fix hls segmenter bug with unknown packet duration

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
+### Fixed
+- Fix `HLS Segmenter` bug when source video packet contains no duration (`N/A`)
 
 ## [0.4.1-alpha] - 2022-02-10
 ### Fixed

ErsatzTV.Application/Streaming/PtsAndDuration.cs

@@ -6,7 +6,11 @@ public record PtsAndDuration(long Pts, long Duration)
     {
         string[] split = ffprobeLine.Split("|");
         var left = long.Parse(split[0]);
-        var right = long.Parse(split[1]);
+        if (!long.TryParse(split[1], out long right))
+        {
+            // some durations are N/A, so we have to guess at something
+            right = 10_000;
+        }
         return new PtsAndDuration(left, right);
     }
 }