Question

我正在研发一款基于Raspberry Pi的头戴式移动相机。它始终是录音。在按钮上按前两分钟，将保存以下一分钟，将删除缓冲区中剩余的录制文件。

我现在想要通过usb声卡同时录制视频和音频。为此，我相信我需要Python线程。

可悲的是，以下代码没有做任何事情。两个 while循环都按预期工作。但是在这个脚本中加入线程它们不会。终端只承认“sudo python x.py”并且没有回应。

感谢您的每一条评论！

#!/usr/bin/envpython

import subprocess
import datetime

import RPi.GPIO as GPIO
import time

from subprocess import call
from datetime import datetime

import os
import sys
import time
import thread

def blink(pin): 
    GPIO.output(pin,GPIO.HIGH)
    time.sleep(0.5)
    GPIO.output(pin,GPIO.LOW)
    return

loop=True

def my_callback(channel): #linking the blink to the button press on pin8
        blink(12)
        return

GPIO.setmode(GPIO.BOARD)
GPIO.setup(8, GPIO.IN) #set pin8 as receivable to button input
GPIO.add_event_detect(8, GPIO.FALLING, callback=my_callback) #button and LED are ready

def ongoingvideo():
    while True:
        GPIO.setup(12, GPIO.OUT) #pin12 powers LED
        GPIO.output(12, False) #turn on LED
            ts=datetime.now()
            a= ts.strftime("%H%M%S") #a is time variable
            filename = a #video is called after timestamp
            print "Start recording of a: " + a + (threadname1)
            call (["raspivid -t 60000 -b 15000000 -hf -vf -n -o /home/pi/recordings/vid/buffer/" + filename + ".h264"], shell=True)
            if GPIO.event_detected(8):  
                ts=datetime.now()
                b= ts.strftime("%H%M%S") #b is time variable
                lastfilename = b #video is called after timestamp
                print "Start recording of b: " + b
                call (["raspivid -t 60000 -b 15000000 -hf -vf -n -o /home/pi/recordings/vid/buffer/" + lastfilename + ".h264"], shell=True)
                files = os.listdir("/home/pi/recordings/vid/buffer/")
            files.sort()
            for x in files[-3:]: #"saving" the last 3 files of the endless buffer
                call (["mv /home/pi/recordings/vid/buffer/" + x + " /home/pi/recordings/vid/fullhd30fps"], shell=True)
            call (["rm /home/pi/recordings/vid/buffer/*"], shell=True) #deleting remaining buffer files to free disk space
            call (["sudo fake-hwclock save"], shell=True)

def ongoingaudio():
    while True:
        ts=datetime.now()
            d= ts.strftime("%H%M%S") #d is time variable
            audioname = d #video is called after timestamp
            print "Start recording of d: " + d + (threadname2)
            call (["sudo arecord -D plughw:1,0 -f cd -d 60 /home/pi/recordings/audio/buffer/" + audioname + ".wav"], shell=True)
            if GPIO.event_detected(8):  
                ts=datetime.now()
                e= ts.strftime("%H%M%S") #e is time variable
                lastaudioname = e #video is called after timestamp
                print "Start recording of e: " + e
                call (["sudo arecord -D plughw:1,0 -f cd -d 60 /home/pi/recordings/audio/buffer/" + lastaudioname + ".wav"], shell=True)
                files = os.listdir("/home/pi/recordings/audio/buffer/")
            files.sort()
            for x in files[-3:]: #"saving" the last 3 files of the endless buffer
                call (["mv /home/pi/recordings/audio/buffer/" + x + " /home/pi/recordings/audio/wav"], shell=True)
            call (["rm /home/pi/recordings/audio/buffer/*"], shell=True) #deleting remaining buffer files to free disk space






thread.start_new_thread(ongoingvideo, ())
thread.start_new_thread(ongoingaudio, ())

Python线程音频+视频

0 个答案: