From 097a2585ab480525372453b25b4c97bb73232a46 Mon Sep 17 00:00:00 2001
From: Zoe Roux <zoe.roux@zoriya.dev>
Date: Thu, 7 May 2026 12:09:33 +0200
Subject: [PATCH 1/2] Fix out of range end get

---
 transcoder/src/transcode_status.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/transcoder/src/transcode_status.go b/transcoder/src/transcode_status.go
index 4d3b9f60..40c38a7a 100644
--- a/transcoder/src/transcode_status.go
+++ b/transcoder/src/transcode_status.go
@@ -178,8 +178,8 @@ func listHeadRanges(file *FileStream, stream *Stream, isVideo bool, index uint32
 
 		end := stream.file.Info.Duration
 		length, _ := stream.keyframes.Length()
-		if head.end <= length {
-			end = stream.keyframes.Get(head.end)
+		if head.end-1 < length {
+			end = stream.keyframes.Get(head.end - 1)
 		}
 
 		ret = append(ret, HeadRange{
@@ -204,7 +204,7 @@ func listHeadRanges(file *FileStream, stream *Stream, isVideo bool, index uint32
 
 		ret = append(ret, HeadRange{
 			Start:     stream.keyframes.Get(start),
-			End:       stream.keyframes.Get(end),
+			End:       stream.keyframes.Get(end - 1),
 			StartHead: start,
 			EndHead:   end,
 			IsRunning: false,

From 0fd70cfcad0a018e5675f30ce45449861be76bd8 Mon Sep 17 00:00:00 2001
From: Zoe Roux <zoe.roux@zoriya.dev>
Date: Thu, 7 May 2026 13:58:31 +0200
Subject: [PATCH 2/2] Fix copy audio dropped segment

---
 transcoder/src/stream.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/transcoder/src/stream.go b/transcoder/src/stream.go
index 9ed8b672..696ae38e 100644
--- a/transcoder/src/stream.go
+++ b/transcoder/src/stream.go
@@ -196,6 +196,9 @@ func (ts *Stream) run(ctx context.Context, start int32) error {
 	end_padding := int32(1)
 	if end == length {
 		end_padding = 0
+	} else if copy_audio {
+		// Copy-audio runs keep one extra overlap segment because we drop it
+		end_padding += 1
 	}
 	segments := ts.keyframes.Slice(start_segment+1, end+end_padding)
 	if len(segments) == 0 {
@@ -344,7 +347,7 @@ func (ts *Stream) run(ctx context.Context, start int32) error {
 				cmd.Process.Signal(os.Interrupt)
 				slog.InfoContext(ctx, "killing ffmpeg because segment already ready", "segment", segment, "encoderId", encoder_id)
 				should_stop = true
-			} else if copy_audio && end < length && segment == end-1 {
+			} else if copy_audio && end < length-1 && segment == end {
 				// Extra overlap segment for copied audio.
 				// Delete the file immediately and stop without closing
 				// the channel, so a real producer can close it later.