search

Elecrow-RD / CrowPi2

60 stars 14 forks source link

Typos on Python Lesson #33

Open kensuke opened 3 years ago

kensuke commented 3 years ago

I found 6 error on Python Lesson.

kensuke commented 3 years ago
  1. Recording using the microphone 
    $ arecord --device=hw:1,0 --format S16_LE -c 2 -r 48000 -d 10 /home/pi/Videos/test.wav
Recording WAVE '/home/pi/Videos/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
arecord: set_params:1345: Channels count non available

I don't know correct fix, so let's try duty fix.

$ arecord --device=hw:1,0 --format S16_LE -c 1 -r 48000 -d 10 /home/pi/Videos/test.wav
kensuke commented 3 years ago

  1. Voice recognition to speech AND Weather voice recognition Install component.

    $ sudo apt-get install flac

    for this error.

    Please speak:
Traceback (most recent call last):
File "voice_recognition_to_speech.py", line 52, in <module>

said_text = r.recognize_google(audio)
File "/usr/local/lib/python3.7/dist-packages/speech_recognition/__init__.py", line 828, in recognize_google
convert_width=2  # audio samples must be 16-bit
File "/usr/local/lib/python3.7/dist-packages/speech_recognition/__init__.py", line 445, in get_flac_data
flac_converter = get_flac_converter()
File "/usr/local/lib/python3.7/dist-packages/speech_recognition/__init__.py", line 1196, in get_flac_converter
raise OSError("FLAC conversion utility not available - consider installing the FLAC command line application by running `apt-get install flac` or your operating system's equivalent")
OSError: FLAC conversion utility not available - consider installing the FLAC command line application by running `apt-get install flac` or your operating system's equivalent
kensuke commented 3 years ago
  1. Tracing experiment Simple Typo

comment out

#except KeyboardInterrupt:
#    lcd_screen.clear()
#    lcd_screen.turn_off()
#    GPIO.cleanup()

buzzer_pin replaced to ir_pin

ir_pin = 19
GPIO.setmode(GPIO.BCM)
#GPIO.setup(buzzer_pin, GPIO.IN)
GPIO.setup(ir_pin, GPIO.IN)

Fullwidth Quotation to Halfwidth 

#lcd_screen.write_lcd(“Detected:\nblack”)
lcd_screen.write_lcd("Detected:\nblack")

#lcd_screen.write_lcd(“Detected:\nno black”)
lcd_screen.write_lcd("Detected:\nno black")
kensuke commented 3 years ago
  1. Hazardous gas alarm system

add definition

LED_BRIGHTNESS = 10

change parameter

#strip.setPixelColor(val,0,0)
strip.setPixelColor(i, Color(val, 0, 0))
kensuke commented 3 years ago
  1. Color recognizer Install library 
    $ sudo pip3 install adafruit-tcs34725

typo adta to data

#    r = abnormal_adta_processing(r)
#    g = abnormal_adta_processing(g)
#    b = abnormal_adta_processing(b)
    r = abnormal_data_processing(r)
    g = abnormal_data_processing(g)
    b = abnormal_data_processing(b)

Fullwidth Quotation to Halfwidth, fix format

#    print(‘Color: red={0} green={1} blue={2}’,format(r,g,b))
    print("Color: red={0} green={1} blue={2}".format(r,g,b))
kensuke commented 3 years ago
  1. Personal heart rate doctor pulsesensor.py

fix indent

#def getBPMLoop(self):
    def getBPMLoop(self):
kensuke commented 3 years ago

I didn't found correct solution for No.1 This is Googling result memo but too long.

Problem Stereo vs Mono?

(or my misunderstanding. I don't know Linux hardware recognition, sound device, ALSA etcetc..)

$ arecord --device=hw:1,0 --format S16_LE -c 2 -r 48000 -d 10 /home/pi/Videos/test.wav
Recording WAVE '/home/pi/Videos/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
arecord: set_params:1345: Channels count non available

$ arecord --device=hw:1,0 --format S16_LE -c 1 -r 48000 -d 10 /home/pi/Videos/test.wav
Recording WAVE '/home/pi/Videos/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

$ file Videos/test.wav 
Videos/test.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 48000 Hz

$ aplay Videos/test.wav 
Playing WAVE 'Videos/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

sox command

$ sox -d -b 16 -e signed-integer -c 2 -r 48000 /home/pi/Videos/soxtest.wav trim 0 10
sox WARN alsa: can't encode 0-bit Unknown or not applicable

Input File     : 'default' (alsa)
Channels       : 2
Sample Rate    : 48000
Precision      : 16-bit
Sample Encoding: 16-bit Signed Integer PCM

In:0.00% 00:00:10.07 [00:00:00.00] Out:480k  [      |      ]        Clip:0    
Done.

$ file Videos/soxtest.wav 
Videos/soxtest.wav: RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 48000 Hz

$ aplay Videos/soxtest.wav 
Playing WAVE 'Videos/soxtest.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo

https://superuser.com/questions/889912/how-to-record-10-seconds-of-audio-with-sox

$ ls -al Videos/*.wav
-rw-r--r-- 1 pi pi 1920044 Jan 29 16:03 Videos/soxtest.wav
-rw-r--r-- 1 pi pi  960044 Jan 29 16:03 Videos/test.wav

lsusb

...
Bus 001 Device 007: ID 058f:3841 Alcor Micro Corp. 
...

https://linux-hardware.org/index.php?id=usb:058f-3841

dmseg

...
[  172.783139] usb 1-1.3: new high-speed USB device number 7 using xhci_hcd
[  172.940459] usb 1-1.3: New USB device found, idVendor=058f, idProduct=3841, bcdDevice= 0.01
[  172.940473] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  172.940483] usb 1-1.3: Product: USB 2.0 PC Camera
[  172.940493] usb 1-1.3: Manufacturer: Alcor Micro, Corp.
[  172.944187] uvcvideo: Found UVC 1.00 device USB 2.0 PC Camera (058f:3841)
[  172.960330] uvcvideo 1-1.3:1.0: Entity type for entity Processing 2 was not initialized!
[  172.960345] uvcvideo 1-1.3:1.0: Entity type for entity Extension 6 was not initialized!
[  172.960356] uvcvideo 1-1.3:1.0: Entity type for entity Camera 1 was not initialized!
[  172.960635] input: USB 2.0 PC Camera: PC Camera as /devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input7
...

arecord -l

**** List of CAPTURE Hardware Devices ****
card 1: Camera [USB 2.0 PC Camera], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

arecord -L

TOO LOOONG results

arecord --device=hw:1,0 --dump-hw-params --format S16_LE -c 2 -r 48000 -d 10 /home/pi/Videos/test.wav

Recording WAVE '/home/pi/Videos/test.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Stereo
HW Params of device "hw:1,0":
--------------------
ACCESS:  MMAP_INTERLEAVED RW_INTERLEAVED
FORMAT:  S16_LE
SUBFORMAT:  STD
SAMPLE_BITS: 16
FRAME_BITS: 16
CHANNELS: 1
RATE: [8000 48000]
PERIOD_TIME: [1000 32768000]
PERIOD_SIZE: [32 262144]
PERIOD_BYTES: [64 524288]
PERIODS: [2 1024]
BUFFER_TIME: (1333 65536000]
BUFFER_SIZE: [64 524288]
BUFFER_BYTES: [128 1048576]
TICK_TIME: ALL
--------------------
arecord: set_params:1345: Channels count non available

cat ~/.asoundrc

pcm.!default {
    type asym
    playback.pcm {
        type plug
        slave.pcm "output"
    }
    capture.pcm {
        type plug
        slave.pcm "input"
    }
}

pcm.output {
    type hw
    card 0
}

pcm.input {
    type hw
    card 1
}

ctl.!default {
    type hw
    card 0
}

https://stackoverflow.com/questions/39552522/raspberry-pi-aplay-default-sound-card https://developers.google.com/assistant/sdk/guides/service/python/embed/audio

ALSA(Advanced Linux Sound Architecture) source code

https://github.com/alsa-project/alsa-utils/blob/master/aplay/aplay.c#L1372 https://github.com/alsa-project/alsa-lib/blob/master/src/pcm/pcm.c#L4525