From 27d769cd073ab4a77d7ba1cd6c76d52cd51d790f Mon Sep 17 00:00:00 2001
From: Zoe Roux <zoe.roux@zoriya.dev>
Date: Sun, 11 Aug 2024 15:49:35 +0200
Subject: [PATCH] Do not copy on keyframes.Slice if not needed

---
 transcoder/src/keyframes.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/transcoder/src/keyframes.go b/transcoder/src/keyframes.go
index f8d74378..2b3ade5a 100644
--- a/transcoder/src/keyframes.go
+++ b/transcoder/src/keyframes.go
@@ -37,7 +37,12 @@ func (kf *Keyframe) Slice(start int32, end int32) []float64 {
 	}
 	kf.info.mutex.RLock()
 	defer kf.info.mutex.RUnlock()
+
 	ref := kf.Keyframes[start:end]
+	if kf.IsDone {
+		return ref
+	}
+	// make a copy since we will continue to mutate the array.
 	ret := make([]float64, end-start)
 	copy(ret, ref)
 	return ret