Fix high single thread usage in throttler

this requires jellyfin-ffmpeg >= 5.0.1-8

MediaBrowser.Controller/MediaEncoding/IMediaEncoder.cs

@@ -37,6 +37,12 @@ namespace MediaBrowser.Controller.MediaEncoding
         /// <returns>The version of encoder.</returns>
         Version EncoderVersion { get; }
 
+        /// <summary>
+        /// Whether p key pausing is supported.
+        /// </summary>
+        /// <value><c>true</c> if p key pausing is supported, <c>false</c> otherwise.</value>
+        bool IsPkeyPauseSupported { get; }
+
         /// <summary>
         /// Gets a value indicating whether the configured Vaapi device is from AMD(radeonsi/r600 Mesa driver).
         /// </summary>