diff --git a/main.go b/main.go
index 760be2e..0768f0a 100644
--- a/main.go
+++ b/main.go
@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"log"
+	"math"
 	"net/http"
 	"os"
 	"path"
@@ -247,18 +248,21 @@ func main() {
 	// concatenate VOD segments into full VOD
 	fullVodExists := func () bool {
 		// check if full VOD already exists with expected duration
-		if fullVodProbe, err := scanner.ProbeSegment(video.Filename); err != nil {
-			var totalLength float64 = 0
-			for _, filename := range vodFiles {
-				probe, err := scanner.ProbeSegment(filename)
-				if err != nil { continue }
-				totalLength += probe.Format.Duration
-			}
-			return fullVodProbe.Format.Duration == totalLength
+		fullVodProbe, err := scanner.ProbeSegment(video.Filename)
+		if err != nil { return false }
+		video.SizeBytes = fullVodProbe.Format.Size
+		var totalLength float64 = 0
+
+		for _, filename := range vodFiles {
+			probe, err := scanner.ProbeSegment(path.Join(metadata.FootageDir, filename))
+			if err != nil { continue }
+			totalLength += probe.Format.Duration
 		}
-		return false
+		return math.Abs(fullVodProbe.Format.Duration - totalLength) < float64(0.1)
 	}()
-	if !fullVodExists {
+	if fullVodExists {
+		log.Print("Full VOD appears to already exist- uploading this file...")
+	} else {
 		video.SizeBytes, err = vid.ConcatVideo(video, vodFiles, verbose)
 		if err != nil {
 			log.Fatalf("Failed to concatenate VOD segments: %v", err)
diff --git a/scanner/scanner.go b/scanner/scanner.go
index 6f973fe..394c4f1 100644
--- a/scanner/scanner.go
+++ b/scanner/scanner.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"os"
 	"path"
+	"strconv"
 	"strings"
 	"time"
 
@@ -28,13 +29,13 @@ type (
 		Category *Category	`toml:"category" comment:"(Optional) Category details, for additional credits."`
 	}
 
-	ffprobeFormat struct {
+	FFprobeFormat struct {
 		Duration float64 `json:"duration"`
 		Size int64 `json:"size"`
 	}
 
-	ffprobeOutput struct {
-		Format ffprobeFormat `json:"format"`
+	FFprobeOutput struct {
+		Format FFprobeFormat `json:"format"`
 	}
 )
 
@@ -58,15 +59,36 @@ func ScanSegments(directory string, extension string) ([]string, error) {
 	return files, nil
 }
 
-func ProbeSegment(filename string) (*ffprobeOutput, error) {
+func ProbeSegment(filename string) (*FFprobeOutput, error) {
 	out, err := ffmpeg_go.Probe(filename)
 	if err != nil { return nil, err }
 
-	probe := ffprobeOutput{}
+	type (
+		RawFFprobeFormat struct {
+			// these being strings upsets me immensely
+			Duration string `json:"duration"`
+			Size string `json:"size"`
+		}
+		RawFFprobeOutput struct {
+			Format RawFFprobeFormat `json:"format"`
+		}
+	)
+
+	probe := RawFFprobeOutput{}
 	err = json.Unmarshal([]byte(out), &probe)
 	if err != nil { return nil, err }
 
-	return &probe, nil
+	duration, err := strconv.ParseFloat(probe.Format.Duration, 64)
+	if err != nil { return nil, err }
+	size, err := strconv.ParseInt(probe.Format.Size, 10, 0)
+	if err != nil { return nil, err }
+
+	return &FFprobeOutput{
+		Format: FFprobeFormat{
+			Duration: duration,
+			Size: size,
+		},
+	}, nil
 }
 
 func ReadMetadata(directory string) (*Metadata, error) {