From 85e25ca6eaed01b00dc4b8be1de3c80e81c09a86 Mon Sep 17 00:00:00 2001
From: Jason Dove <1695733+jasongdove@users.noreply.github.com>
Date: Wed, 3 Dec 2025 10:16:09 -0600
Subject: [PATCH] add channel start time template data (#2698)

* add channel start time template data

* rename
---
 CHANGELOG.md                                                | 2 ++
 ErsatzTV.Core/Metadata/ChannelTemplateDataKey.cs            | 6 ++++++
 .../Streaming/Graphics/GraphicsElementLoader.cs             | 1 +
 3 files changed, 9 insertions(+)
 create mode 100644 ErsatzTV.Core/Metadata/ChannelTemplateDataKey.cs

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 130bb60f5..fe50d5826 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - Add framerate template data
     - `RFrameRate` - the real content framerate (or channel normalized framerate) as reported by ffmpeg, e.g. `30000/1001`
     - `FrameRate` - the decimal representation of `RFrameRate`, e.g. `29.97002997`
+  - Add `Channel_StartTime` template data
+    - This indicates the time that the transcode session started for the current channel
 - Add remote stream metadata
   - Remote stream definitions (yaml files) can now contain `title`, `plot`, `year` and `content_rating` fields
   - Remote streams can now have thumbnails (same name as yaml file but with image extension)
diff --git a/ErsatzTV.Core/Metadata/ChannelTemplateDataKey.cs b/ErsatzTV.Core/Metadata/ChannelTemplateDataKey.cs
new file mode 100644
index 000000000..7cd0fa084
--- /dev/null
+++ b/ErsatzTV.Core/Metadata/ChannelTemplateDataKey.cs
@@ -0,0 +1,6 @@
+namespace ErsatzTV.Core.Metadata;
+
+public static class ChannelTemplateDataKey
+{
+    public static readonly string ChannelStartTime = "Channel_StartTime";
+}
diff --git a/ErsatzTV.Infrastructure/Streaming/Graphics/GraphicsElementLoader.cs b/ErsatzTV.Infrastructure/Streaming/Graphics/GraphicsElementLoader.cs
index 039089d4a..754ad7d61 100644
--- a/ErsatzTV.Infrastructure/Streaming/Graphics/GraphicsElementLoader.cs
+++ b/ErsatzTV.Infrastructure/Streaming/Graphics/GraphicsElementLoader.cs
@@ -249,6 +249,7 @@ public partial class GraphicsElementLoader(
             [FFmpegProfileTemplateDataKey.ScaledResolution] = context.SquarePixelFrameSize,
             [FFmpegProfileTemplateDataKey.RFrameRate] = context.FrameRate.RFrameRate,
             [FFmpegProfileTemplateDataKey.FrameRate] = context.FrameRate.ParsedFrameRate,
+            [ChannelTemplateDataKey.ChannelStartTime] = context.ChannelStartTime,
             [MediaItemTemplateDataKey.StreamSeek] = context.Seek,
             [MediaItemTemplateDataKey.Start] = context.ContentStartTime,
             [MediaItemTemplateDataKey.Stop] = context.ContentStartTime + context.Duration