From 6ba70f5da827b90285ba68d2ebaf7d2d4f4748d2 Mon Sep 17 00:00:00 2001
From: Edward Hervey <edward@centricular.com>
Date: Tue, 12 Nov 2024 09:01:49 +0100
Subject: [PATCH] mpegtsmux: Post error on the bus if no mapping is found

This is more useful/visible

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7707>
---
 subprojects/gst-plugins-bad/gst/mpegtsmux/gstbasetsmux.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/subprojects/gst-plugins-bad/gst/mpegtsmux/gstbasetsmux.c b/subprojects/gst-plugins-bad/gst/mpegtsmux/gstbasetsmux.c
index eec5025ee2..0a52836e55 100644
--- a/subprojects/gst-plugins-bad/gst/mpegtsmux/gstbasetsmux.c
+++ b/subprojects/gst-plugins-bad/gst/mpegtsmux/gstbasetsmux.c
@@ -945,7 +945,10 @@ gst_base_ts_mux_create_or_update_stream (GstBaseTsMux * mux,
   }
 
   if (st == TSMUX_ST_RESERVED) {
-    GST_ERROR_OBJECT (ts_pad, "Failed to determine stream type");
+    GST_ELEMENT_ERROR (mux, STREAM, MUX,
+        ("Failed to determine stream type or mapping is not supported"),
+        ("If you're using an experimental or non-standard mapping you may have to "
+            "set the enable-custom-mappings property to TRUE."));
     goto error;
   }