Added log levels

Former-commit-id: 6e4e8fbba1

FFMpegCore/FFMpeg/Enums/FFMpegLogLevel.cs

@@ -0,0 +1,15 @@
+namespace FFMpegCore.Enums
+{
+    public enum FFMpegLogLevel
+    {
+        Quiet = 0,
+        Panic = 1,
+        Fatal = 2,
+        Error = 3,
+        Warning = 4,
+        Info = 5,
+        Verbose = 6,
+        Debug = 7,
+        Trace = 8
+    }
+}

FFMpegCore/FFMpeg/FFMpegArgumentProcessor.cs

@@ -21,6 +21,7 @@ public class FFMpegArgumentProcessor
         private Action<string>? _onOutput;
         private Action<string>? _onError;
         private TimeSpan? _totalTimespan;
+        private FFMpegLogLevel? _logLevel;
 
         internal FFMpegArgumentProcessor(FFMpegArguments ffMpegArguments)
         {
@@ -83,12 +84,23 @@ public FFMpegArgumentProcessor Configure(Action<FFOptions> configureOptions)
             _configurations.Add(configureOptions);
             return this;
         }
+
+        /// <summary>
+        /// Sets the log level of this process. Overides the <see cref="FFMpegLogLevel"/>
+        /// that is set in the <see cref="FFOptions"/> for this specific process.
+        /// </summary>
+        /// <param name="logLevel">The log level of the ffmpeg execution.</param>
+        public FFMpegArgumentProcessor WithLogLevel(FFMpegLogLevel logLevel)
+        {
+            _logLevel = logLevel;
+            return this;
+        }
+
         public bool ProcessSynchronously(bool throwOnError = true, FFOptions? ffMpegOptions = null)
         {
             var options = GetConfiguredOptions(ffMpegOptions);
             var processArguments = PrepareProcessArguments(options, out var cancellationTokenSource);
 
-
             IProcessResult? processResult = null;
             try
             {
@@ -193,10 +205,25 @@ private ProcessArguments PrepareProcessArguments(FFOptions ffOptions,
         {
             FFMpegHelper.RootExceptionCheck();
             FFMpegHelper.VerifyFFMpegExists(ffOptions);
+
+            string? arguments = _ffMpegArguments.Text;
+
+            //If local loglevel is null, set the global.
+            if (_logLevel == null)
+                _logLevel = ffOptions.LogLevel;
+
+            //If neither local nor global loglevel is null, set the argument.
+            if (_logLevel != null)
+            {
+                string normalizedLogLevel = _logLevel.ToString()
+                                                     .ToLower();
+                arguments += $" -v {normalizedLogLevel}";
+            }
+
             var startInfo = new ProcessStartInfo
             {
                 FileName = GlobalFFOptions.GetFFMpegBinaryPath(ffOptions),
-                Arguments = _ffMpegArguments.Text,
+                Arguments = arguments,
                 StandardOutputEncoding = ffOptions.Encoding,
                 StandardErrorEncoding = ffOptions.Encoding,
                 WorkingDirectory = ffOptions.WorkingDirectory

FFMpegCore/FFOptions.cs

@@ -1,4 +1,5 @@
-using System;
+using FFMpegCore.Enums;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Text;
@@ -27,6 +28,15 @@ public class FFOptions : ICloneable
         /// </summary>
         public Encoding Encoding { get; set; } = Encoding.Default;
 
+        /// <summary>
+        /// The log level to use when calling of the ffmpeg executable.
+        /// <para>
+        /// This option can be overridden before an execution of a Process command
+        /// to set the log level for that command.
+        /// </para>
+        /// </summary>
+        public FFMpegLogLevel? LogLevel { get; set; }
+
         /// <summary>
         ///
         /// </summary>