Improve README.md

1 files changed, 46 insertions, 1 deletions

diff --git a/README.md b/README.md
index a9c5262..1c6e9e5 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,48 @@
 # srtfilter
 
-Parser for the SubRip/SRT format and framework for filters that modify SRT files.
+Parser for SubRip (SRT) subtitle format and framework for utilities that manipulate it.
+
+Install from PyPI: [`srtfilter`](https://pypi.org/project/srtfilter/).
+
+## Usage
+
+### CLI tool
+
+Parse and reproduce an SRT file (output goes to stdout):
+
+`srtfilter input.srt`
+
+Break lines automatically (to handle existing files with poor line breaks):
+
+`srtfilter --filter rebreak_lines input.srt`
+
+More filters can be added in the `src/srtfilter/filters` directory.
+
+### Library
+
+```
+import srtfilter.parse as srtparse
+import sys
+
+with open("input.srt") as f:
+    srt = srtparse.SRT.from_str(f.read())
+
+for event in srt.events:
+    print(event.start, event.end, event.content)
+    event.content = event.content.upper() # for example
+
+# srt.__str__() produces a valid SRT file from the parsed representation
+sys.stdout.write(str(srt))
+```
+
+## License
+
+MIT License; see `LICENSE.txt`.
+
+## Roadmap
+
+- [x] Parse SRT
+- [x] Make CLI tool modular
+- [x] Add filter for breaking lines
+- [ ] Parse timecodes and allow arithmetic with them
+- [ ] More filters? As and when use-cases emerge