configurable minimum number of sprites

graphql/schema/types/config.graphql

@@ -187,6 +187,8 @@ input ConfigGeneralInput {
 
   "Time between two different scrubber sprites"
   spriteInterval: Int
+  "Minimum number of sprites to be generated"
+  minimumSprites: Int
 }
 
 type ConfigGeneralResult {
@@ -292,6 +294,8 @@ type ConfigGeneralResult {
   logFileMaxSize: Int!
   "Time between two different scrubber sprites"
   spriteInterval: Int!
+  "Minimum number of sprites to be generated"
+  minimumSprites: Int!
   "Array of video file extensions"
   videoExtensions: [String!]!
   "Array of image file extensions"

internal/api/resolver_mutation_configure.go

@@ -288,6 +288,7 @@ func (r *mutationResolver) ConfigureGeneral(ctx context.Context, input ConfigGen
 		c.SetString(config.PreviewPreset, input.PreviewPreset.String())
 	}
 	r.setConfigInt(config.SpriteInterval, input.SpriteInterval)
+	r.setConfigInt(config.MinimumSprites, input.MinimumSprites)
 
 	r.setConfigBool(config.TranscodeHardwareAcceleration, input.TranscodeHardwareAcceleration)
 	if input.MaxTranscodeSize != nil {

internal/api/resolver_query_configuration.go

@@ -97,6 +97,7 @@ func makeConfigGeneralResult() *ConfigGeneralResult {
 		VideoFileNamingAlgorithm:      config.GetVideoFileNamingAlgorithm(),
 		ParallelTasks:                 config.GetParallelTasks(),
 		SpriteInterval:                config.GetSpriteInterval(),
+		MinimumSprites:                config.GetMinimumSprites(),
 		PreviewAudio:                  config.GetPreviewAudio(),
 		PreviewSegments:               config.GetPreviewSegments(),
 		PreviewSegmentDuration:        config.GetPreviewSegmentDuration(),

internal/manager/config/config.go

@@ -86,6 +86,9 @@ const (
 	SpriteInterval        = "sprite_interval"
 	SpriteIntervalDefault = 0
 
+	MinimumSprites        = "minimum_sprites"
+	MinimumSpritesDefault = 10
+
 	PreviewPreset                 = "preview_preset"
 	TranscodeHardwareAcceleration = "ffmpeg.hardware_acceleration"
 
@@ -982,6 +985,11 @@ func (i *Config) GetSpriteInterval() int {
 	return i.getInt(SpriteInterval)
 }
 
+// GetMinimumSprites return the minimum number of sprites that have to be generated
+func (i *Config) GetMinimumSprites() int {
+	return i.getInt(MinimumSprites)
+}
+
 func (i *Config) GetPreviewAudio() bool {
 	return i.getBool(PreviewAudio)
 }
@@ -1862,6 +1870,7 @@ func (i *Config) setDefaultValues() {
 	i.setDefault(SoundOnPreview, false)
 
 	i.setDefault(SpriteInterval, SpriteIntervalDefault)
+	i.setDefault(MinimumSprites, MinimumSpritesDefault)
 
 	i.setDefault(ThemeColor, DefaultThemeColor)
 

internal/manager/generator_sprite.go

@@ -18,7 +18,6 @@ import (
 
 const (
 	DefaultSpriteInterval = 30
-	MinimalSpriteCount    = 10
 )
 
 type SpriteGenerator struct {
@@ -47,9 +46,12 @@ func NewSpriteGenerator(videoFile ffmpeg.VideoFile, videoChecksum string, imageO
 	if config.GetSpriteInterval() != 0 {
 		spriteInterval = config.GetSpriteInterval()
 	}
+
+	minimumSpriteCount := config.GetMinimumSprites()
 	spriteCount := int64(math.Ceil(videoFile.VideoStreamDuration / float64(spriteInterval)))
+
 	// For files with small duration / low frame count  try to seek using frame number intead of seconds
-	if (spriteCount == 0) || (videoFile.VideoStreamDuration < float64(spriteInterval*MinimalSpriteCount)) || (0 < videoFile.FrameCount && videoFile.FrameCount <= spriteCount) { // some files can have FrameCount == 0
+	if (spriteCount == 0) || (videoFile.VideoStreamDuration < float64(spriteInterval*minimumSpriteCount)) || (0 < videoFile.FrameCount && videoFile.FrameCount <= spriteCount) { // some files can have FrameCount == 0
 		if videoFile.VideoStreamDuration <= 0 {
 			s := fmt.Sprintf("video %s: duration(%.3f)/frame count(%d) invalid, skipping sprite creation", videoFile.Path, videoFile.VideoStreamDuration, videoFile.FrameCount)
 			return nil, errors.New(s)
@@ -71,10 +73,10 @@ func NewSpriteGenerator(videoFile ffmpeg.VideoFile, videoChecksum string, imageO
 	if err != nil {
 		return nil, err
 	}
-	if spriteCount > int64(MinimalSpriteCount) {
+	if spriteCount > int64(minimumSpriteCount) {
 		generator.ChunkCount = int(spriteCount)
 	} else {
-		generator.ChunkCount = MinimalSpriteCount
+		generator.ChunkCount = minimumSpriteCount
 	}
 	if err := generator.configure(); err != nil {
 		return nil, err

ui/v2.5/graphql/data/config.graphql

@@ -40,6 +40,7 @@ fragment ConfigGeneralData on ConfigGeneralResult {
   logAccess
   logFileMaxSize
   spriteInterval
+  minimumSprites
   createGalleriesFromFolders
   galleryCoverRegex
   videoExtensions

ui/v2.5/src/components/Settings/SettingsSystemPanel.tsx

@@ -435,6 +435,13 @@ export const SettingsConfigurationPanel: React.FC = () => {
           value={general.spriteInterval ?? 0}
           onChange={(v) => saveGeneral({ spriteInterval: v })}
         />
+        <NumberSetting
+          id="scrubber-sprites-minimum"
+          headingID=/*"config.general.include_audio_head"todo*/"Minimum sprites"
+          subHeadingID=/*"config.general.include_audio_desc"*/"todo: Minimum number of sprites to be generated"
+          value={general.minimumSprites ?? 10}
+          onChange={(v) => saveGeneral({ minimumSprites: v })}
+        />
       </SettingSection>
 
       <SettingSection headingID="config.general.heatmap_generation">