MyTag

About — MyTag is a Programming Language with the purpose of facilitating the creating and editing process of manipulating the meta-data of certain file formats. These formats include: MP4, MP3, and PDF files. Using the MyTag language a user can easily edit metadata about the files, add coverart to music and video files, watermark PDF files, and much more. Also, this language permits the user manipulate whole directories so that for example, edit all the data about an album with just one execution instead of doing it one by one.

Setup

First of all, clone this repository to your computer.

Now, to begin the setup to use this language, it is assumed that you already have Python 3 installed. The external libraries need to be installed using PIP (if you have Python 3 installed, then this is also installed)

You also need to install the PLY parsing tool.

After this is installed, you need to install the external libraries located in the requirements.txt file by running pip install –r requirements.txt

Alternatively, you can install them seperately from the terminal. Navigate to the cloned repository and run the following commands:

  1. pip install pypdf2
  2. pip install pymupdf
  3. pip install ffmpy
  4. pip install send2trash
  5. pip install mutagen

Now that you have all the libraries installed, you can begin to edit MP4, MP3, and PDF files using MyTag!

To start using MyTag, just run python3 myTag.py and you are now writing in the MyTag language! To see what you can do with this languages, read the documentation in the following section of this file.

Features

  1. MP4 Files

    a. set and get tags - manage file about file’s creator, author, genre, etc.

    b. set costume artwork - pass a path to an image and set it as the video’s coverart

    c. add chapters - divide the video into chapters to easily navigate to specific parts

    d. add subtitles - add subtitles in multiple languages

    e. writing multiple files - pass a directory as the path and manipulate multiple audio files at once

  2. MP3 Files

    a. set and get ID3 tags - manage file about file’s creator, author, genre, etc.

    b. set costume artwork - pass a path to an image and set it as the audio’s coverart

    c. writing multiple file - pass a directory as the path and manipulate multiple audio files at once

  3. PDF Files

    a. merge - merge two PDF Files. It can be merged at the end of a file or in the middle.

    b. watermark - add a watermark to each page of the original PDF

    c. create Table of Content - create a ToC to bookmark certain pages and sections to be able to skip to specific pages easily

    d. modify tags - edit author, creator, date, etc.

Documentation

For all files you work with, the first step would be to create a variable for the path of the file you wish to work with.

Example:

vid myvid = /Users/usr/Demo/GameOfThrones

Now, this will change depending on the format of the file so for MP4 is vid myvar = /PATH/, for MP3 is aud myvar = /PATH/, and for PDF is doc myvar = /PATH/

After you make all the changes you wished to do, save them by running save myvar.

  1. MP4 Files

    Commands

    Once you have the variable set, vid myvar = /PATH/, you can use the following commands to edit the file:

    a. SET set myvar<TAG> = VALUE

    where TAG is the metadata tag you wish to edit, and VALUE is the new value it will have. Possible tags include: title, artist, album, track, genre, date, description, comment, grouping

    b. GET get myvar<TAG>

    where TAG is the metadata tag, shown previously, you with to view the value of.

    c. COVER

    To set the cover image, it uses the SET function but with the cover as the TAG, and a PATH name to the image, instead of string.

    set myvar<cover> = /PATH/

    d. ADD add myvar<TAG> = VALUE

    This is used to add either chapter or sub to add either chapters or subtitles to the video.

    Example: add myvar<chapter> = "10" adds 10 chapters to the video

    add myvar<sub> = "PATH/To/SUBS" adds subtitles located in the file specified

    e. CLEAR clear myvar

    This clears the file’s metadata

  2. MP3 Files

    Commands

    Once you have the variable set, aud myvar = /PATH/, you can use the following commands to edit the file:

    a. SET set myvar<TAG> = VALUE

    where TAG is the metadata tag you wish to edit, and VALUE is the new value it will have. Possible tags include: title, artist, album, albumartist, composer, genre, date, tracknumber, discnumber, bpm

    b. GET get myvar<TAG>

    where TAG is the metadata tag, shown previously, you with to view the value of.

    c. COVER

    To set the cover image, it uses the SET function but with the cover as the TAG, and a PATH name to the image, instead of string.

    set myvar<cover> = /PATH/

    d. CLEAR clear myvar

    This clears the file’s metadata

  3. PDF Files

    Commands

    Once you have the variable set, doc myvar = /PATH/, you can use the following commands to edit the file:

    a. SET set myvar<TAG> = VALUE

    where TAG is the metadata tag you wish to edit, and VALUE is the new value it will have. Possible tags include: format, title, author,subject,keywords,creator,producer,creationDate,modDate,encryption

    b. GET get myvar<TAG>

    where TAG is the metadata tag, shown previously, you with to view the value of.

    c. WATERMARK

    Watermark uses the SET function but receives a path to the watermark PDF instead of a string, like:

    set myvar<watermark> = /PATH/

    d. TABLE OF CONTENTS

    This uses the SET function too, but receives a string in the following format: 1 string 3, where 1 is the heirarchy of the bookmark (if it’s a main section, or a subsection of the main section would be a 2, and so on), string is the title of the chapter/section, and 3 would be the page to link to.

    EXAMPLE:

     set myvar<toc> = "1 chapter1 2"
 set myvar<toc> = "2 subsection1 4"
 set myvar<toc> = "2 subsection2 5"
 set myvar<toc> = "1 chapter2 7"
 save myvar

    e. CLEAR clear myvar

    This clears the file’s metadata

Example

This is an example to add metadata and coverart for a MP4 video file

vid myvid = /Users/usr/Demo/GameOfThrones             //creates variable with video path name
set myvid<artist> = “George Martin”                   //add artist name metadata
set myvid<genre> = “Fantasy”                          //add genre metadata
set myvid<date> = “2017”                              //add date metadata
set myvid<cover> = /Users/usr/Demo/cover.jpg          //add cover image to video
save myvid                                            //save changes

Video Example

Here is a visual example of the code running.

If the video is not embedded correctly, you can click this link to see it on youtube or go to https://www.youtube.com/watch?v=kcqrEt1Ks7A.

Final Report

The final report can be seen by viewing the github page and opening the file called FinalReport.pdf or by clicking here.

Credit

This project was created by: Josue Castro, Jean Merced, Gabriel Rosario and Ariel Silva.
All students from the University of Puerto Rico at Mayaguez for the Programming Languages course during the Fall 2018 Semester with direction of Dr. Wilson Rivera.