayと同じ)
フォーマット
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
ショートカット
-f cd 16 bit little endian, 44100, stereo -f S16_LE -c2 -r44100 -f cdr 16 bit big endian, 44100, stereo -f S16_BE -c2 -f44100 -f dat 16 bit little endian, 48000, stereo -f S16_LE -c2 -r48000
パラメータ
-D, --device=NAME Select PCM by name -f --format=FORMAT Sample format -r, --rate=#<Hz> Sampling rate in Hertz. -c, --channels=# The number of channels. -l, --list-devices List all soundcards and digital audio devices -L, --list-pcms List all PCMs defined
man
-F, --period-time=# Distance between interrupts is # microseconds. If no period time and no period size is given then a quarter of the buffer time is set. -B, --buffer-time=# Buffer duration is # microseconds If no buffer time and no buffer size is given then the maximal allowed buffer time but not more than 500ms is set. --period-size=# Distance between interrupts is # frames If no period size and no period time is given then a quarter of the buffer size is set. --buffer-size=# Buffer duration is # frames If no buffer time and no buffer size is given then the maximal allowed buffer time but not more than 500ms is set.
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 -s, --samples=# interrupt after # samples per channel -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 recorded for 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 S20_LE S20_BE U20_LE U20_BE 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)
VirtualBox
user@vm:~$ arecord -l **** List of CAPTURE Hardware Devices **** card 0: I82801AAICH [Intel 82801AA-ICH], device 0: Intel ICH [Intel 82801AA-ICH] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: I82801AAICH [Intel 82801AA-ICH], device 1: Intel ICH - MIC ADC [Intel 82801AA-ICH - MIC ADC] Subdevices: 1/1 Subdevice #0: subdevice #0 user@vm:~$ arecord -L default Playback/recording through the PulseAudio sound server null Discard all samples (playback) or generate zero samples (capture) pulse PulseAudio Sound Server sysdefault:CARD=I82801AAICH Intel 82801AA-ICH, Intel 82801AA-ICH Default Audio Device front:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH Front speakers surround21:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH 2.1 Surround output to Front and Subwoofer speakers surround40:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH 4.0 Surround output to Front and Rear speakers surround41:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH 5.1 Surround output to Front, Center, Rear and Subwoofer speakers iec958:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH IEC958 (S/PDIF) Digital Audio Output dmix:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH Direct sample mixing device dmix:CARD=I82801AAICH,DEV=1 Intel 82801AA-ICH, Intel 82801AA-ICH - MIC ADC Direct sample mixing device dsnoop:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH Direct sample snooping device dsnoop:CARD=I82801AAICH,DEV=1 Intel 82801AA-ICH, Intel 82801AA-ICH - MIC ADC Direct sample snooping device hw:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH Direct hardware device without any conversions hw:CARD=I82801AAICH,DEV=1 Intel 82801AA-ICH, Intel 82801AA-ICH - MIC ADC Direct hardware device without any conversions plughw:CARD=I82801AAICH,DEV=0 Intel 82801AA-ICH, Intel 82801AA-ICH Hardware device with all software conversions plughw:CARD=I82801AAICH,DEV=1 Intel 82801AA-ICH, Intel 82801AA-ICH - MIC ADC Hardware device with all software conversions
