Rewrites a lot of code

Streams are now parsed to objects, making it easier to get required information.
Improved styling.
Some better comments.
Better input parsing.

src/ffmpegconverter/streams/AudioStream.java

@@ -0,0 +1,29 @@
+package ffmpegconverter.streams;
+
+public class AudioStream extends StreamObject {
+    private String language; //The audio language
+    private int channels; //Whether mono, stereo, etc
+    private String title; //Titles exist
+
+    public AudioStream(String codec, int absoluteIndex, int relativeIndex, String language, String title, int channels) {
+        this.codecType = "audio";
+        this.codecName = codec;
+        this.absoluteIndex = absoluteIndex;
+        this.language = language;
+        this.title = title;
+        this.relativeIndex = relativeIndex;
+        this.channels = channels;
+    }
+
+    public String getLanguage() {
+        return this.language;
+    }
+
+    public int getChannels() {
+        return this.channels;
+    }
+
+    public String getTitle() {
+        return this.title;
+    }
+}

src/ffmpegconverter/streams/StreamObject.java

@@ -0,0 +1,43 @@
+package ffmpegconverter.streams;
+
+/**
+ * An object representation of a stream in a media file
+ */
+public abstract class StreamObject {
+    int absoluteIndex;
+    int relativeIndex;
+    String codecName;
+    String codecType;
+
+    /**
+     * Gets the type of the stream codec (video/audio/subtitle)
+     * @return codec type
+     */
+    public String getCodecType() {
+        return this.codecType;
+    }
+
+    /**
+     * Gets the name of the stream codec
+     * @return codec name
+     */
+    public String getCodecName() {
+        return this.codecName;
+    }
+
+    /**
+     * Gets the absolute index of a stream object
+     * @return absolute index
+     */
+    public int getAbsoluteIndex() {
+        return this.absoluteIndex;
+    }
+
+    /**
+     * Gets the relative index of a stream object (kth element of codec type)
+     * @return relative index
+     */
+    public int getRelativeIndex() {
+        return this.relativeIndex;
+    }
+}

src/ffmpegconverter/streams/SubtitleStream.java

@@ -0,0 +1,59 @@
+package ffmpegconverter.streams;
+
+/**
+ * An object representation of a subtitle stream in a media file
+ */
+public class SubtitleStream extends StreamObject {
+    private String language;
+    private String title; //Title shown
+    private boolean isFullSubtitle; //Songs and signs will be false
+    private boolean isImageSubtitle;
+
+    public SubtitleStream(String codecName, int absoluteIndex, int relativeIndex, String language, String title) {
+        this.codecType = "subtitle";
+        this.codecName = codecName;
+        this.absoluteIndex = absoluteIndex;
+        this.language = language;
+        this.title = title;
+        this.isFullSubtitle = isFullSubtitle();
+        this.relativeIndex = relativeIndex;
+        this.isImageSubtitle = isImageSubtitle();
+    }
+
+    /**
+     * Checks whether a subtitle is image based (as opposed to text based)
+     * @return True if the subtitle is image based
+     */
+    private boolean isImageSubtitle() {
+        return codecName != null && getCodecName().equals("hdmv_pgs_subtitle");
+    }
+
+    /**
+     * Checks whether translates everything (as opposed to just songs and signs)
+     * @return True if the subtitles translate everything
+     */
+    private boolean isFullSubtitle() {
+        if (getTitle() == null) {
+            return false;
+        }
+        String title = getTitle().toLowerCase();
+        return !(title.contains("songs and signs") || title.contains("songs & signs") || title.contains("songs ") ||
+                title.contains("signs/songs") || title.contains("[forced]") || title.contains("(forced)"));
+    }
+
+    public String getLanguage() {
+        return this.language;
+    }
+
+    public String getTitle() {
+        return this.title;
+    }
+
+    public boolean getIsImageSubtitle() {
+        return this.isImageSubtitle;
+    }
+
+    public boolean getIsFullSubtitle() {
+        return this.isFullSubtitle;
+    }
+}

src/ffmpegconverter/streams/VideoStream.java

@@ -0,0 +1,13 @@
+package ffmpegconverter.streams;
+
+/**
+ * An object representation of a video stream in a media file
+ */
+public class VideoStream extends StreamObject {
+    public VideoStream(String codec, int absoluteIndex, int relativeIndex) {
+        this.codecType = "video";
+        this.codecName = codec;
+        this.absoluteIndex = absoluteIndex;
+        this.relativeIndex = relativeIndex;
+    }
+}