ass_tag_parser

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A Python library for serialization and deserialization of ASS subtitle file format tags markup.

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ass_tag_parser
==============

[![Build](https://github.com/bubblesub/ass_tag_parser/actions/workflows/build.yml/badge.svg)](https://github.com/bubblesub/ass_tag_parser/actions/workflows/build.yml)

A Python library for serialization and deserialization of ASS subtitle file
format tags markup.

Not to confuse with parsing `.ass` files that can be manipulated with
[`ass_parser`](https://github.com/bubblesub/ass_parser).

**Example**:

```python3
from ass_tag_parser import parse_ass

result = parse_ass(
    r"{\an5\pos(175,460)\fnUtopia with Oldstyle figures\fs90\bord0\blur3"
    r"\1c&H131313&\t(0,1000,2,\1c&H131340&)\t(1000,2000,\1c&H1015B2&"
    r"\blur1.4)}Attack No. 1{NOTE:アタックNo.1}"
)
print(result)
print(result[2].meta)
```

**Result**:

```python3 console
[
    AssTagListOpening(),
    AssTagAlignment(alignment=5, legacy=False),
    AssTagPosition(x=175.0, y=460.0),
    AssTagFontName(name="Utopia with Oldstyle figures"),
    AssTagFontSize(size=90.0),
    AssTagBorder(size=0.0),
    AssTagBlurEdgesGauss(weight=3.0),
    AssTagColor(red=19, green=19, blue=19, target=1, short=False),
    AssTagAnimation(
        tags=[AssTagColor(red=64, green=19, blue=19, target=1, short=False)],
        time1=0.0,
        time2=1000.0,
        acceleration=2.0,
    ),
    AssTagAnimation(
        tags=[
            AssTagColor(red=178, green=21, blue=16, target=1, short=False),
            AssTagBlurEdgesGauss(weight=1.4),
        ],
        time1=1000.0,
        time2=2000.0,
        acceleration=None,
    ),
    AssTagListEnding(),
    AssText(text="Attack No. 1"),
    AssTagListOpening(),
    AssTagComment(text="NOTE:アタックNo.1"),
    AssTagListEnding(),
]
Meta(start=5, end=18, text="\\pos(175,460)")
```

Starting from version 2.2, drawing commands are parsed automatically.

---

### Serializing the tree back

ASS tree: `compose_ass`. Note that you don't need to supply `AssTagListOpening`
nor `AssTagListEnding` tags in the input item list – this function inserts them
automatically.

Draw commands: `compose_draw_commands`.

# Contributing

```sh
# Clone the repository:
git clone https://github.com/bubblesub/ass_tag_parser.git
cd ass_tag_parser

# Install to a local venv:
poetry install

# Install pre-commit hooks:
poetry run pre-commit install

# Enter the venv:
poetry shell
```

This project uses [poetry](https://python-poetry.org/) for packaging,
install instructions at [poetry#installation](https://python-poetry.org/docs/#installation)

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