Restructure ffmpeg (#2392)

* Refactor transcode generation
* Move phash generation into separate package
* Refactor image thumbnail generation
* Move JSONTime to separate package
* Ffmpeg refactoring
* Refactor live transcoding
* Refactor scene marker preview generation
* Refactor preview generation
* Refactor screenshot generation
* Refactor sprite generation
* Change ffmpeg.IsStreamable to return error
* Move frame rate calculation into ffmpeg
* Refactor file locking
* Refactor title set during scan
* Add missing lockmanager instance
* Return error instead of logging in MatchContainer

pkg/models/json/json_time.go

@@ -0,0 +1,50 @@
+package json
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/stashapp/stash/pkg/utils"
+)
+
+var currentLocation = time.Now().Location()
+
+type JSONTime struct {
+	time.Time
+}
+
+func (jt *JSONTime) UnmarshalJSON(b []byte) error {
+	s := strings.Trim(string(b), "\"")
+	if s == "null" {
+		jt.Time = time.Time{}
+		return nil
+	}
+
+	// #731 - returning an error here causes the entire JSON parse to fail for ffprobe.
+	jt.Time, _ = utils.ParseDateStringAsTime(s)
+	return nil
+}
+
+func (jt *JSONTime) MarshalJSON() ([]byte, error) {
+	if jt.Time.IsZero() {
+		return []byte("null"), nil
+	}
+	return []byte(fmt.Sprintf("\"%s\"", jt.Time.Format(time.RFC3339))), nil
+}
+
+func (jt JSONTime) GetTime() time.Time {
+	if currentLocation != nil {
+		if jt.IsZero() {
+			return time.Now().In(currentLocation)
+		} else {
+			return jt.Time.In(currentLocation)
+		}
+	} else {
+		if jt.IsZero() {
+			return time.Now()
+		} else {
+			return jt.Time
+		}
+	}
+}