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Karl Kroening
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<table style="width: 100%" class="indextable genindextable"><tr>
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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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<td style="width: 33%; vertical-align: top;"><ul>
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<li><a href="index.html#ffmpeg.drawbox">drawbox() (in module ffmpeg)</a>
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<li><a href="index.html#ffmpeg.drawbox">drawbox() (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.drawtext">drawtext() (in module ffmpeg)</a>
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</li>
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</li>
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</ul></td>
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</ul></td>
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</tr></table>
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</tr></table>
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@ -141,6 +141,152 @@ video with inverted luma.</li>
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<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#drawbox">drawbox</a></p>
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<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#drawbox">drawbox</a></p>
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</dd></dl>
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</dd></dl>
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<dl class="function">
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<dt id="ffmpeg.drawtext">
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<code class="descclassname">ffmpeg.</code><code class="descname">drawtext</code><span class="sig-paren">(</span><em>stream</em>, <em>text=None</em>, <em>x=0</em>, <em>y=0</em>, <em>escape_text=True</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.drawtext" title="Permalink to this definition">¶</a></dt>
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<dd><p>Draw a text string or text from a specified file on top of a video, using the libfreetype library.</p>
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<p>To enable compilation of this filter, you need to configure FFmpeg with <code class="docutils literal"><span class="pre">--enable-libfreetype</span></code>. To enable default
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font fallback and the font option you need to configure FFmpeg with <code class="docutils literal"><span class="pre">--enable-libfontconfig</span></code>. To enable the
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text_shaping option, you need to configure FFmpeg with <code class="docutils literal"><span class="pre">--enable-libfribidi</span></code>.</p>
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<table class="docutils field-list" frame="void" rules="none">
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<col class="field-name" />
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<col class="field-body" />
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<tbody valign="top">
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<tr class="field-odd field"><th class="field-name">Parameters:</th><td class="field-body"><ul class="first last simple">
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<li><strong>box</strong> – Used to draw a box around text using the background color. The value must be either 1 (enable) or 0
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(disable). The default value of box is 0.</li>
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<li><strong>boxborderw</strong> – Set the width of the border to be drawn around the box using boxcolor. The default value of
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boxborderw is 0.</li>
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<li><strong>boxcolor</strong> – The color to be used for drawing box around text. For the syntax of this option, check the “Color”
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section in the ffmpeg-utils manual. The default value of boxcolor is “white”.</li>
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<li><strong>line_spacing</strong> – Set the line spacing in pixels of the border to be drawn around the box using box. The default
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value of line_spacing is 0.</li>
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<li><strong>borderw</strong> – Set the width of the border to be drawn around the text using bordercolor. The default value of
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borderw is 0.</li>
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<li><strong>bordercolor</strong> – Set the color to be used for drawing border around text. For the syntax of this option, check the
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“Color” section in the ffmpeg-utils manual. The default value of bordercolor is “black”.</li>
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<li><strong>expansion</strong> – Select how the text is expanded. Can be either none, strftime (deprecated) or normal (default). See
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the Text expansion section below for details.</li>
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<li><strong>basetime</strong> – Set a start time for the count. Value is in microseconds. Only applied in the deprecated strftime
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expansion mode. To emulate in normal expansion mode use the pts function, supplying the start time (in
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seconds) as the second argument.</li>
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<li><strong>fix_bounds</strong> – If true, check and fix text coords to avoid clipping.</li>
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<li><strong>fontcolor</strong> – The color to be used for drawing fonts. For the syntax of this option, check the “Color” section in
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the ffmpeg-utils manual. The default value of fontcolor is “black”.</li>
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<li><strong>fontcolor_expr</strong> – String which is expanded the same way as text to obtain dynamic fontcolor value. By default
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this option has empty value and is not processed. When this option is set, it overrides fontcolor option.</li>
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<li><strong>font</strong> – The font family to be used for drawing text. By default Sans.</li>
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<li><strong>fontfile</strong> – The font file to be used for drawing text. The path must be included. This parameter is mandatory if
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the fontconfig support is disabled.</li>
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<li><strong>alpha</strong> – Draw the text applying alpha blending. The value can be a number between 0.0 and 1.0. The expression
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accepts the same variables x, y as well. The default value is 1. Please see fontcolor_expr.</li>
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<li><strong>fontsize</strong> – The font size to be used for drawing text. The default value of fontsize is 16.</li>
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<li><strong>text_shaping</strong> – If set to 1, attempt to shape the text (for example, reverse the order of right-to-left text and
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join Arabic characters) before drawing it. Otherwise, just draw the text exactly as given. By default 1 (if
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supported).</li>
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<li><strong>ft_load_flags</strong> – <p>The flags to be used for loading the fonts. The flags map the corresponding flags supported by
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libfreetype, and are a combination of the following values:</p>
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<ul>
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<li><code class="docutils literal"><span class="pre">default</span></code></li>
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<li><code class="docutils literal"><span class="pre">no_scale</span></code></li>
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<li><code class="docutils literal"><span class="pre">no_hinting</span></code></li>
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<li><code class="docutils literal"><span class="pre">render</span></code></li>
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<li><code class="docutils literal"><span class="pre">no_bitmap</span></code></li>
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<li><code class="docutils literal"><span class="pre">vertical_layout</span></code></li>
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<li><code class="docutils literal"><span class="pre">force_autohint</span></code></li>
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<li><code class="docutils literal"><span class="pre">crop_bitmap</span></code></li>
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<li><code class="docutils literal"><span class="pre">pedantic</span></code></li>
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<li><code class="docutils literal"><span class="pre">ignore_global_advance_width</span></code></li>
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<li><code class="docutils literal"><span class="pre">no_recurse</span></code></li>
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<li><code class="docutils literal"><span class="pre">ignore_transform</span></code></li>
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<li><code class="docutils literal"><span class="pre">monochrome</span></code></li>
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<li><code class="docutils literal"><span class="pre">linear_design</span></code></li>
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<li><code class="docutils literal"><span class="pre">no_autohint</span></code></li>
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</ul>
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<p>Default value is “default”. For more information consult the documentation for the FT_LOAD_* libfreetype
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flags.</p>
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</li>
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<li><strong>shadowcolor</strong> – The color to be used for drawing a shadow behind the drawn text. For the syntax of this option,
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check the “Color” section in the ffmpeg-utils manual. The default value of shadowcolor is “black”.</li>
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<li><strong>shadowx</strong> – The x offset for the text shadow position with respect to the position of the text. It can be either
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positive or negative values. The default value is “0”.</li>
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<li><strong>shadowy</strong> – The y offset for the text shadow position with respect to the position of the text. It can be either
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positive or negative values. The default value is “0”.</li>
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<li><strong>start_number</strong> – The starting frame number for the n/frame_num variable. The default value is “0”.</li>
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<li><strong>tabsize</strong> – The size in number of spaces to use for rendering the tab. Default value is 4.</li>
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<li><strong>timecode</strong> – Set the initial timecode representation in “hh:mm:ss[:;.]ff” format. It can be used with or without
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text parameter. timecode_rate option must be specified.</li>
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<li><strong>rate</strong> – Set the timecode frame rate (timecode only).</li>
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<li><strong>timecode_rate</strong> – Alias for <code class="docutils literal"><span class="pre">rate</span></code>.</li>
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<li><strong>r</strong> – Alias for <code class="docutils literal"><span class="pre">rate</span></code>.</li>
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<li><strong>tc24hmax</strong> – If set to 1, the output of the timecode option will wrap around at 24 hours. Default is 0 (disabled).</li>
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<li><strong>text</strong> – The text string to be drawn. The text must be a sequence of UTF-8 encoded characters. This parameter is
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mandatory if no file is specified with the parameter textfile.</li>
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<li><strong>textfile</strong> – A text file containing text to be drawn. The text must be a sequence of UTF-8 encoded characters.
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This parameter is mandatory if no text string is specified with the parameter text. If both text and
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textfile are specified, an error is thrown.</li>
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<li><strong>reload</strong> – If set to 1, the textfile will be reloaded before each frame. Be sure to update it atomically, or it
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may be read partially, or even fail.</li>
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<li><strong>x</strong> – The expression which specifies the offset where text will be drawn within the video frame. It is relative to
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the left border of the output image. The default value is “0”.</li>
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<li><strong>y</strong> – The expression which specifies the offset where text will be drawn within the video frame. It is relative to
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the top border of the output image. The default value is “0”. See below for the list of accepted constants
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and functions.</li>
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</ul>
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</td>
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</tr>
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</tbody>
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</table>
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<dl class="docutils">
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<dt>Expression constants:</dt>
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<dd><dl class="first docutils">
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<dt>The parameters for x and y are expressions containing the following constants and functions:</dt>
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<dd><ul class="first last simple">
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<li>dar: input display aspect ratio, it is the same as <code class="docutils literal"><span class="pre">(w</span> <span class="pre">/</span> <span class="pre">h)</span> <span class="pre">*</span> <span class="pre">sar</span></code></li>
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<li>hsub: horizontal chroma subsample values. For example for the pixel format “yuv422p” hsub is 2 and vsub
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is 1.</li>
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<li>vsub: vertical chroma subsample values. For example for the pixel format “yuv422p” hsub is 2 and vsub
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is 1.</li>
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<li>line_h: the height of each text line</li>
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<li>lh: Alias for <code class="docutils literal"><span class="pre">line_h</span></code>.</li>
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<li>main_h: the input height</li>
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<li>h: Alias for <code class="docutils literal"><span class="pre">main_h</span></code>.</li>
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<li>H: Alias for <code class="docutils literal"><span class="pre">main_h</span></code>.</li>
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<li>main_w: the input width</li>
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<li>w: Alias for <code class="docutils literal"><span class="pre">main_w</span></code>.</li>
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<li>W: Alias for <code class="docutils literal"><span class="pre">main_w</span></code>.</li>
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<li>ascent: the maximum distance from the baseline to the highest/upper grid coordinate used to place a glyph
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outline point, for all the rendered glyphs. It is a positive value, due to the grid’s orientation with the Y
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axis upwards.</li>
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<li>max_glyph_a: Alias for <code class="docutils literal"><span class="pre">ascent</span></code>.</li>
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<li>descent: the maximum distance from the baseline to the lowest grid coordinate used to place a glyph outline
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point, for all the rendered glyphs. This is a negative value, due to the grid’s orientation, with the Y axis
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upwards.</li>
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<li>max_glyph_d: Alias for <code class="docutils literal"><span class="pre">descent</span></code>.</li>
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<li>max_glyph_h: maximum glyph height, that is the maximum height for all the glyphs contained in the rendered
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text, it is equivalent to ascent - descent.</li>
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<li>max_glyph_w: maximum glyph width, that is the maximum width for all the glyphs contained in the rendered
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text.</li>
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<li>n: the number of input frame, starting from 0</li>
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<li>rand(min, max): return a random number included between min and max</li>
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<li>sar: The input sample aspect ratio.</li>
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<li>t: timestamp expressed in seconds, NAN if the input timestamp is unknown</li>
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<li>text_h: the height of the rendered text</li>
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<li>th: Alias for <code class="docutils literal"><span class="pre">text_h</span></code>.</li>
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<li>text_w: the width of the rendered text</li>
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<li>tw: Alias for <code class="docutils literal"><span class="pre">text_w</span></code>.</li>
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<li>x: the x offset coordinates where the text is drawn.</li>
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<li>y: the y offset coordinates where the text is drawn.</li>
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</ul>
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</dd>
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</dl>
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<p class="last">These parameters allow the x and y expressions to refer each other, so you can for example specify
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<code class="docutils literal"><span class="pre">y=x/dar</span></code>.</p>
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</dd>
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</dl>
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<p>Official documentation: <a class="reference external" href="https://ffmpeg.org/ffmpeg-filters.html#drawtext">drawtext</a></p>
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</dd></dl>
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<dl class="function">
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<dl class="function">
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<dt id="ffmpeg.filter_">
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<dt id="ffmpeg.filter_">
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<code class="descclassname">ffmpeg.</code><code class="descname">filter_</code><span class="sig-paren">(</span><em>stream_spec</em>, <em>filter_name</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.filter_" title="Permalink to this definition">¶</a></dt>
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<code class="descclassname">ffmpeg.</code><code class="descname">filter_</code><span class="sig-paren">(</span><em>stream_spec</em>, <em>filter_name</em>, <em>*args</em>, <em>**kwargs</em><span class="sig-paren">)</span><a class="headerlink" href="#ffmpeg.filter_" title="Permalink to this definition">¶</a></dt>
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@ -2,5 +2,5 @@
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# Project: ffmpeg-python
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# Project: ffmpeg-python
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# Version:
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# Version:
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# The remainder of this file is compressed using zlib.
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# The remainder of this file is compressed using zlib.
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@ -1 +1 @@
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