From 1cac2107656be607a754a420cc10ae92ab4c5beb Mon Sep 17 00:00:00 2001
From: Jason Dove <1695733+jasongdove@users.noreply.github.com>
Date: Mon, 11 Aug 2025 15:00:25 +0000
Subject: [PATCH] fix segmenter v2 transitions (#2296)

---
 ErsatzTV/Controllers/InternalController.cs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ErsatzTV/Controllers/InternalController.cs b/ErsatzTV/Controllers/InternalController.cs
index 68824a11..a252cab0 100644
--- a/ErsatzTV/Controllers/InternalController.cs
+++ b/ErsatzTV/Controllers/InternalController.cs
@@ -340,12 +340,18 @@ public class InternalController : ControllerBase
                     linkedCts.Token);
             }
 
-            _ = processWithPipe
+            var task = processWithPipe
                 .WithStandardOutputPipe(PipeTarget.ToStream(pipe.Writer.AsStream()))
                 .WithStandardErrorPipe(PipeTarget.ToStringBuilder(stdErrBuffer))
                 .WithValidation(CommandResultValidation.None)
                 .ExecuteAsync(linkedCts.Token);
 
+            // ensure pipe writer is completed when ffmpeg exits
+            _ = task.Task.ContinueWith(
+                (_, state) => ((PipeWriter)state!).Complete(),
+                pipe.Writer,
+                TaskScheduler.Default);
+
             var contentType = mode switch
             {
                 "segmenter-v2" => "video/x-matroska",