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add -report to ffv1 fixity https://github.com/amiaopensource/ffmprovisr/issues/86

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Kieran O'Leary 2016-09-24 13:14:30 +01:00 committed by GitHub
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<div class="modal-content">
<div class="well">
<h3>Check FFV1 Version 3 fixity</h3>
<p><code>ffmpeg -i <i>input_file</i> -f null -</code></p>
<p><code>ffmpeg -report -i <i>input_file</i> -f null -</code></p>
<p>This decodes your video and displays any crc checksum mismatches. These errors will display in your terminal like this: <code>[ffv1 @ 0x1b04660] CRC mismatch 350FBD8A!at 0.272000 seconds</code></p>
<p>Frame crcs are enabled by default in FFV1 Version 3.</p>
<dl>
<dt>ffmpeg</dt><dd>starts the command</dd>
<dt>-report</dt><dd>Dump full command line and console output to a file named <i>ffmpeg-YYYYMMDD-HHMMSS.log</i> in the current directory. It also implies <code>-loglevel verbose</code>.</dd>
<dt>-i <i>input_file</i></dt><dd>path, name and extension of the input file</dd>
<dt>-f null</dt><dd>Video is decoded with the <code>null</code> muxer. This allows video decoding without creating an output file.</dd>
<dt>-</dt><dd>FFmpeg syntax requires a specified output, and <code>-</code> is just a place holder. No file is actually created. </dd>