revid: fixed raspivid args and logging

revid/revid.go

@@ -36,6 +36,7 @@ import (
 	"os"
 	"os/exec"
 	"strconv"
+	"strings"
 	"time"
 
 	"bitbucket.org/ausocean/av/rtmp"
@@ -421,39 +422,32 @@ func (r *Revid) startRaspivid() error {
 	r.config.Logger.Log(smartlogger.Info, "Starting raspivid!")
 	switch r.config.InputCodec {
 	case H264:
-		// FIXME(saxon): consider using a map right from the start to store
-		// the raspivid args
-		raspiArgs := make(map[string]string)
-		raspiArgs["-cd"] = "H264"
-		raspiArgs["-o"] = "-"
-		raspiArgs["-n"] = ""
-		raspiArgs["-t"] = runContinuously
-		raspiArgs["-b"] = r.config.Bitrate
-		raspiArgs["-w"] = r.config.Width
-		raspiArgs["-h"] = r.config.Height
-		raspiArgs["-fps"] = r.config.FrameRate
-		raspiArgs["-ih"] = ""
-		raspiArgs["-g"] = r.config.IntraRefreshPeriod
+		args := []string{
+			"-cd", "H264",
+			"-o", "-",
+			"-n",
+			"-t", runContinuously,
+			"-b", r.config.Bitrate,
+			"-w", r.config.Width,
+			"-h", r.config.Height,
+			"-fps", r.config.FrameRate,
+			"-ih",
+			"-g", r.config.IntraRefreshPeriod,
+		}
 
 		if r.config.QuantizationMode == QuantizationOn {
-			raspiArgs["-qp"] = r.config.Quantization
+			args = append(args, "-qp", r.config.Quantization)
 		}
 		if r.config.HorizontalFlip == Yes {
-			raspiArgs["-hf"] = strconv.Itoa(int(r.config.HorizontalFlip))
+			args = append(args, "-hf")
 		}
 		if r.config.VerticalFlip == Yes {
-			raspiArgs["-vf"] = strconv.Itoa(int(r.config.VerticalFlip))
+			args = append(args, "-vf")
 		}
 		// Log all the args and create []string
-		args := make([]string, 0)
-		for i := range raspiArgs {
-			r.config.Logger.Log(smartlogger.Info, "Raspivid arg", i, raspiArgs[i])
-			// First append the flag
-			args = append(args, i)
-			// and now append any values for the flag
-			args = append(args, raspiArgs[i])
-		}
-		r.cmd = exec.Command("raspivid", args...)
+		argsStr := strings.Join(args, " ")
+		r.config.Logger.Log(smartlogger.Info, "Raspivid args", "raspividArgs", argsStr)
+		r.cmd = exec.Command("raspivid", argsStr)
 
 	case Mjpeg:
 		// FIXME(saxon): do above in this case too