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Add 3 different options: no motion, edge detect, motion detect

This commit is contained in:
richardsonjack 2017-12-07 11:54:15 +10:30
parent bb2a593dc1
commit e9fb26d624
1 changed files with 175 additions and 53 deletions
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228
revid/revid.go
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@ -36,9 +36,11 @@ import (
"encoding/hex"
"flag"
"fmt"
"image"
"io"
"io/ioutil"
"log"
"math"
"math/rand"
"net"
"net/http"
@ -58,21 +60,22 @@ import (
// defaults and networking consts
const (
clipDuration = 1 // s
defaultPID = 256
defaultFrameRate = 25
defaultHTTPOutput = "http://localhost:8080?"
defaultUDPOutput = "udp://0.0.0.0:16384"
defaultRTPOutput = "rtp://0.0.0.0:16384"
mp2tPacketSize = 188 // MPEG-TS packet size
mp2tMaxPackets = 2016 // # first multiple of 7 and 8 greater than 2000
mp2tMaxPackets = 2016*clipDuration // # first multiple of 7 and 8 greater than 2000
udpPackets = 7 // # of UDP packets per ethernet frame (8 is the max)
rtpPackets = 7 // # of RTP packets per ethernet frame (7 is the max)
rtpHeaderSize = 12
rtpSSRC = 1 // any value will do
bufferSize = 1000
bufferSize = 1000/clipDuration
bitrateOutputDelay = 60 // s
httpTimeOut = 5 // s
clipDuration = 1 // s
motionThreshold = 0
)
// flag values
@ -82,6 +85,8 @@ const (
filterScale640 = 0x0004
filterScale320 = 0x0008
filterFixContinuity = 0x0010
filterEdgeDetection = 0x0020
filterMotionDetect = 0x0040
dumpProgramInfo = 0x0100 // 256
dumpPacketStats = 0x0200 // 512
dumpPacketHeader = 0x0400 // 1024
@ -168,7 +173,7 @@ func main() {
case err := <-inputErrChan:
fmt.Fprintln(os.Stderr, err)
fmt.Fprintln(os.Stderr, "Trying again in 10s")
time.Sleep(10 * time.Second)
//time.Sleep(10 * time.Second)
go input(*inputURL, *outputURL)
case err := <-outputErrChan:
fmt.Fprintln(os.Stderr, err)
@ -195,49 +200,7 @@ func setUpDirs() {
// input handles the reading from the specified input
func input(input string, output string) {
fmt.Printf("Reading video from %s\n", input)
args := []string{
"-r", strconv.Itoa(*frameRate),
"-i", input,
}
if *flags&(filterFixPTS|filterScale640|filterScale320) == 0 {
args = append(args, "-vcodec", "copy")
} else {
vfArg := []string{}
if *flags&filterFixPTS != 0 {
vfArg = append(vfArg, "setpts='PTS-STARTPTS'") // start counting PTS from zero
}
if *flags&filterScale640 != 0 {
vfArg = append(vfArg, "scale=640:352")
} else if *flags&filterScale320 != 0 {
vfArg = append(vfArg, "scale=320:176")
}
args = append(args, "-vf", strings.Join(vfArg, ","))
}
if *flags&filterDropAudio == 0 {
args = append(args, "-acodec", "copy")
} else {
args = append(args, "-an")
}
args = append(args, "-f", "mpegts", "-")
fmt.Printf("Executing: %s %s\n", ffmpegPath, strings.Join(args, " "))
cmd := exec.Command(ffmpegPath, args...)
stdout, err := cmd.StdoutPipe()
if err != nil {
inputErrChan <- err
return
}
err = cmd.Start()
if err != nil {
inputErrChan <- err
return
}
// (re)initialize globals
clipCount = 0
expectCC = -1
@ -245,6 +208,8 @@ func input(input string, output string) {
dumpPCRBase = 0
rtpSequenceNum = uint16(rand.Intn(1 << 15))
var err error
// for UDP and RTP only dial once
if strings.HasPrefix(output, "udp://") || strings.HasPrefix(output, "rtp://") {
conn, err = net.Dial("udp", output[6:])
@ -254,12 +219,115 @@ func input(input string, output string) {
}
}
br := bufio.NewReader(stdout)
var br *bufio.Reader
if *flags&filterEdgeDetection != 0{
args := []string{
"-r", "25",
"-i", input,
"-pix_fmt", "gray",
"-vf", "edgedetect",
"-f", "mpegts", "-",
}
fmt.Printf("Executing: %s %s\n", ffmpegPath, strings.Join(args, " "))
cmd := exec.Command(ffmpegPath, args...)
stdout, _ := cmd.StdoutPipe()
err := cmd.Start()
if err != nil {
inputErrChan <- err
return
}
br = bufio.NewReader(stdout)
}else{
if *flags&filterMotionDetect != 0{
args := []string{
"-i", input,
"-vf", "\"select=gt(scene,0.0001),setpts=N/(25*TB),fps=fps=25\"",
"-f", "mpegts", "-",
}
fmt.Printf("Executing: %s %s\n", ffmpegPath, strings.Join(args, " "))
cmd := exec.Command(ffmpegPath, args...)
stdout, _ := cmd.StdoutPipe()
err := cmd.Start()
if err != nil {
inputErrChan <- err
return
}
br = bufio.NewReader(stdout)
}else{
args := []string{
"-r", strconv.Itoa(*frameRate),
"-i", input,
}
if *flags&(filterFixPTS|filterScale640|filterScale320) == 0 {
args = append(args, "-vcodec", "copy")
} else {
vfArg := []string{}
if *flags&filterFixPTS != 0 {
vfArg = append(vfArg, "setpts='PTS-STARTPTS'") // start counting PTS from zero
}
if *flags&filterScale640 != 0 {
vfArg = append(vfArg, "scale=640:352")
} else if *flags&filterScale320 != 0 {
vfArg = append(vfArg, "scale=320:176")
}
args = append(args, "-vf", strings.Join(vfArg, ","))
}
if *flags&filterDropAudio == 0 {
args = append(args, "-acodec", "copy")
} else {
args = append(args, "-an")
}
args = append(args, "-f", "mpegts", "-")
fmt.Printf("Executing: %s %s\n", ffmpegPath, strings.Join(args, " "))
cmd := exec.Command(ffmpegPath, args...)
stdout, err := cmd.StdoutPipe()
if err != nil {
inputErrChan <- err
return
}
err = cmd.Start()
if err != nil {
inputErrChan <- err
return
}
br = bufio.NewReader(stdout)
}
}
clipStore(br,input)
}
func clipStore(br *bufio.Reader, input string){
clipSize := 0
packetCount := 0
now := time.Now()
prevTime := now
fmt.Printf("Looping\n")
for {
if clip, err := ringBuffer.Get(); err != nil {
inputErrChan <- err
@ -268,15 +336,18 @@ func input(input string, output string) {
for {
upperBound := clipSize + mp2tPacketSize
_, err := io.ReadFull(br, clip[clipSize:upperBound])
if err != nil {
inputErrChan <- err
return
}
if *flags&filterFixContinuity != 0 && mp2tFixContinuity(clip[clipSize:upperBound], packetCount, uint16(*selectedPID)) {
if *flags&filterFixContinuity != 0 && mp2tFixContinuity(clip[clipSize:upperBound], uint16(*selectedPID)) {
fmt.Printf("Packet #%d.%d fixed\n", clipCount, packetCount)
}
packetCount++
clipSize += mp2tPacketSize
// send if (1) our buffer is full or (2) 1 second has elapsed and we have % packetsPerFrame
now = time.Now()
if (packetCount == mp2tMaxPackets) ||
@ -296,6 +367,42 @@ func input(input string, output string) {
}
}
func printGray(img *image.Gray) {
shade := []string{" ", "█"}
for i, p := range img.Pix {
x := 0
if p > 20 {
x = 1
}
fmt.Print(shade[x])
if (i+1)%640 == 0 {
fmt.Print("\n")
}
}
}
func checkSlice(a,b *image.Gray){
for i , _ := range a.Pix{
fmt.Printf("%v - %v = %v\n", a.Pix[i], b.Pix[i], a.Pix[i]-b.Pix[i])
}
}
func FastCompare(img1, img2 *image.Gray) (float64, error) {
if img1.Bounds() != img2.Bounds() {
return 0, fmt.Errorf("image bounds not equal: %+v, %+v", img1.Bounds(), img2.Bounds())
}
accumError := float64(0)
for i := 0; i < len(img1.Pix); i+= 20 {
accumError += float64((img1.Pix[i] - img2.Pix[i]) * (img1.Pix[i] - img2.Pix[i]))
}
return math.Sqrt(accumError), nil
}
// output handles the writing to specified output
func output(output string) {
elapsedTime := time.Duration(0)
@ -304,7 +411,9 @@ func output(output string) {
for {
if clip, err := ringBuffer.Read(); err == nil {
now := time.Now()
err := sendClip(clip, output, conn)
sendClipToStdout(clip, output, conn)
for err != nil {
outputErrChan <- err
err = sendClip(clip, output, conn)
@ -440,6 +549,7 @@ func sendClipToStdout(clip []byte, _ string, _ net.Conn) error {
tcs := pkt[3] & 0xc0 >> 6
afc := pkt[3] & 0x30 >> 4
cc = int(pkt[3] & 0xf)
di := pkt[5]&0x80
if dumpCC != -1 && cc != dumpCC {
discontinuities++
@ -458,14 +568,14 @@ func sendClipToStdout(clip []byte, _ string, _ net.Conn) error {
if adaptationfield.HasPCR(pkt) {
pcrBase, pcrExt, _ := mp2tGetPCR(pkt)
if *flags&dumpPacketHeader != 0 {
fmt.Printf("\t\tAFL=%d, PCRbase=%d, PCRext=%d\n", afl, pcrBase, pcrExt)
fmt.Printf("\t\tAFL=%d, PCRbase=%d, PCRext=%d, DI=%v\n", afl, pcrBase, pcrExt, di)
}
if pcrBase < dumpPCRBase {
fmt.Printf("Warning: PCRbase went backwards!\n")
}
dumpPCRBase = pcrBase
} else if *flags&dumpPacketHeader != 0 {
fmt.Printf("\t\tAFL=%d\n", afl)
fmt.Printf("\t\tAFL=%d, DI=%v\n", afl, di)
}
}
if *flags&dumpPacketPayload != 0 {
@ -528,10 +638,11 @@ func mp2tDumpPmt(pn uint16, pmt psi.PMT) {
}
// Mp2tFixContinuity fixes discontinous MPEG-TS continuity counts (CC)
func mp2tFixContinuity(pkt []byte, packetCount int, pid uint16) bool {
func mp2tFixContinuity(pkt []byte, pid uint16) bool {
hasPayload, err := packet.ContainsPayload(pkt)
if err != nil {
fmt.Printf("Warning: Packet #%d.%d bad.\n", clipCount, packetCount)
fmt.Printf("Warning: Packet bad.\n")
return false
}
if !hasPayload {
@ -546,6 +657,7 @@ func mp2tFixContinuity(pkt []byte, packetCount int, pid uint16) bool {
if expectCC == -1 {
expectCC = cc
} else if cc != expectCC {
fmt.Println("Have to fix")
pkt[3] = pkt[3]&0xf0 | byte(expectCC&0xf)
fixed = true
}
@ -553,6 +665,16 @@ func mp2tFixContinuity(pkt []byte, packetCount int, pid uint16) bool {
return fixed
}
func resetContinuityCount(pkt []byte) (bool){
if afc := pkt[3] & 0x30 >> 4; afc == 3{
pkt[5] = pkt[5] | byte(1 << 7)
}
return true
}
// Mp2tGetPCR extracts the Program Clock Reference (PCR) from an MPEG-TS packet (if any)
func mp2tGetPCR(pkt []byte) (uint64, uint32, bool) {
if !adaptationfield.HasPCR(pkt) {