Fix issue with Jellyfin using local IP adress not server public URL, now pulic URL is set in plugin.

Jellyfin.Plugin.SRFPlay/Controllers/StreamProxyController.cs

@@ -53,7 +53,13 @@ public class StreamProxyController : ControllerBase
         try
         {
             // Build the base proxy URL for this item (use original itemId from path to maintain URL structure)
-            var baseProxyUrl = $"{Request.Scheme}://{Request.Host}/Plugins/SRFPlay/Proxy/{itemId}";
+            // Always include the actualItemId as a query parameter to ensure proper resolution during transcoding
+            var baseProxyUrl = $"{Request.Scheme}://{Request.Host}/Plugins/SRFPlay/Proxy/{itemId}?itemId={actualItemId}";
+
+            if (actualItemId != itemId)
+            {
+                _logger.LogDebug("Path itemId {PathId} differs from resolved itemId {ResolvedId}, adding query parameter", itemId, actualItemId);
+            }
 
             var manifestContent = await _proxyService.GetRewrittenManifestAsync(actualItemId, baseProxyUrl, cancellationToken).ConfigureAwait(false);
 
@@ -179,7 +185,9 @@ public class StreamProxyController : ControllerBase
             return queryItemId.ToString();
         }
 
-        // Use the path item ID as-is
+        // If path ID and query ID don't match, it's likely a transcoding session
+        // Try to use the proxy service fallback to find the correct stream
+        _logger.LogDebug("No itemId query parameter found, using path ID as-is: {PathItemId}", pathItemId);
         return pathItemId;
     }
 
@@ -191,6 +199,11 @@ public class StreamProxyController : ControllerBase
     /// <returns>The rewritten manifest.</returns>
     private string RewriteSegmentUrls(string manifestContent, string baseProxyUrl)
     {
+        // Extract the itemId query parameter from the current request to propagate it
+        var itemIdParam = Request.Query.TryGetValue("itemId", out var itemId) && !string.IsNullOrEmpty(itemId)
+            ? $"?itemId={itemId}"
+            : string.Empty;
+
         var lines = manifestContent.Split('\n');
         var result = new System.Text.StringBuilder();
 
@@ -207,12 +220,12 @@ public class StreamProxyController : ControllerBase
                 var uri = new Uri(line.Trim());
                 var segments = uri.AbsolutePath.Split('/');
                 var fileName = segments[^1];
-                result.AppendLine(CultureInfo.InvariantCulture, $"{baseProxyUrl}/{fileName}");
+                result.AppendLine(CultureInfo.InvariantCulture, $"{baseProxyUrl}/{fileName}{itemIdParam}");
             }
             else
             {
                 // Relative URL - rewrite to proxy
-                result.AppendLine(CultureInfo.InvariantCulture, $"{baseProxyUrl}/{line.Trim()}");
+                result.AppendLine(CultureInfo.InvariantCulture, $"{baseProxyUrl}/{line.Trim()}{itemIdParam}");
             }
         }