In the following discussion, I will assume that the Program Settings>Path Settings folders are the same folder. I believe this is the optimum way of running MEP. See my discussion on Folder Management for more detailed discussion about how to set up your folders.
Here are the files types created by MEP:
Versions earlier than MEP 17 created this file on import of a video. This file contains a reference to an AVI/MPEG. If you have problems with a movie, delete this file. It will be reconstructed next time you open the movie. It is stored in the folder that contains the imported clip. It contains scene detection information.
The AVD file contains scene detection information for the clip. If the AVD is deleted as mentioned above, right-click on the video object of the clip and choose Scene Detection to rebuild the scene breaks.
MEP creates AVIs when it captures DV (being Standard Definition digital video, not to be confused with HDV High Definition video, which is in MPEG 2 format, or AVCHD).
For MEP 10 and lower: unlike other capture programs, it’s AVIs do not contain audio info. It saves the audio as a separate WAV file. This means that if the audio file is deleted inadvertently, you will not get it back! The AVI and WAV are saved into the same folder, and will be kept together but, if the WAV file is subsequently lost, your AVI and movie will have no audio for that clip. For this reason, I suggest you consider using another capture program such as WinDV. It’s free and easy to use, and the AVI will always have the audio in it so that if the worst comes to the worst and you have to recreate your movie from scratch, at least you will still have all your source material.
MEP’s AVIs may have an “A” appended to their name.
DIP (MEP 14 and Earlier)
This file describes a disk project (that shown on the Burn CD screen). This file contains the information about your DVD menus, backgrounds, as well as the movie, and references one or more MVDs eg in a multi-movie project. If you have set up your DVD menus, I suggest that when you re-open your project, you do so using the File>Load/Save Disk Project… option. This will automatically open the movie ie MVD file as well and you won’t have to “re-open” your DVD project when you go to the CD/DVD screen.
A file describing a sound object such as a WAV (or the audio part of an MEP capture). An HDP file is created every time an audio file is either created by MEP during a capture, or when you drag an audio object into the movie.
Additionally, MEP 11 and higher will create a HDP file for every video file that has an audio component.
HDPs are created in the Import folder.
HDPs will be re-created each time a movie is opened if they have been deleted.
This message pops up during the loading of a movie if MEP cannot load a audio or video file, however, it is misleading. What MEP is trying to say is it cannot find the WAV file or video file that the HDP was created from. This can be caused by various reasons, including deletion of the parent WAV or video, or occasional internal MEP errors.
To fix this, click “Directory”, and browse to display the directory that contains the parent WAV or video file. But do not select the HDP file; select the parent WAV or video file. Then click OK and MEP should then continue loading the movie.
A file containing a visual representation of a sound file. This is stored in the same manner as HDP files. If they are associated with MPEG files and are deleted or moved, they will be reconstructed next time you open your movie.
For MEP11+, this is the file that is created when you click “create wave form”. If it is deleted, you’ll lose the waveform display of your audio soundtrack and have to “create waveform” again. I suggest you do not delete these as creating the waveform can take some time if the video file is large.
These are the movie backup files. MEP makes backups at regular intervals as set in System Settings. MV_ files can only be accessed by the File>Load Backup Movie command. Alternatively, they can be accessed normally if their extension is changed from MV_ to MVD.
This file describes a movie (that shown on the Edit screen). This file includes references to all the files associated with a particular movie (not project!). It contains all the info associated with the movie eg edit points, detected scene points. In MEP 15/VPX and later, you will only "see" MVDs as standalone files if you use the file>Manage Movies>Export Movie File... command:
In MEP 14 and earlier, you can open each MVD at will and edit only that movie. With MEP 15 and later, this is not possible and in my opinion is not desirable, as it is now no longer practically possible to use a MVD in multiple projects and edit it so that all projects will "see" the new version of that MVD.
MVP (MEP 15 and later)
This file describes a MEP project (that shown on the Burn CD screen). This file contains the information about the movie or movies (as described in the MVD section) in your project, together with your DVD menus and backgrounds and other Burn settings. A project can contain multiple movies and these are opened automatically when you open the MVP. An example of a multi-movie project is:
Access to each movie in the project is through either the movie list under the preview monitor or the Window menu:
For all versions
MEP will create a WAV for any other approved type of audio file dragged onto the timeline eg an MP3 or OGG. The original MP3 or OGG will stay in it’s location, and MEP will create a WAV of it in the MEP Program Settings (Y) IMPORT folder.
If a third-party WAV file (ie one that is WAV in it’s original form) is used in a project, an HDP file will be created as above, but in the folder that contains the original WAV, not the MEP IMPORT folder.
WAVs appear on the timeline as HDPs.
For MEP 10 and lower
Non-MEP captured MPEGS/AVIs: MEP will extract the audio from MPEGs and non-MEP captured AVIs then create and save a WAV file of the same filename in the system settings IMPORT folder. If they are deleted, moved or renamed, they will be reconstructed next time you open your movie.
MEP Captured AVIs: during a MEP capture, MEP separates the video into an AVI file and the audio into a separate WAV file. This can be a major problem because if you lose the WAV, or want to use the AVI elsewhere, it won’t have any audio. So beware! Do not delete these audio files. See the AVI section above.
The following files are found in the MEP installation folder:
During the DVD authoring process, MEP will create the necessary folder (VIDEO_TS) and files and then burn them onto the DVD. If you want to use these files yourself eg to burn them manually, MEP places them into a folder called "DVD Image...". This is simply the VIDEO_TS folder with another name.
A good general description of the files on a DVD can be found here.
What Does MEP Do With Your Source Material?
Nothing! MEP does not edit or change your source files eg AVIs, MPEGs, WAVs, MP3s at all. The objects on the timeline are merely reference files to your source material. This means that you shouldn’t relocate to another folder any files you are using in a movie. They CAN be found later, but this is fraught with danger. If you want to be able to transport your projects around, I suggest you use a external hard drive and put ALL your material into the same folder on it, then make your Program Settings folders the same one on that drive. You will also need to make sure your MEP installation is the same so that effects such as titles can be accessed.