From 1b7b836b3e370f780130e8325e9b4a63a2102b1e Mon Sep 17 00:00:00 2001
From: Duncan Tourolle <duncan@tourolle.paris>
Date: Mon, 15 Dec 2025 20:43:49 +0100
Subject: [PATCH] When streaming start from current location

---
 .../Services/LmsSessionController.cs          | 24 +++++++++++--------
 1 file changed, 14 insertions(+), 10 deletions(-)

diff --git a/Jellyfin.Plugin.JellyLMS/Services/LmsSessionController.cs b/Jellyfin.Plugin.JellyLMS/Services/LmsSessionController.cs
index 9d8b31c..2392328 100644
--- a/Jellyfin.Plugin.JellyLMS/Services/LmsSessionController.cs
+++ b/Jellyfin.Plugin.JellyLMS/Services/LmsSessionController.cs
@@ -172,8 +172,15 @@ public class LmsSessionController : ISessionController, IDisposable
         var itemId = _playlist[index];
         _playlistIndex = index;
 
-        var streamUrl = BuildStreamUrl(itemId);
-        _logger.LogInformation("Playing item {Index}/{Total}: {Url}", index + 1, _playlist.Length, streamUrl);
+        // Build stream URL with start position - LMS can't seek on HTTP streams,
+        // so we need to use Jellyfin's startTimeTicks parameter for transcoding
+        var streamUrl = BuildStreamUrlWithPosition(itemId, startPositionTicks);
+        _logger.LogInformation(
+            "Playing item {Index}/{Total} from position {Position}s: {Url}",
+            index + 1,
+            _playlist.Length,
+            startPositionTicks / TimeSpan.TicksPerSecond,
+            streamUrl);
 
         await _lmsClient.PlayUrlAsync(_player.MacAddress, streamUrl).ConfigureAwait(false);
 
@@ -181,18 +188,15 @@ public class LmsSessionController : ISessionController, IDisposable
         CurrentItemId = itemId;
         IsPlaying = true;
         IsPaused = false;
-        _seekOffsetTicks = 0; // Reset seek offset when starting a new track
+
+        // Track the seek offset so we report the correct position
+        // When starting from a position, the transcoded stream starts at 0,
+        // but we need to report the actual track position
+        _seekOffsetTicks = startPositionTicks;
 
         // Look up the item for duration info
         _currentItem = _libraryManager.GetItemById(itemId);
 
-        // Seek to start position if specified
-        if (startPositionTicks > 0)
-        {
-            var positionSeconds = startPositionTicks / TimeSpan.TicksPerSecond;
-            await _lmsClient.SeekAsync(_player.MacAddress, positionSeconds).ConfigureAwait(false);
-        }
-
         // Report playback start to Jellyfin
         await ReportPlaybackStartAsync(itemId, startPositionTicks).ConfigureAwait(false);