feat: trying to create clips...probs a waste of time grrrrrrr

src/StreamShorts.Library/Media/FFMpegService.cs

@@ -1,3 +1,4 @@
+
 using FFMpegCore;
 using FFMpegCore.Enums;
 using FFMpegCore.Pipes;
@@ -21,4 +22,20 @@ internal sealed class FFMpegService : IVideoService
       .ProcessAsynchronously()
       .ConfigureAwait(false);
   }
+
+  public async Task<Stream> ExtractClipFromVideoAsync(Stream video, TimeSpan start, TimeSpan end, TimeSpan? buffer = null)
+  {
+    var startTime = start - (buffer ?? TimeSpan.Zero);
+    var endTime = end + (buffer ?? TimeSpan.Zero);
+    var outputStream = new MemoryStream();
+
+    await FFMpegArguments
+      .FromPipeInput(new StreamPipeSource(video), o => o.Seek(startTime).EndSeek(endTime))
+      .OutputToPipe(new StreamPipeSink(outputStream), o => o.CopyChannel().ForceFormat("webm"))
+      .ProcessAsynchronously()
+      .ConfigureAwait(false);
+
+    outputStream.Position = 0;
+    return outputStream;
+  }
 }