dropped-frame tracke

internal/playback/video_bridge.go

@@ -6,7 +6,9 @@ import (
 )
 
 type PendingVideoFrame struct {
-	Frame VideoFrame
+	Frame      VideoFrame
+	Generation uint64
+	Source     FeedConfig
 
 	completeOnce sync.Once
 	result       chan error
@@ -27,8 +29,10 @@ func (b *VideoBridge) ConsumeVideo(
 	frame VideoFrame,
 ) error {
 	pending := &PendingVideoFrame{
-		Frame:  frame,
-		result: make(chan error, 1),
+		Frame:      frame,
+		Generation: generationFromContext(ctx),
+		Source:     videoSourceFromContext(ctx),
+		result:     make(chan error, 1),
 	}
 
 	select {