Add ID constant for all parameters

src/main/java/com/annimon/ffmpegbot/parameters/AudioBitrate.java

@@ -5,13 +5,14 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class AudioBitrate extends StringParameter {
+    public static final String ID = "abitrate";
     private static final List<String> VALUES = List.of(
             "4k", "16k", "32k", "", "64k", "128k",
             "256k", "320k", "512k"
     );
 
     public AudioBitrate() {
-        super("abitrate", "\uD83D\uDD08 Bitrate", VALUES, "");
+        super(ID, "\uD83D\uDD08 Bitrate", VALUES, "");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/AudioCrystalizer.java

@@ -4,12 +4,13 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class AudioCrystalizer extends StringParameter {
+    public static final String ID = "crystalizer";
     private static final List<String> VALUES = List.of(
             "-8", "-4", "-2", "0", "2", "4", "8"
     );
 
     public AudioCrystalizer() {
-        super("crystalizer", "\uD83D\uDD08 Crystalizer", VALUES, "0");
+        super(ID, "\uD83D\uDD08 Crystalizer", VALUES, "0");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/AudioEffect.java

@@ -5,6 +5,8 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class AudioEffect extends StringParameter {
+    public static final String ID = "aeffect";
+
     public static final String ROBOT = "Robot";
     public static final String ECHO = "Echo";
     public static final String ECHO_2 = "Echo 2";
@@ -18,7 +20,7 @@ public class AudioEffect extends StringParameter {
     );
 
     public AudioEffect() {
-        super("aeffect", "\uD83D\uDD08 Effect", VALUES, "");
+        super(ID, "\uD83D\uDD08 Effect", VALUES, "");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/AudioPitch.java

@@ -5,6 +5,7 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class AudioPitch extends StringParameter {
+    public static final String ID = "apitch";
     private static final List<String> VALUES = List.of(
             "0.6", "0.8", "0.9",
             "1",
@@ -12,7 +13,7 @@ public class AudioPitch extends StringParameter {
     );
 
     public AudioPitch() {
-        super("apitch", "\uD83D\uDD08 Pitch", VALUES, "1");
+        super(ID, "\uD83D\uDD08 Pitch", VALUES, "1");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/AudioStreamByLanguage.java

@@ -5,12 +5,13 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class AudioStreamByLanguage extends StringParameter {
+    public static final String ID = "asellang";
     private static final List<String> VALUES = List.of(
             "", "eng", "fra", "ita", "ukr", "spa"
     );
 
     public AudioStreamByLanguage() {
-        super("asellang", "Audio Track", VALUES, "");
+        super(ID, "Audio Track", VALUES, "");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/AudioVolume.java

@@ -5,6 +5,7 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class AudioVolume extends StringParameter {
+    public static final String ID = "volume";
     private static final List<String> VALUES = List.of(
             "-15dB", "-10dB", "-5dB", "-2dB",
             "", "2dB", "5dB", "10dB",
@@ -12,7 +13,7 @@ public class AudioVolume extends StringParameter {
     );
 
     public AudioVolume() {
-        super("volume", "\uD83D\uDD08 Volume", VALUES, "");
+        super(ID, "\uD83D\uDD08 Volume", VALUES, "");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/Contrast.java

@@ -4,6 +4,7 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class Contrast extends StringParameter {
+    public static final String ID = "contrast";
     private static final List<String> VALUES = List.of(
             "0.4", "0.6", "0.8",
             "1", "1.2", "1.4", "1.6",
@@ -11,7 +12,7 @@ public class Contrast extends StringParameter {
     );
 
     public Contrast() {
-        super("contrast", "Contrast", VALUES, "1");
+        super(ID, "Contrast", VALUES, "1");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/DisableAudio.java

@@ -3,8 +3,10 @@ package com.annimon.ffmpegbot.parameters;
 import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 
 public class DisableAudio extends BooleanParameter {
+    public static final String ID = "noaud";
+
     public DisableAudio() {
-        super("noaud", "Disable audio", false);
+        super(ID, "Disable audio", false);
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/Gamma.java

@@ -4,6 +4,7 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class Gamma extends StringParameter {
+    public static final String ID = "gamma";
     private static final List<String> VALUES = List.of(
             "0.2", "0.4", "0.6", "0.8",
             "1", "1.2", "1.4", "1.6",
@@ -11,7 +12,7 @@ public class Gamma extends StringParameter {
     );
 
     public Gamma() {
-        super("gamma", "Gamma", VALUES, "1");
+        super(ID, "Gamma", VALUES, "1");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/OutputFormat.java

@@ -5,12 +5,14 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class OutputFormat extends StringParameter {
+    public static final String ID = "output";
+
     public static final String VIDEO = "VIDEO";
     public static final String AUDIO = "AUDIO";
     public static final String VIDEO_NOTE = "VIDEO NOTE";
 
     public OutputFormat(List<String> values, String initialValue) {
-        super("output", "➡\uFE0F Output", values, initialValue);
+        super(ID, "➡\uFE0F Output", values, initialValue);
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/Parameters.java

@@ -5,29 +5,41 @@ import java.util.*;
 
 public class Parameters extends AbstractCollection<Parameter<?>> {
 
-    private final Map<String, Parameter<?>> parameters;
+    private final Map<String, Parameter<?>> enabledParameters;
+    private final Map<String, Parameter<?>> disabledParameters;
 
     public Parameters() {
-        parameters = new LinkedHashMap<>();
+        enabledParameters = new LinkedHashMap<>();
+        disabledParameters = new LinkedHashMap<>();
     }
 
     @Override
     public boolean add(Parameter<?> parameter) {
-        return !Objects.equals(parameter, parameters.put(parameter.id, parameter));
+        return !Objects.equals(parameter, enabledParameters.put(parameter.id, parameter));
     }
 
     public Parameter<?> findById(String id) {
-        return parameters.get(id);
+        return enabledParameters.get(id);
+    }
+
+    public void disable(String id) {
+        Optional.ofNullable(findById(id))
+                .ifPresent(p -> disabledParameters.put(p.id, p));
+    }
+
+    public void enable(String id) {
+        Optional.ofNullable(disabledParameters.get(id))
+                .ifPresent(this::add);
     }
 
     @NotNull
     @Override
     public Iterator<Parameter<?>> iterator() {
-        return parameters.values().iterator();
+        return enabledParameters.values().iterator();
     }
 
     @Override
     public int size() {
-        return parameters.size();
+        return enabledParameters.size();
     }
 }

src/main/java/com/annimon/ffmpegbot/parameters/Saturation.java

@@ -4,6 +4,7 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class Saturation extends StringParameter {
+    public static final String ID = "saturation";
     private static final List<String> VALUES = List.of(
             "0", "0.25", "0.5", "0.75",
             "1", "1.25", "1.5", "1.75",
@@ -11,7 +12,7 @@ public class Saturation extends StringParameter {
     );
 
     public Saturation() {
-        super("saturation", "Saturation", VALUES, "1");
+        super(ID, "Saturation", VALUES, "1");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/SpeedFactor.java

@@ -5,6 +5,7 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class SpeedFactor extends StringParameter {
+    public static final String ID = "speed";
     private static final List<String> VALUES = List.of(
             "0.5", "0.75", "0.8", "0.9",
             "1", "1.25", "1.4", "1.5",
@@ -12,7 +13,7 @@ public class SpeedFactor extends StringParameter {
     );
 
     public SpeedFactor() {
-        super("speed", "Speed", VALUES, "1");
+        super(ID, "Speed", VALUES, "1");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/VideoBitrate.java

@@ -5,13 +5,14 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class VideoBitrate extends StringParameter {
+    public static final String ID = "vbitrate";
     private static final List<String> VALUES = List.of(
             "16k", "32k", "", "64k", "128k", "256k",
             "512k", "1M", "2M", "4M", "8M", "16M"
     );
 
     public VideoBitrate() {
-        super("vbitrate", "Video bitrate", VALUES, "");
+        super(ID, "Video bitrate", VALUES, "");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/VideoFrameRate.java

@@ -5,12 +5,13 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class VideoFrameRate extends StringParameter {
+    public static final String ID = "vfr";
     private static final List<String> VALUES = List.of(
             "5", "10", "15", "20", "25", "", "30", "45", "60"
     );
 
     public VideoFrameRate() {
-        super("vfr", "Frame rate",  VALUES, "");
+        super(ID, "Frame rate",  VALUES, "");
     }
 
     @Override

src/main/java/com/annimon/ffmpegbot/parameters/VideoScale.java

@@ -5,12 +5,13 @@ import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
 import java.util.List;
 
 public class VideoScale extends StringParameter {
+    public static final String ID = "scale";
     private static final List<String> VALUES = List.of(
             "144", "240", "360", "", "480", "720", "1080"
     );
 
     public VideoScale() {
-        super("scale", "Scale", VALUES, "");
+        super(ID, "Scale", VALUES, "");
     }
 
     @Override