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test_watermark

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Kieran O'Leary 2015-12-24 17:32:09 +00:00
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@ -586,6 +586,33 @@ path_name_and_extension_to_the_last_file</i></pre></dd>
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<!-- ends Modify speed -->
<!-- Text Watermark -->
<span data-toggle="modal" data-target=".text_watermark"><button type="button" class="btn btn-default" data-toggle="tooltip" data-placement="bottom" title="Create opaque centered text watermark ">Text Watermark</button></span>
<div class="modal fade text_watermark" tabindex="-1" role="dialog" aria-labelledby="myLargeModalLabel">
<div class="modal-dialog modal-lg">
<div class="modal-content">
<div class="well">
<h3>Created centered opaque text watermark</h3>
<p>E.g For creating access copies with your institutions name</p>
<p><code>ffmpeg -i <i>input_file</i> -vf drawtext="fontfile=<i>font_path</i>:fontsize=<i>font_size</i>:text=<i>watermark_text</i>:fontcolor=<i>font_colour</i>:alpha=0.4:x=w/2-tw/2:y=h/2-th/2" <i>output_file</i></code></p>
<dl>
<dt>ffmpeg</dt><dd>starts the command</dd>
<dt>-i <i>input_file</i></dt><dd>path, name and extension of the input file</dd>
<dt>-vf "drawtext=fontfile=<i>font_path</i>:fontsize=<i>font_size</i>:text=<i>watermark_text</i>:fontcolor=<i>font_colour</i>:alpha=0.4:x=w/2-tw/2:y=h/2-th/2"</dt><dd>This calls the drawtext filters with the following options:
<dl>
<dt>In the video filter <code>setpts</code> the numerator <code>input_fps</code> sets the input speed and the denominator <code>output_fps</code> sets the output speed; both values are given in frames per second.</dt>
<dt>In the sound filter <code>atempo</code> the numerator <code>output_fps</code> sets the output speed and the denominator <code>input_fps</code> sets the input speed; both values are given in frames per second.</dt>
</dl>
The different filters in a complex filter can be divided either by comma or semicolon. The quotation marks allow to insert a space between the filters for readability.</dd>
<dt>-map "[v]"</dt><dd>maps the video stream and:</dd>
<dt>-map "[a]"</dt><dd>maps the audio stream together into:</dd>
<dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd>
</dl>
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</div>
</div>
</div>
<!-- ends Text watermark -->
</div> <!-- end "well col-md-6 col-md-offset-2" -->
</div> <!-- row -->