Update README.md

README.md

@@ -32,7 +32,7 @@ import ffmpeg
 )
 ```
 
-## [[API reference]](https://kkroening.github.io/ffmpeg-python/)
+## [API reference](https://kkroening.github.io/ffmpeg-python/)
 
 ## Complex filter graphs
 FFmpeg is extremely powerful, but its command-line interface gets really complicated rather quickly - especially when working with signal graphs and doing anything more than trivial.
@@ -51,7 +51,7 @@ ffmpeg -i input.mp4 -i overlay.png -filter_complex "[0]trim=start_frame=10:end_f
 
 Maybe this looks great to you, but if you're not an FFmpeg command-line expert, it probably looks alien.
 
-If you're like me and find Python to be powerful and readable, it's easy with `ffmpeg-python`:
+If you're like me and find Python to be powerful and readable, it's easier with `ffmpeg-python`:
 ```python
 import ffmpeg
 
@@ -70,28 +70,24 @@ overlay_file = ffmpeg.input('overlay.png')
 )
 ```
 
-`ffmpeg-python` takes care of running `ffmpeg` with the command-line arguments that correspond to the above filter diagram, and it's easy to see what's going on and make changes as needed.
+`ffmpeg-python` takes care of running `ffmpeg` with the command-line arguments that correspond to the above filter diagram, in familiar Python terms.
 
 <img src="https://raw.githubusercontent.com/kkroening/ffmpeg-python/master/doc/screenshot.png" alt="Screenshot" align="middle" width="60%" />
 
-Real-world signal graphs can get a heck of a lot more complex, but `ffmpeg-python` handles them with ease.
+Real-world signal graphs can get a heck of a lot more complex, but `ffmpeg-python` handles arbitrarily large (directed-acyclic) signal graphs.
-
 
 ## Installation
 
-The latest version of `ffmpeg-python` can be acquired via pip:
+The latest version of `ffmpeg-python` can be acquired via a typical pip install:
 
 ```
 pip install ffmpeg-python
 ```
 
-It's also possible to clone the source and put it on your python path (`$PYTHONPATH`, `sys.path`, etc.):
+Or clone the source and install locally:
-
 ```bash
-$ git clone git@github.com:kkroening/ffmpeg-python.git
+git clone git@github.com:kkroening/ffmpeg-python.git
-$ export PYTHONPATH=${PYTHONPATH}:ffmpeg-python
+pip install -e ./ffmpeg-python
-$ python
->>> import ffmpeg
 ```
 
 ## [Examples](https://github.com/kkroening/ffmpeg-python/tree/master/examples)
@@ -166,7 +162,7 @@ Some ffmpeg filters drop audio streams, and care must be taken to preserve the a
 
 This dilemma is intrinsic to ffmpeg, and ffmpeg-python tries to stay out of the way while users may refer to the official ffmpeg documentation as to why certain filters drop audio.
 
-As usual, take a look at the [Examples](https://github.com/kkroening/ffmpeg-python/tree/master/examples#audiovideo-pipeline) (the "Audio/video pipeline" example in particular).
+As usual, take a look at the [examples](https://github.com/kkroening/ffmpeg-python/tree/master/examples#audiovideo-pipeline) (*Audio/video pipeline* in particular).
 
 ## Contributing
 
@@ -180,6 +176,18 @@ Pull requests are welcome as well, but it wouldn't hurt to touch base in the iss
 
 Anyone who fixes any of the [open bugs](https://github.com/kkroening/ffmpeg-python/labels/bug) or implements [requested enhancements](https://github.com/kkroening/ffmpeg-python/labels/enhancement) is a hero, but changes should include passing tests.
 
+### Running tests
+
+```bash
+git clone git@github.com:kkroening/ffmpeg-python.git
+cd ffmpeg-python
+virtualenv venv
+. venv/bin/activate  # (OS X / Linux)
+venv\bin\activate    # (Windows)
+pip install -e .[dev]
+pytest
+```
+
 <br />
 
 ### Special thanks