Logging improvements

Code/IO/Logger.cs

@@ -27,7 +27,7 @@ namespace Flowframes
 
             try
             {
-                if (replaceLastLine)
+                if (!hidden && replaceLastLine)
                 {
                     textbox.Suspend();
                     string[] lines = textbox.Text.SplitIntoLines();

Code/Media/AvProcess.cs

@@ -104,7 +104,7 @@ namespace Flowframes
 
             bool hidden = currentLogMode == LogMode.Hidden;
 
-            if (line.MatchesWildcard("*can produce invalid output*")) // Don't print this kind of warning
+            if (HideMessage(line)) // Don't print certain warnings 
                 hidden = true;
 
             bool replaceLastLine = currentLogMode == LogMode.OnlyLastLine;
@@ -127,6 +127,17 @@ namespace Flowframes
             }
         }
 
+        static bool HideMessage (string msg)
+        {
+            string[] hiddenMsgs = new string[] { "can produce invalid output", "deprecated pixel format" };
+
+            foreach (string str in hiddenMsgs)
+                if (msg.MatchesWildcard($"*{str}*"))
+                    return true;
+
+            return false;
+        }
+
         static void FfmpegOutputHandlerSilent (object sendingProcess, DataReceivedEventArgs outLine)
         {
             timeSinceLastOutput.Restart();

Code/Media/FfmpegExtract.cs

@@ -54,7 +54,7 @@ namespace Flowframes.Media
 
             if (extension.Contains("jpg"))
             {
-                string pixFmt = "-pix_fmt yuvj420p";
+                string pixFmt = "-pix_fmt yuv420p";
                 return $"-q:v 1 {pixFmt}";
             }