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Merge pull request #173 from amiaopensource/weaver-branch

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add script for comparing audio framemd5
This commit is contained in:
Reto Kromer
2017-04-16 16:56:05 +02:00
committed by GitHub
parent 57166fe61d ad439d3b78
commit 9477bcfe0a
3 changed files with 91 additions and 13 deletions
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@@ -1172,7 +1172,7 @@ foreach ($file in $inputfiles) {
<dt>-an</dt><dd>ignores the audio stream (audio no)</dd>
<dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd>
</dl>
<p>You may verify an MD5 checksum file created this way by using a <a href="check_framemd5.sh" target="_blank">Bash script</a>.</p>
<p>You may verify an MD5 checksum file created this way by using a <a href="check_video_framemd5.sh" target="_blank">Bash script</a>.</p>
<p class="link"></p>
</div>
</div>
@@ -1187,13 +1187,14 @@ foreach ($file in $inputfiles) {
<div class="modal-content">
<div class="well">
<h3>Create MD5 checksums (audio samples)</h3>
<p><code>ffmpeg -i <i>input_file</i> -filter_complex "asetnsamples=<i>n=48000</i>" -f framemd5 -vn <i>output_file</i></code></p>
<p><code>ffmpeg -i <i>input_file</i> -af "asetnsamples=<i>n=48000</i>" -f framemd5 -vn <i>output_file</i></code></p>
<p>This will create an MD5 checksum for each group of 48000 audio samples.<br> The number of samples per group can be set arbitrarily, but it's good practice to match the samplerate of the media file (so you will get one checksum per second).</p>
<p>Examples for other samplerates:</p>
<ul>
<li>44.1 kHz: "asetnsamples=n=44100"</li>
<li>96 kHz: "asetnsamples=n=96000"</li>
</ul>
<p>Note: This filter trandscodes audio to 16 bit PCM by default. The generated framemd5s will represent this value. Validating these framemd5s will require using the same default settings.</p>
<dl>
<dt>ffmpeg</dt><dd>starts the command</dd>
<dt>-i <i>input_file</i></dt><dd>path, name and extension of the input file</dd>
@@ -1201,7 +1202,7 @@ foreach ($file in $inputfiles) {
<dt>-vn</dt><dd>ignores the video stream (video no)</dd>
<dt><i>output_file</i></dt><dd>path, name and extension of the output file</dd>
</dl>
<p>You may verify an MD5 checksum file created this way by using a <a href="check_framemd5.sh" target="_blank">Bash script</a>.</p>
<p>You may verify an MD5 checksum file created this way by using a <a href="check_audio_framemd5.sh" target="_blank">Bash script</a>.</p>
<p class="link"></p>
</div>
</div>