Add AudioBitrate as separate Argument

FFMpegCore.Test/ArgumentBuilderTest.cs

@@ -51,8 +51,22 @@ public void Builder_BuildString_Scale()
         [TestMethod]
         public void Builder_BuildString_AudioCodec()
         {
-            var str = GetArgumentsString(new AudioCodecArgument(AudioCodec.Aac, AudioQuality.Normal));
+            var str = GetArgumentsString(new AudioCodecArgument(AudioCodec.Aac));
-            Assert.AreEqual(str, "-i \"input.mp4\" -c:a aac -b:a 128k \"output.mp4\"");
+            Assert.AreEqual(str, "-i \"input.mp4\" -c:a aac \"output.mp4\"");
+        }
+        
+        [TestMethod]
+        public void Builder_BuildString_AudioBitrate()
+        {
+            var str = GetArgumentsString(new AudioBitrateArgument(AudioQuality.Normal));
+            Assert.AreEqual(str, "-i \"input.mp4\" -b:a 128k \"output.mp4\"");
+        }
+        
+        [TestMethod]
+        public void Builder_BuildString_Quiet()
+        {
+            var str = GetArgumentsString(new QuietArgument());
+            Assert.AreEqual(str, "-i \"input.mp4\" -hide_banner -loglevel warning \"output.mp4\"");
         }
 
         [TestMethod]

FFMpegCore/FFMPEG/Argument/Atoms/AudioBitrateArgument.cs

@@ -0,0 +1,19 @@
+using FFMpegCore.FFMPEG.Enums;
+
+namespace FFMpegCore.FFMPEG.Argument
+{
+    /// <summary>
+    /// Represents parameter of audio codec and it's quality
+    /// </summary>
+    public class AudioBitrateArgument : Argument<int>
+    {
+        public AudioBitrateArgument(AudioQuality value) : base((int)value) { }
+        public AudioBitrateArgument(int bitrate) : base(bitrate) { }
+
+        /// <inheritdoc/>
+        public override string GetStringValue()
+        {
+            return $"-b:a {Value}k";
+        }
+    }
+}

FFMpegCore/FFMPEG/Argument/Atoms/AudioCodecArgument.cs

@@ -7,26 +7,12 @@ namespace FFMpegCore.FFMPEG.Argument
     /// </summary>
     public class AudioCodecArgument : Argument<AudioCodec>
     {
-        /// <summary>
-        /// Bitrate of audio channel
-        /// </summary>
-        public int Bitrate { get; } = (int)AudioQuality.Normal;
-
-        public AudioCodecArgument() { }
-
         public AudioCodecArgument(AudioCodec value) : base(value) { }
 
-        public AudioCodecArgument(AudioCodec value, AudioQuality bitrate) : this(value, (int) bitrate) { }
-
-        public AudioCodecArgument(AudioCodec value, int bitrate) : base(value)
-        {
-            Bitrate = bitrate;
-        }
-
         /// <inheritdoc/>
         public override string GetStringValue()
         {
-            return $"-c:a {Value.ToString().ToLower()} -b:a {Bitrate}k";
+            return $"-c:a {Value.ToString().ToLower()}";
         }
     }
 }

FFMpegCore/FFMPEG/Argument/Atoms/QuietArgument.cs

@@ -0,0 +1,10 @@
+namespace FFMpegCore.FFMPEG.Argument
+{
+    public class QuietArgument : Argument
+    {
+        public override string GetStringValue()
+        {
+            return "-hide_banner -loglevel warning";
+        }
+    }
+}

FFMpegCore/FFMPEG/FFMpeg.cs

@@ -149,7 +149,8 @@ public VideoInfo Convert(
                     new ScaleArgument(outputSize),
                     new VideoCodecArgument(VideoCodec.LibX264, 2400),
                     new SpeedArgument(speed),
-                    new AudioCodecArgument(AudioCodec.Aac, audioQuality),
+                    new AudioCodecArgument(AudioCodec.Aac),
+                    new AudioBitrateArgument(audioQuality),
                     new OutputArgument(output))),
                 VideoType.Ogv => Convert(new ArgumentContainer(
                     new InputArgument(source),
@@ -157,7 +158,8 @@ public VideoInfo Convert(
                     new ScaleArgument(outputSize),
                     new VideoCodecArgument(VideoCodec.LibTheora, 2400),
                     new SpeedArgument(speed),
-                    new AudioCodecArgument(AudioCodec.LibVorbis, audioQuality),
+                    new AudioCodecArgument(AudioCodec.LibVorbis),
+                    new AudioBitrateArgument(audioQuality),
                     new OutputArgument(output))),
                 VideoType.Ts => Convert(new ArgumentContainer(
                     new InputArgument(source),
@@ -171,7 +173,8 @@ public VideoInfo Convert(
                     new ScaleArgument(outputSize),
                     new VideoCodecArgument(VideoCodec.LibVpx, 2400),
                     new SpeedArgument(speed),
-                    new AudioCodecArgument(AudioCodec.LibVorbis, audioQuality),
+                    new AudioCodecArgument(AudioCodec.LibVorbis),
+                    new AudioBitrateArgument(audioQuality),
                     new OutputArgument(output))),
                 _ => throw new ArgumentOutOfRangeException(nameof(type))
             };
@@ -194,7 +197,8 @@ public VideoInfo PosterWithAudio(FileInfo image, FileInfo audio, FileInfo output
                 new InputArgument(image.FullName, audio.FullName),
                 new LoopArgument(1),
                 new VideoCodecArgument(VideoCodec.LibX264, 2400),
-                new AudioCodecArgument(AudioCodec.Aac, AudioQuality.Normal),
+                new AudioCodecArgument(AudioCodec.Aac),
+                new AudioBitrateArgument(AudioQuality.Normal),
                 new ShortestArgument(true),
                 new OutputArgument(output)
             );
@@ -375,7 +379,8 @@ public VideoInfo ReplaceAudio(VideoInfo source, FileInfo audio, FileInfo output,
             return Convert(new ArgumentContainer(
                 new InputArgument(source.FullName, audio.FullName),
                 new CopyArgument(),
-                new AudioCodecArgument(AudioCodec.Aac, AudioQuality.Hd),
+                new AudioCodecArgument(AudioCodec.Aac),
+                new AudioBitrateArgument(AudioQuality.Hd),
                 new ShortestArgument(stopAtShortest),
                 new OutputArgument(output)
             ));

FFMpegCore/FFMPEG/FFProbe.cs

@@ -72,7 +72,7 @@ private VideoInfo ParseVideoInfoInternal(VideoInfo info, string probeOutput)
         {
             var metadata = JsonConvert.DeserializeObject<FFMpegStreamMetadata>(probeOutput);
 
-            if (metadata.Streams == null || metadata.Streams.Count == 0)
+            if (metadata?.Streams == null || metadata.Streams.Count == 0)
             {
                 throw new FFMpegException(FFMpegExceptionType.File, $"No video or audio streams could be detected. Source: ${info.FullName}");
             }