From da8e8411e73c7bb8dc71e0afa25755431dedddcf Mon Sep 17 00:00:00 2001
From: Jason Dove <jason@jasondove.me>
Date: Sun, 7 Mar 2021 15:13:33 -0600
Subject: [PATCH] add text to offline stream

---
 ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs | 11 +++++++----
 ErsatzTV.Core/FFmpeg/FFmpegProcessService.cs |  5 +----
 ErsatzTV/ErsatzTV.csproj                     |  3 +++
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs b/ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs
index bdc53f3e0..9fbacad45 100644
--- a/ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs
+++ b/ErsatzTV.Core/FFmpeg/FFmpegProcessBuilder.cs
@@ -213,15 +213,18 @@ namespace ErsatzTV.Core.FFmpeg
             return this;
         }
 
-        public FFmpegProcessBuilder WithText(string text)
+        public FFmpegProcessBuilder WithErrorText(IDisplaySize desiredResolution, string text)
         {
             const string FONT_FILE = "fontfile=Resources/Roboto-Regular.ttf";
-            const string FONT_SIZE = "fontsize=30";
+            const string FONT_SIZE = "fontsize=60";
             const string FONT_COLOR = "fontcolor=white";
             const string X = "x=(w-text_w)/2";
-            const string Y = "y=(h-text_h)/2";
+            const string Y = "y=(h-text_h)/3*2";
 
-            return WithFiltergraph($"drawtext={FONT_FILE}:{FONT_SIZE}:{FONT_COLOR}:{X}:{Y}:text='{text}'");
+            return WithFilterComplex(
+                $"[0:0]scale={desiredResolution.Width}:{desiredResolution.Height},drawtext={FONT_FILE}:{FONT_SIZE}:{FONT_COLOR}:{X}:{Y}:text='{text}'[v]",
+                "[v]",
+                "1:a");
         }
 
         public FFmpegProcessBuilder WithDuration(TimeSpan duration) =>
diff --git a/ErsatzTV.Core/FFmpeg/FFmpegProcessService.cs b/ErsatzTV.Core/FFmpeg/FFmpegProcessService.cs
index d93b7fae3..3c8de1e34 100644
--- a/ErsatzTV.Core/FFmpeg/FFmpegProcessService.cs
+++ b/ErsatzTV.Core/FFmpeg/FFmpegProcessService.cs
@@ -98,10 +98,7 @@ namespace ErsatzTV.Core.FFmpeg
                 .WithLoopedImage("Resources/background.png")
                 .WithLibavfilter()
                 .WithInput("anullsrc")
-                .WithFilterComplex(
-                    $"[0:0]scale={desiredResolution.Width}:{desiredResolution.Height}[video]",
-                    "[video]",
-                    "1:a")
+                .WithErrorText(desiredResolution, "Channel is Offline")
                 .WithPixfmt("yuv420p")
                 .WithPlaybackArgs(playbackSettings)
                 .WithMetadata(channel)
diff --git a/ErsatzTV/ErsatzTV.csproj b/ErsatzTV/ErsatzTV.csproj
index 2384ef904..826435055 100644
--- a/ErsatzTV/ErsatzTV.csproj
+++ b/ErsatzTV/ErsatzTV.csproj
@@ -40,6 +40,9 @@
       <None Update="Resources\background.png">
         <CopyToOutputDirectory>Always</CopyToOutputDirectory>
       </None>
+      <None Update="Resources\Roboto-Regular.ttf">
+        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+      </None>
     </ItemGroup>
 
 </Project>