randomize cover art placement (#507)

CHANGELOG.md

@@ -9,6 +9,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Show song artist in playout detail
 - Include song artist and cover art in channel guide (xmltv)
 
+### Changed
+- Randomly place song cover art on left or right side of screen
+
 ## [0.3.0-alpha] - 2021-11-25
 ### Fixed
 - Properly fix database incompatibility introduced with `v0.2.4-alpha` and partially fixed with `v0.2.5-alpha`

ErsatzTV.Core/FFmpeg/FFmpegComplexFilterBuilder.cs

@@ -118,9 +118,27 @@ namespace ErsatzTV.Core.FFmpeg
                             .Replace(@":/", @"\\:/");
                     }
 
-                    // TODO: calculate by percent
+                    var horizontalMarginPercent = 3;
+                    const int VERTICAL_MARGIN_PERCENT = 14;
+
+                    foreach (ChannelWatermark watermark in _watermark)
+                    {
+                        horizontalMarginPercent = watermark.HorizontalMarginPercent;
+                        switch (watermark.Location)
+                        {
+                            case ChannelWatermarkLocation.BottomLeft:
+                                horizontalMarginPercent += watermark.WidthPercent + watermark.HorizontalMarginPercent;
+                                break;
+                        }
+                    }
+
+                    double horizontalMargin = Math.Round(horizontalMarginPercent / 100.0 * _resolution.Width);
+                    double verticalMargin = Math.Round(VERTICAL_MARGIN_PERCENT / 100.0 * _resolution.Height);
+
+                    var location = $"x={horizontalMargin}:y=H-{verticalMargin}";
+
                     _drawtext =
-                        $"drawtext=fontfile={fontPath}:textfile={effectiveFile}:x=50:y=H-175:fontsize=36:fontcolor=white";
+                        $"drawtext=fontfile={fontPath}:textfile={effectiveFile}:{location}:fontsize=36:fontcolor=white";
                 }
             }
 

ErsatzTV.Core/FFmpeg/FFmpegProcessService.cs

@@ -19,6 +19,7 @@ namespace ErsatzTV.Core.FFmpeg
         private readonly ITempFilePool _tempFilePool;
         private readonly ILogger<FFmpegProcessService> _logger;
         private readonly FFmpegPlaybackSettingsCalculator _playbackSettingsCalculator;
+        private readonly Random _random = new();
 
         public FFmpegProcessService(
             FFmpegPlaybackSettingsCalculator ffmpegPlaybackSettingsService,
@@ -270,7 +271,6 @@ namespace ErsatzTV.Core.FFmpeg
                     .WithThreads(1)
                     .WithQuiet()
                     .WithFormatFlags(playbackSettings.FormatFlags)
-                    .WithRealtimeOutput(playbackSettings.RealtimeOutput)
                     .WithSongInput(videoPath, videoStream.Codec, videoStream.PixelFormat)
                     .WithWatermark(watermarkOptions, channel.FFmpegProfile.Resolution)
                     .WithDrawtextFile(videoVersion, drawtextFile);
@@ -330,7 +330,9 @@ namespace ErsatzTV.Core.FFmpeg
                     Mode = ChannelWatermarkMode.Permanent,
                     HorizontalMarginPercent = 3,
                     VerticalMarginPercent = 5,
-                    Location = ChannelWatermarkLocation.BottomRight,
+                    Location = _random.Next() % 2 == 0
+                        ? ChannelWatermarkLocation.BottomRight
+                        : ChannelWatermarkLocation.BottomLeft,
                     Size = ChannelWatermarkSize.Scaled,
                     WidthPercent = 25,
                     Opacity = 100