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Add command for getting checksum from stream

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Ashley Blewer 2018-11-09 08:46:56 -05:00
parent 2d14e3266b
commit 14e66c13db
1 changed files with 19 additions and 0 deletions
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index.html
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@ -1861,6 +1861,25 @@
</div>
<!-- ends Create stream md5s -->
<!-- Get checksum for video/audio stream -->
<label class="recipe" for="get_stream_checksum">Get checksum for video/audio stream</label>
<input type="checkbox" id="get_stream_checksum">
<div class="hiding">
<h3>Get checksum for video/audio stream</h3>
<p><code>ffmpeg -loglevel error -i <em>input_file</em> -map 0:v:0 -f hash -hash md5 -</code></p>
<p>This script will perform a fixity check on a specified audio or video stream of the file, useful for checking that the content within a video has not changed even if the container format has changed.</p>
<dl>
<dt>ffmpeg</dt><dd>starts the command</dd>
<dt>-loglevel error</dt><dd>sets the verbosity of logging to show all errors</dd>
<dt>-i <em>input_file</em></dt><dd>path, name and extension of the input file</dd>
<dt>-map 0:v:0</dt><dd>designated the first video stream as the stream on which to perform this hash generation operation. <code>-map 0</code> can be used to run the operation on all streams.</dd>
<dt>-f hash -hash md5</dt><dd>produce a checksum hash, and set the hash algorithm to md5. See the official <a href="https://ffmpeg.org/ffmpeg-formats.html#hash">documentation on hash</a> for other algorithms.</dd>
<dt>-</dt><dd>FFmpeg syntax requires a specified output, and <code>-</code> is just a place holder. No file is actually created.</dd>
</dl>
<p class="link"></p>
</div>
<!-- ends Get checksum for video/audio stream -->
<!-- QCTools Report -->
<label class="recipe" for="qctools">QCTools report (with audio)</label>
<input type="checkbox" id="qctools">