From 6c756a256908c8a72bef4b2bf3f82eb5830375f7 Mon Sep 17 00:00:00 2001
From: Deivid Soto <hello@torrentclaw.com>
Date: Wed, 10 Jun 2026 23:51:14 +0200
Subject: [PATCH] fix(stream): EXT-X-START=0 en el playlist copy mientras crece
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Hasta que llega ENDLIST la sesión copy es un EVENT creciente y algunos
players nativos (iOS) tratan un playlist sin terminar como LIVE: se
enganchan al borde en vez de a la posición 0. EXT-X-START:TIME-OFFSET=0
(RFC 8216 §4.3.5.2) fija el arranque explícitamente; inofensivo cuando el
playlist ya es final. Coincide con el patrón observado: episodios cortos
(ENDLIST en segundos) reproducían en iPhone, películas (EVENT durante
minutos) no.
---
 internal/engine/hls.go | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/internal/engine/hls.go b/internal/engine/hls.go
index cf9c506..fc5a297 100644
--- a/internal/engine/hls.go
+++ b/internal/engine/hls.go
@@ -1212,7 +1212,18 @@ func (s *HLSSession) serveCopyPlaylist(w http.ResponseWriter, r *http.Request) {
 	for {
 		data, err := os.ReadFile(path)
 		if err == nil && len(data) > 0 {
-			_, _ = w.Write(data)
+			// Until ENDLIST lands a copy session is a growing EVENT playlist,
+			// and some native players (iOS) treat any not-yet-ended playlist
+			// like LIVE and join at the live edge instead of position 0.
+			// EXT-X-START pins the start to 0 explicitly (RFC 8216 §4.3.5.2);
+			// harmless once the playlist is final.
+			out := data
+			if !strings.Contains(string(data), "#EXT-X-START") {
+				out = []byte(strings.Replace(string(data),
+					"#EXT-X-VERSION:7\n",
+					"#EXT-X-VERSION:7\n#EXT-X-START:TIME-OFFSET=0,PRECISE=YES\n", 1))
+			}
+			_, _ = w.Write(out)
 			return
 		}
 		if r.Context().Err() != nil || time.Now().After(deadline) {