From 6003f8f9785880e54c0d2dcede699a4d51abff41 Mon Sep 17 00:00:00 2001
From: Mike Brady <4265913+mikebrady@users.noreply.github.com>
Date: Sat, 30 May 2026 22:40:52 +0100
Subject: [PATCH] Handle input_rate of 0 more correctly.

---
 rtp.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/rtp.c b/rtp.c
index f00f41db..569c8fc3 100644
--- a/rtp.c
+++ b/rtp.c
@@ -1508,17 +1508,11 @@ int frame_to_ptp_local_time(uint32_t timestamp, uint64_t *time, rtsp_conn_info *
   int result = -1;
   uint32_t anchor_rtptime = 0;
   uint64_t anchor_local_time = 0;
-  if (get_ptp_anchor_local_time_info(conn, &anchor_rtptime, &anchor_local_time) == clock_ok) {
+  if ((conn->input_rate != 0) && (get_ptp_anchor_local_time_info(conn, &anchor_rtptime, &anchor_local_time) == clock_ok)) {
     int32_t frame_difference = timestamp - anchor_rtptime;
     int64_t time_difference = frame_difference;
     time_difference = time_difference * 1000000000;
-    if (conn->input_rate == 0) {
-      debug(1, "Connection %d: in a call to frame_to_ptp_local_time, conn->input_rate is zero!",
-            conn->connection_number);
-      time_difference = 0;
-    } else {
-      time_difference = time_difference / conn->input_rate;
-    }
+    time_difference = time_difference / conn->input_rate;
     uint64_t ltime = anchor_local_time + time_difference;
     *time = ltime;
     result = 0;
@@ -1532,7 +1526,7 @@ int local_ptp_time_to_frame(uint64_t time, uint32_t *frame, rtsp_conn_info *conn
   int result = -1;
   uint32_t anchor_rtptime = 0;
   uint64_t anchor_local_time = 0;
-  if (get_ptp_anchor_local_time_info(conn, &anchor_rtptime, &anchor_local_time) == clock_ok) {
+  if ((conn->input_rate != 0) && (get_ptp_anchor_local_time_info(conn, &anchor_rtptime, &anchor_local_time) == clock_ok)) {
     int64_t time_difference = time - anchor_local_time;
     int64_t frame_difference = time_difference;
     frame_difference = frame_difference * conn->input_rate; // but this is by 10^9