thumbnails: png output

thumbnails/thumbnails.go

@@ -219,8 +219,6 @@ func processSegment(input string, thumbOut string) error {
 					"vframes": "1",
 					// video filter to resize
 					"vf": fmt.Sprintf("scale=%s:force_original_aspect_ratio=decrease", resolution),
-					// set quality
-					"q:v": "2",
 				},
 			).OverWriteOutput().WithErrorOutput(&ffmpegErr).Run()
 	}, clients.DownloadRetryBackoff())
@@ -254,5 +252,5 @@ func thumbFilename(segmentURI string, segmentOffset int64) (string, error) {
 	if err != nil {
 		return "", err
 	}
-	return fmt.Sprintf("keyframes_%d.jpg", i-segmentOffset), nil
+	return fmt.Sprintf("keyframes_%d.png", i-segmentOffset), nil
 }

thumbnails/thumbnails_test.go

@@ -104,21 +104,21 @@ func testGenerateThumbsRun(t *testing.T, outDir, input string) {
 
 	expectedVtt := `WEBVTT
 00:00:00.000 --> 00:00:10.000
-keyframes_0.jpg
+keyframes_0.png
 
 00:00:10.000 --> 00:00:20.000
-keyframes_1.jpg
+keyframes_1.png
 
 00:00:20.000 --> 00:00:30.000
-keyframes_2.jpg
+keyframes_2.png
 
 `
 
 	vtt, err := os.ReadFile(filepath.Join(outDir, "thumbnails/thumbnails.vtt"))
 	require.NoError(t, err)
 	require.Equal(t, expectedVtt, string(vtt))
 
-	files, err := filepath.Glob(filepath.Join(outDir, "thumbnails", "*.jpg"))
+	files, err := filepath.Glob(filepath.Join(outDir, "thumbnails", "*.png"))
 	require.NoError(t, err)
 	require.Len(t, files, 3)
 
@@ -143,19 +143,19 @@ func Test_thumbFilename(t *testing.T) {
 			name:          "index",
 			segmentURI:    "index0.ts",
 			segmentOffset: 0,
-			want:          "keyframes_0.jpg",
+			want:          "keyframes_0.png",
 		},
 		{
 			name:          "clip",
 			segmentURI:    "clip_1.ts",
 			segmentOffset: 0,
-			want:          "keyframes_1.jpg",
+			want:          "keyframes_1.png",
 		},
 		{
 			name:          "clip",
 			segmentURI:    "clip_101.ts",
 			segmentOffset: 100,
-			want:          "keyframes_1.jpg",
+			want:          "keyframes_1.png",
 		},
 	}
 	for _, tt := range tests {