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https://github.com/streamlink/streamlink
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119 lines
3.1 KiB
ReStructuredText
119 lines
3.1 KiB
ReStructuredText
.. _api_guide:
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API Guide
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=========
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.. module:: streamlink
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This API is what powers the :ref:`cli` but is also available to developers that wish
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to make use of the data Streamlink can retrieve in their own application.
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Extracting streams
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------------------
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The simplest use of the Streamlink API looks like this:
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.. code-block:: python
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>>> import streamlink
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>>> streams = streamlink.streams("http://twitch.tv/day9tv")
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This simply attempts to find a plugin and use it to extract streams from
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the URL. This works great in simple cases but if you want more
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fine tuning you need to use a `session object`_ instead.
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The returned value is a dict containing :class:`Stream <stream.Stream>` objects:
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.. code-block:: python
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>>> streams
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{'best': <HLSStream('http://video11.fra01.hls.twitch.tv/ ...')>,
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'high': <HLSStream('http://video11.fra01.hls.twitch.tv/ ...')>,
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'low': <HLSStream('http://video11.fra01.hls.twitch.tv/ ...')>,
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'medium': <HLSStream('http://video11.fra01.hls.twitch.tv/ ...')>,
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'mobile': <HLSStream('http://video11.fra01.hls.twitch.tv/ ...')>,
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'source': <HLSStream('http://video11.fra01.hls.twitch.tv/ ...')>,
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'worst': <HLSStream('http://video11.fra01.hls.twitch.tv/ ...')>}
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If no plugin for the URL is found, a :exc:`NoPluginError` will be raised.
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If an error occurs while fetching streams, a :exc:`PluginError` will be raised.
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Opening streams to read data
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----------------------------
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Now that you have extracted some streams we might want to read some data from
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one of them. When you call `open()` on a stream, a file-like object will be
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returned, which you can call `.read(size)` and `.close()` on.
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.. code-block:: python
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>>> stream = streams["source"]
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>>> fd = stream.open()
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>>> data = fd.read(1024)
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>>> fd.close()
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If an error occurs while opening a stream, a :exc:`StreamError` will be raised.
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Inspecting streams
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------------------
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It's also possible to inspect streams internal parameters, see
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:ref:`api-stream-subclasses` to see what attributes are available
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for inspection for each stream type.
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For example this is a :class:`HLSStream <stream.HLSStream>` object which
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contains a `url` attribute.
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.. code-block:: python
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>>> stream.url
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'http://video38.ams01.hls.twitch.tv/hls11/ ...'
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Session object
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--------------
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The session allows you to set various options and is more efficient
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when extracting streams more than once. You start by creating a
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:class:`Streamlink` object:
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.. code-block:: python
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>>> from streamlink import Streamlink
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>>> session = Streamlink()
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You can then extract streams like this:
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.. code-block:: python
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>>> streams = session.streams("http://twitch.tv/day9tv")
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or set options like this:
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.. code-block:: python
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>>> session.set_option("rtmp-rtmpdump", "/path/to/rtmpdump")
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See :func:`Streamlink.set_option` to see which options are available.
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Examples
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--------
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Simple player
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^^^^^^^^^^^^^
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This example uses the `PyGObject`_ module to playback a stream using the
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`GStreamer`_ framework.
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.. _PyGObject: https://wiki.gnome.org/action/show/Projects/PyGObject
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.. _GStreamer: http://gstreamer.freedesktop.org/
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.. literalinclude:: ../examples/gst-player.py
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