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#1: update docs · ArchieMeng/ffmpeg-python@8d142c5 · GitHub

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kkroening#1: update docs
1 parent 8abe60f commit 8d142c5

9 files changed

Lines changed: 438 additions & 68 deletions

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‎doc/Makefile‎

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@@ -17,6 +17,7 @@ help:
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# Catch-all target: route all unknown targets to Sphinx using the new
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# "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS).
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%: Makefile
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@rm -rf html doctrees
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@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
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‎doc/html/genindex.html‎

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@@ -51,6 +51,7 @@ <h1 id="index">Index</h1>
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| <a href="#F"><strong>F</strong></a>
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| <a href="#G"><strong>G</strong></a>
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| <a href="#H"><strong>H</strong></a>
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| <a href="#I"><strong>I</strong></a>
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| <a href="#M"><strong>M</strong></a>
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| <a href="#O"><strong>O</strong></a>
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| <a href="#R"><strong>R</strong></a>
@@ -114,6 +115,14 @@ <h2 id="H">H</h2>
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</ul></td>
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</tr></table>
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<h2 id="I">I</h2>
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<table style="width: 100%" class="indextable genindextable"><tr>
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<td style="width: 33%; vertical-align: top;"><ul>
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<li><a href="index.html#ffmpeg.input">input() (in module ffmpeg)</a>
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</li>
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</ul></td>
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</tr></table>
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<h2 id="M">M</h2>
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<table style="width: 100%" class="indextable genindextable"><tr>
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<td style="width: 33%; vertical-align: top;"><ul>
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<h2 id="O">O</h2>
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<table style="width: 100%" class="indextable genindextable"><tr>
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<td style="width: 33%; vertical-align: top;"><ul>
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<li><a href="index.html#ffmpeg.overlay">overlay() (in module ffmpeg)</a>
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<li><a href="index.html#ffmpeg.output">output() (in module ffmpeg)</a>
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</li>
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</ul></td>
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<td style="width: 33%; vertical-align: top;"><ul>
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<li><a href="index.html#ffmpeg.overlay">overlay() (in module ffmpeg)</a>
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</li>
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<li><a href="index.html#ffmpeg.overwrite_output">overwrite_output() (in module ffmpeg)</a>
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</li>
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</ul></td>

‎doc/html/index.html‎

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‎doc/html/objects.inv‎

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‎doc/html/searchindex.js‎

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‎doc/src/conf.py‎

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@@ -30,7 +30,7 @@
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# Add any Sphinx extension module names here, as strings. They can be
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# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
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# ones.
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extensions = ['sphinx.ext.autodoc']
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extensions = ['sphinx.ext.autodoc', 'sphinx.ext.napoleon']
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# Add any paths that contain templates here, relative to this directory.
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templates_path = ['_templates']

‎ffmpeg/_ffmpeg.py‎

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@@ -8,27 +8,53 @@
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def file_input(filename):
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"""Input file URL (ffmpeg ``-i`` option)
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Official documentation: `Main options <https://ffmpeg.org/ffmpeg.html#Main-options>`__
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"""
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return InputNode(file_input.__name__, filename=filename)
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def input(filename):
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"""Shorthand for ``file_input``"""
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return file_input(filename)
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@operator(node_classes={OutputNode, GlobalNode})
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def overwrite_output(parent):
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return GlobalNode(parent, overwrite_output.__name__)
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def overwrite_output(parent_node):
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"""Overwrite output files without asking (ffmpeg ``-y`` option)
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Official documentation: `Main options <https://ffmpeg.org/ffmpeg.html#Main-options>`__
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"""
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return GlobalNode(parent_node, overwrite_output.__name__)
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@operator(node_classes={OutputNode})
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def merge_outputs(*parents):
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return OutputNode(parents, merge_outputs.__name__)
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def merge_outputs(*parent_nodes):
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return OutputNode(parent_nodes, merge_outputs.__name__)
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@operator(node_classes={InputNode, FilterNode})
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def file_output(parent, filename):
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return OutputNode([parent], file_output.__name__, filename=filename)
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def file_output(parent_node, filename):
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"""Output file URL
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Official documentation: `Synopsis <https://ffmpeg.org/ffmpeg.html#Synopsis>`__
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"""
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return OutputNode([parent_node], file_output.__name__, filename=filename)
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@operator(node_classes={InputNode, FilterNode})
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def output(parent_node, filename):
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"""Shorthand for ``file_output``"""
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return file_output(parent_node, filename)
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__all__ = [
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'file_input',
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'file_output',
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'input',
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'merge_outputs',
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'output',
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'overwrite_output',
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]

‎ffmpeg/_filters.py‎

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@@ -5,64 +5,201 @@
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@operator()
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def setpts(parent, expr):
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return FilterNode([parent], setpts.__name__, expr)
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def setpts(parent_node, expr):
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"""Change the PTS (presentation timestamp) of the input frames.
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Args:
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expr: The expression which is evaluated for each frame to construct its timestamp.
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Official documentation: `setpts, asetpts <https://ffmpeg.org/ffmpeg-filters.html#setpts_002c-asetpts>`__
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"""
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return FilterNode([parent_node], setpts.__name__, expr)
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@operator()
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def trim(parent, **kwargs):
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return FilterNode([parent], trim.__name__, **kwargs)
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def trim(parent_node, **kwargs):
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"""Trim the input so that the output contains one continuous subpart of the input.
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Args:
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start: Specify the time of the start of the kept section, i.e. the frame with the timestamp start will be the
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first frame in the output.
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end: Specify the time of the first frame that will be dropped, i.e. the frame immediately preceding the one
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with the timestamp end will be the last frame in the output.
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start_pts: This is the same as start, except this option sets the start timestamp in timebase units instead of
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seconds.
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end_pts: This is the same as end, except this option sets the end timestamp in timebase units instead of
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seconds.
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duration: The maximum duration of the output in seconds.
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start_frame: The number of the first frame that should be passed to the output.
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end_frame: The number of the first frame that should be dropped.
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Official documentation: `trim <https://ffmpeg.org/ffmpeg-filters.html#trim>`__
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"""
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return FilterNode([parent_node], trim.__name__, **kwargs)
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@operator()
18-
def overlay(main_parent, overlay_parent, eof_action='repeat', **kwargs):
42+
def overlay(main_parent_node, overlay_parent_node, eof_action='repeat', **kwargs):
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"""Overlay one video on top of another.
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Args:
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x: Set the expression for the x coordinates of the overlaid video on the main video. Default value is 0. In
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case the expression is invalid, it is set to a huge value (meaning that the overlay will not be displayed
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within the output visible area).
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y: Set the expression for the y coordinates of the overlaid video on the main video. Default value is 0. In
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case the expression is invalid, it is set to a huge value (meaning that the overlay will not be displayed
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within the output visible area).
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eof_action: The action to take when EOF is encountered on the secondary input; it accepts one of the following
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values:
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* ``repeat``: Repeat the last frame (the default).
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* ``endall``: End both streams.
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* ``pass``: Pass the main input through.
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eval: Set when the expressions for x, and y are evaluated.
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It accepts the following values:
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* ``init``: only evaluate expressions once during the filter initialization or when a command is
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processed
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* ``frame``: evaluate expressions for each incoming frame
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Default value is ``frame``.
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shortest: If set to 1, force the output to terminate when the shortest input terminates. Default value is 0.
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format: Set the format for the output video.
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It accepts the following values:
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* ``yuv420``: force YUV420 output
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* ``yuv422``: force YUV422 output
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* ``yuv444``: force YUV444 output
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* ``rgb``: force packed RGB output
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* ``gbrp``: force planar RGB output
76+
77+
Default value is ``yuv420``.
78+
rgb (deprecated): If set to 1, force the filter to accept inputs in the RGB color space. Default value is 0.
79+
This option is deprecated, use format instead.
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repeatlast: If set to 1, force the filter to draw the last overlay frame over the main input until the end of
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the stream. A value of 0 disables this behavior. Default value is 1.
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Official documentation: `overlay <https://ffmpeg.org/ffmpeg-filters.html#overlay-1>`__
84+
"""
1985
kwargs['eof_action'] = eof_action
20-
return FilterNode([main_parent, overlay_parent], overlay.__name__, **kwargs)
86+
return FilterNode([main_parent_node, overlay_parent_node], overlay.__name__, **kwargs)
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@operator()
24-
def hflip(parent):
25-
return FilterNode([parent], hflip.__name__)
90+
def hflip(parent_node):
91+
"""Flip the input video horizontally.
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Official documentation: `hflip <https://ffmpeg.org/ffmpeg-filters.html#hflip>`__
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"""
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return FilterNode([parent_node], hflip.__name__)
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@operator()
29-
def vflip(parent):
30-
return FilterNode([parent], vflip.__name__)
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def vflip(parent_node):
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"""Flip the input video vertically.
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Official documentation: `vflip <https://ffmpeg.org/ffmpeg-filters.html#vflip>`__
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"""
104+
return FilterNode([parent_node], vflip.__name__)
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@operator()
34-
def drawbox(parent, x, y, width, height, color, thickness=None, **kwargs):
108+
def drawbox(parent_node, x, y, width, height, color, thickness=None, **kwargs):
109+
"""Draw a colored box on the input image.
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Args:
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x: The expression which specifies the top left corner x coordinate of the box. It defaults to 0.
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y: The expression which specifies the top left corner y coordinate of the box. It defaults to 0.
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width: Specify the width of the box; if 0 interpreted as the input width. It defaults to 0.
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heigth: Specify the height of the box; if 0 interpreted as the input height. It defaults to 0.
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color: Specify the color of the box to write. For the general syntax of this option, check the "Color" section
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in the ffmpeg-utils manual. If the special value invert is used, the box edge color is the same as the
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video with inverted luma.
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thickness: The expression which sets the thickness of the box edge. Default value is 3.
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w: Alias for ``width``.
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h: Alias for ``height``.
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c: Alias for ``color``.
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t: Alias for ``thickness``.
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Official documentation: `drawbox <https://ffmpeg.org/ffmpeg-filters.html#drawbox>`__
126+
"""
35127
if thickness:
36128
kwargs['t'] = thickness
37-
return FilterNode([parent], drawbox.__name__, x, y, width, height, color, **kwargs)
129+
return FilterNode([parent_node], drawbox.__name__, x, y, width, height, color, **kwargs)
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40132
@operator()
41-
def concat(*parents, **kwargs):
42-
kwargs['n'] = len(parents)
43-
return FilterNode(parents, concat.__name__, **kwargs)
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def concat(*parent_nodes, **kwargs):
134+
"""Concatenate audio and video streams, joining them together one after the other.
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The filter works on segments of synchronized video and audio streams. All segments must have the same number of
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streams of each type, and that will also be the number of streams at output.
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Args:
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unsafe: Activate unsafe mode: do not fail if segments have a different format.
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Related streams do not always have exactly the same duration, for various reasons including codec frame size or
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sloppy authoring. For that reason, related synchronized streams (e.g. a video and its audio track) should be
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concatenated at once. The concat filter will use the duration of the longest stream in each segment (except the
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last one), and if necessary pad shorter audio streams with silence.
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For this filter to work correctly, all segments must start at timestamp 0.
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All corresponding streams must have the same parameters in all segments; the filtering system will automatically
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select a common pixel format for video streams, and a common sample format, sample rate and channel layout for
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audio streams, but other settings, such as resolution, must be converted explicitly by the user.
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Different frame rates are acceptable but will result in variable frame rate at output; be sure to configure the
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output file to handle it.
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Official documentation: `concat <https://ffmpeg.org/ffmpeg-filters.html#concat>`__
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"""
158+
kwargs['n'] = len(parent_nodes)
159+
return FilterNode(parent_nodes, concat.__name__, **kwargs)
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46162
@operator()
47-
def zoompan(parent, **kwargs):
48-
return FilterNode([parent], zoompan.__name__, **kwargs)
163+
def zoompan(parent_node, **kwargs):
164+
"""Apply Zoom & Pan effect.
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Args:
167+
zoom: Set the zoom expression. Default is 1.
168+
x: Set the x expression. Default is 0.
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y: Set the y expression. Default is 0.
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d: Set the duration expression in number of frames. This sets for how many number of frames effect will last
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for single input image.
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s: Set the output image size, default is ``hd720``.
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fps: Set the output frame rate, default is 25.
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z: Alias for ``zoom``.
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Official documentation: `zoompan <https://ffmpeg.org/ffmpeg-filters.html#zoompan>`__
177+
"""
178+
return FilterNode([parent_node], zoompan.__name__, **kwargs)
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51181
@operator()
52-
def hue(parent, **kwargs):
53-
return FilterNode([parent], hue.__name__, **kwargs)
182+
def hue(parent_node, **kwargs):
183+
"""Modify the hue and/or the saturation of the input.
184+
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Args:
186+
h: Specify the hue angle as a number of degrees. It accepts an expression, and defaults to "0".
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s: Specify the saturation in the [-10,10] range. It accepts an expression and defaults to "1".
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H: Specify the hue angle as a number of radians. It accepts an expression, and defaults to "0".
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b: Specify the brightness in the [-10,10] range. It accepts an expression and defaults to "0".
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Official documentation: `hue <https://ffmpeg.org/ffmpeg-filters.html#hue>`__
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"""
193+
return FilterNode([parent_node], hue.__name__, **kwargs)
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56196
@operator()
57-
def colorchannelmixer(parent, *args, **kwargs):
197+
def colorchannelmixer(parent_node, *args, **kwargs):
58198
"""Adjust video input frames by re-mixing color channels.
59199
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`FFmpeg colorchannelmixer filter`_
61-
62-
.. _FFmpeg colorchannelmixer filter:
63-
https://ffmpeg.org/ffmpeg-filters.html#toc-colorchannelmixer
200+
Official documentation: `colorchannelmixer <https://ffmpeg.org/ffmpeg-filters.html#colorchannelmixer>`__
64201
"""
65-
return FilterNode([parent], colorchannelmixer.__name__, **kwargs)
202+
return FilterNode([parent_node], colorchannelmixer.__name__, **kwargs)
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68205
__all__ = [

‎ffmpeg/_run.py‎

Lines changed: 6 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -81,10 +81,11 @@ def _get_output_args(node, stream_name_map):
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@operator(node_classes={OutputNode, GlobalNode})
84-
def get_args(parent):
84+
def get_args(node):
85+
"""Get command-line arguments for ffmpeg."""
8586
args = []
8687
# TODO: group nodes together, e.g. `-i somefile -r somerate`.
87-
sorted_nodes, child_map = _topo_sort(parent)
88+
sorted_nodes, child_map = _topo_sort(node)
8889
input_nodes = [node for node in sorted_nodes if isinstance(node, InputNode)]
8990
output_nodes = [node for node in sorted_nodes if isinstance(node, OutputNode) and not
9091
isinstance(node, GlobalNode)]
@@ -101,8 +102,9 @@ def get_args(parent):
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103104
@operator(node_classes={OutputNode, GlobalNode})
104-
def run(parent, cmd='ffmpeg'):
105-
args = [cmd] + parent.get_args()
105+
def run(node, cmd='ffmpeg'):
106+
"""Run ffmpeg on node graph."""
107+
args = [cmd] + node.get_args()
106108
_subprocess.check_call(args)
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