Fix short segment thumbnails. Move to JPG thumbs. Fix default thumb copy.

.gitignore

@@ -18,7 +18,7 @@ vendor/
 config/config.yaml
 config/stats.json
 owncast
-webroot/thumbnail.png
+webroot/thumbnail.jpg
 webroot/hls
 webroot/static/content.md
 hls/

ffmpeg.go

@@ -51,7 +51,7 @@ func showStreamOfflineState(configuration Config) {
 		// "-stream_loop 100",
 		// "-fflags", "+genpts",
 		"-i", configuration.VideoSettings.OfflineImage,
-		"-i", "webroot/thumbnail.png",
+		"-i", "webroot/thumbnail.jpg",
 		"-filter_complex", "\"[0:v]scale=2640:2360[bg];[bg][1:v]overlay=200:250:enable='between(t,0,3)'\"",
 		videoMapsString, // All the different video variants
 		"-f hls",

scripts/build.sh

@@ -21,7 +21,7 @@ GIT_COMMIT=$(git rev-list -1 HEAD)
 cd $(git rev-parse --show-toplevel)
 
 echo "Cleaning working directories..."
-rm -rf ./webroot/hls/* ./hls/* ./webroot/thumbnail.png
+rm -rf ./webroot/hls/* ./hls/* ./webroot/thumbnail.jpg
 
 echo "Creating version ${VERSION} from commit ${GIT_COMMIT}"
 

thumbnailGenerator.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"os/exec"
 	"path"
+	"strings"
 	"time"
 )
 
@@ -30,7 +31,9 @@ func startThumbnailGenerator(chunkPath string) {
 func fireThumbnailGenerator(chunkPath string) {
 	framePath := path.Join(chunkPath, "0")
 	files, err := ioutil.ReadDir(framePath)
-	outputFile := path.Join("webroot", "thumbnail.png")
+
+	// JPG takes less time to encode than PNG
+	outputFile := path.Join("webroot", "thumbnail.jpg")
 
 	// fmt.Println("Generating thumbnail from", framePath, "to", outputFile)
 
@@ -63,7 +66,18 @@ func fireThumbnailGenerator(chunkPath string) {
 
 	mostRecentFile := path.Join(framePath, names[0])
 
-	ffmpegCmd := "ffmpeg -y -i " + mostRecentFile + " -ss 00:00:01.000 -vframes 1 " + outputFile
+	thumbnailCmdFlags := []string{
+		configuration.FFMpegPath,
+		"-y",                 // Overwrite file
+		"-threads 1",         // Low priority processing
+		"-t 1",               // Pull from frame 1
+		"-i", mostRecentFile, // Input
+		"-f image2",  // format
+		"-vframes 1", // Single frame
+		outputFile,
+	}
+
+	ffmpegCmd := strings.Join(thumbnailCmdFlags, " ")
 
 	// fmt.Println(ffmpegCmd)
 

utils.go

@@ -78,10 +78,10 @@ func resetDirectories(configuration Config) {
 
 func createInitialOfflineState() {
 	// Provide default files
-	showStreamOfflineState(configuration)
-	if !fileExists("webroot/thumbnail.png") {
-		copy("static/logo.png", "webroot/thumbnail.png")
+	if !fileExists("webroot/thumbnail.jpg") {
+		copy("static/logo.png", "webroot/thumbnail.jpg")
 	}
+	showStreamOfflineState(configuration)
 }
 
 func getClientIDFromRequest(req *http.Request) string {

webroot/index.html

@@ -74,7 +74,7 @@ GW TODO:
             autoplay
             playsinline
             muted
-            poster="/thumbnail.png"
+            poster="/thumbnail.jpg"
           >
           </video>
         </div>