add video exporting

HOWTO.md

@@ -4,19 +4,35 @@ This is a guide to populating the `data` working folder found in this applicatio
 **This project will only repack audio on Reverse 3.07 properly.**
 
 ## Table of Contents (sorted by descending time consumption)
-1. [Song Audio](#song-audio-datamer_bgm)
-2. [Jackets](#jackets-datajackets)
-3. [Metadata](#metadata-datamusicparametertable)
-4. [Charts](#charts-datamusicdata)
+1. [Videos](#videos-datamovies)
+2. [Song Audio](#song-audio-datamer_bgm)
+3. [Jackets](#jackets-datajackets)
+4. [Metadata](#metadata-datamusicparametertable)
+5. [Charts](#charts-datamusicdata)
+
+## Videos (`data/movies`)
+*~4.1 GB*
+
+If you want to export music videos, the process for doing so involves a **lot** of waiting; it's automated but took me ~1 hour to finish and used up all of my CPU bandwidth during that time, though I could do some steps while this ran.
+
+Videos exported using this process may not play properly as mentioned in [this issue](https://github.com/muskit/WacK-Repackager/issues/2).
+
+You will need [FFmpeg](https://www.ffmpeg.org/download.html) installed and on PATH.
+
+1. Set the paths in `convert-videos.bat/sh` as needed:
+    - `video_path` to `app/WindowsNoEditor/Mercury/Content/Movie`
+    - `export_path` to `data/movies`
+2. Run `convert-videos.bat/sh` to convert all .usm videos to .mp4 in your data folder.
+    - This script will take a **very** long time to finish.
 
 ## Song Audio (`data/MER_BGM`)
-*~18.8 GB for WAVs*
+*~18.8 GB WAVs*
 
 Due to the audio indexing data in this project only done for **Reverse 3.07**, this process will only work for files of that version.
 
 You will need the latest version of [Audio Cue Editor (ACE)](https://github.com/LazyBone152/ACE).
 
-For each of the files below located in `<WAC>/app/WindowsNoEditor/Mercury/Content/Sound/Bgm`...
+For each of the files below located in `app/WindowsNoEditor/Mercury/Content/Sound/Bgm`...
 
 - MER_BGM.awb
 - MER_BGM_V3_01.awb
@@ -50,7 +66,7 @@ For each of the files below located in `<WAC>/app/WindowsNoEditor/Mercury/Conten
 For this, you will need [UE Viewer](https://www.gildor.org/en/projects/umodel).
 
 1. Run `umodel_64.exe` and configure its Startup Options.
-    - Set "Path to game files" to `<WAC>/app/WindowsNoEditor/Mercury/Content/UI/Textures/JACKET`.
+    - Set "Path to game files" to `app/WindowsNoEditor/Mercury/Content/UI/Textures/JACKET`.
     - Enable "Override game detection" and set it to "Unreal engine 4.19".
     - Click OK.
 2. In the left panel, right click on "All packages", then click on "Export folder content".
@@ -60,8 +76,8 @@ For this, you will need [UE Viewer](https://www.gildor.org/en/projects/umodel).
 ## Metadata (`data/MusicParameterTable.*`)
 *<1 MB*
 
-In `<WAC>/app/WindowsNoEditor/Mercury/Content/Table/`, simply copy `MusicParameterTable.uasset` and `MusicParameterTable.uexp` into `data`.
+In `app/WindowsNoEditor/Mercury/Content/Table/`, simply copy `MusicParameterTable.uasset` and `MusicParameterTable.uexp` into `data`.
 
 ## Charts (`data/MusicData`)
 *~59.5 MB*
-Simply copy the `MusicData` folder at `<WAC>/app/WindowsNoEditor/Mercury/Content/` into `data`.
+Simply copy the `MusicData` folder at `app/WindowsNoEditor/Mercury/Content/` into `data`.