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implement frameskip for motion detection

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reduce power consumption
This commit is contained in:
Steven Polley 2020-10-29 04:32:45 +00:00
parent 300367c00b
commit d22a376146
1 changed files with 17 additions and 12 deletions
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7
main.go
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@ -14,7 +14,7 @@ import (
const ( const (
minimumMotionArea = 3000 // Motion detection minimum area needed to move minimumMotionArea = 3000 // Motion detection minimum area needed to move
recordLengthAfterMotion = 30 // Number of seconds to keep recording going after motion was last detected recordLengthAfterMotion = 30 // Number of seconds to keep recording going after motion was last detected
motionDetectInterval = 1 //number of seconds between motion detection attempts // TBD: Implement this, currently does nothing motionDetectInterval = 30 //number of frames between motion detection attempts // TBD: Implement this, currently does nothing
) )
var ( var (
@ -65,6 +65,8 @@ func main() {
detectMotion(img) detectMotion(img)
} }
frameCount := 0
// main loop // main loop
for { for {
if ok := webcam.Read(&img); !ok { if ok := webcam.Read(&img); !ok {
@ -75,6 +77,7 @@ func main() {
continue continue
} }
if frameCount >= motionDetectInterval {
if detectMotion(img) { if detectMotion(img) {
// Determine if a new recording needs to start // Determine if a new recording needs to start
if time.Now().After(lastMotionDetectedTime.Add(time.Second * recordLengthAfterMotion)) { if time.Now().After(lastMotionDetectedTime.Add(time.Second * recordLengthAfterMotion)) {
@ -89,6 +92,8 @@ func main() {
// And always update the timestamp // And always update the timestamp
lastMotionDetectedTime = time.Now() lastMotionDetectedTime = time.Now()
} }
frameCount = 0
}
// Determine if we are currently recording and if so, then save the frame to the video // Determine if we are currently recording and if so, then save the frame to the video
if currentRecording != nil { if currentRecording != nil {