rich1.0phorkiehttps://p.cweiske.de/Christian Weiske86400900900<!-- embedding all files of https://p.cweiske.de/621 --> <link rel="stylesheet" href="https://p.cweiske.de/css/embed.css"/> <div class="phork" id="621"> <div class="phork-file"> <div class="phork-content"> <div class="document"> <p>VLC 3.0 supports 360° videos. How can I mark up a mp4 file so that VLC recognizes it as 360 degree video?</p> <p>It's not possible with exiftool. You have to use the spatial media metadata injector from <a class="reference external" href="https://github.com/google/spatial-media/tree/master/spatialmedia">https://github.com/google/spatial-media/tree/master/spatialmedia</a></p> <p>My findings:</p> <div class="section" id="spherical-video-rfc"> <h1>Spherical Video RFC</h1> <p><a class="reference external" href="https://github.com/google/spatial-media/blob/master/docs/spherical-video-rfc.md">https://github.com/google/spatial-media/blob/master/docs/spherical-video-rfc.md</a></p> <p>Git commit:</p> <ul class="simple"> <li>c3d173385bf0e5ad915328e4b91939c1ae367106</li> <li>demux: mp4: support the 360 spherical video box</li> <li><a class="reference external" href="http://git.videolan.org/?p=vlc.git;a=commitdiff;h=c3d173385bf0e5ad915328e4b91939c1ae367106;hp=08d26ea02f5c6c1e1169fd9f315a00e88241f03e">http://git.videolan.org/?p=vlc.git;a=commitdiff;h=c3d173385bf0e5ad915328e4b91939c1ae367106;hp=08d26ea02f5c6c1e1169fd9f315a00e88241f03e</a></li> </ul> <p>VLC only tries to find the string &quot;GSpherical:Spherical&quot; in the meta data to activate the mode.</p> <p>exiftool:</p> <pre class="literal-block"> $ exiftool -XMP-GSpherical:Spherical=&quot;true&quot; file.mp4 </pre> <p>Unfortunately, exiftool writes this in normal XMP data, but the spec v1 wants it in an atom with uuid <tt class="docutils literal"><span class="pre">ffcc8263-f855-4a93-8814-587a02521fdd</span></tt>. exiftool does not support this.</p> <p>You can check this with AtomicParsley (<tt class="docutils literal">apt install atomicparsley</tt>):</p> <pre class="literal-block"> AtomicParsley file.mp4 -T 1 </pre> <p>This special uuid is missing.</p> <hr class="docutils" /> <p>The following command will make it look as if the correct metadata is in your video file, but it actually will not work with VLC because of the missing uuid:</p> <pre class="literal-block"> $ exiftool -XMP-GSpherical:Spherical=&quot;true&quot; -XMP-GSpherical:Stitched=&quot;true&quot; -XMP-GSpherical:StitchingSoftware=dummy -XMP-GSpherical:ProjectionType=equirectangular file.mp4 </pre> <hr class="docutils" /> <p>Adding <tt class="docutils literal"><span class="pre">XMP-GPano:ProjectionType=equirectangular</span></tt> does also not help:</p> <pre class="literal-block"> $ exiftool -ProjectionType=&quot;equirectangular&quot; file.mp4 </pre> </div> <div class="section" id="spherical-video-v2"> <h1>Spherical Video V2</h1> <p><a class="reference external" href="https://github.com/google/spatial-media/blob/master/docs/spherical-video-v2-rfc.md">https://github.com/google/spatial-media/blob/master/docs/spherical-video-v2-rfc.md</a></p> <p>git commit in vlc:</p> <ul class="simple"> <li>cf8b24f05438d6bc451e0d17bf2bf3d006a5cbe3</li> <li>demux: mp4: support 360° v2 spatial metadata</li> <li><a class="reference external" href="http://git.videolan.org/?p=vlc.git;a=commitdiff;h=cf8b24f05438d6bc451e0d17bf2bf3d006a5cbe3;hp=1afd117faf50e266998ace5f08f06e52b2260958">http://git.videolan.org/?p=vlc.git;a=commitdiff;h=cf8b24f05438d6bc451e0d17bf2bf3d006a5cbe3;hp=1afd117faf50e266998ace5f08f06e52b2260958</a></li> </ul> <p>v2 of the spec wants special mp4 atoms/boxes that exiftool is not able to write :/</p> <ul class="simple"> <li><a class="reference external" href="https://sno.phy.queensu.ca/~phil/exiftool/TagNames/QuickTime.html#sv3d">https://sno.phy.queensu.ca/~phil/exiftool/TagNames/QuickTime.html#sv3d</a></li> <li><a class="reference external" href="https://sno.phy.queensu.ca/~phil/exiftool/TagNames/QuickTime.html#equi">https://sno.phy.queensu.ca/~phil/exiftool/TagNames/QuickTime.html#equi</a></li> </ul> </div> <div class="section" id="also"> <h1>Also</h1> <ul class="simple"> <li><a class="reference external" href="https://trac.videolan.org/vlc/ticket/21752">https://trac.videolan.org/vlc/ticket/21752</a></li> </ul> </div> </div> </div> <div class="phork-meta"> <a href="https://p.cweiske.de/621/rev-raw/ac6dc8000b836d8e92dd52c0ce7c05b084a75299/README.rst" style="float: right">view raw source</a> <a href="https://p.cweiske.de/621#README.rst">README.rst</a> </div> </div> </div>