colr | Fast and simple color conversion

I am a newbie to PySpark and was wondering if you can guide me on how can I convert following SAS code to PySpark.

SAS Code:

I need some help to understand the avcC atom structure of a particular mp4 sample I am trying to analyze.

Hex dump:

00 00 00 38 61 76 63 43 01 64 00 1F FF E1 00 1C 67 64 00 1F AC D9 80 50 05 BB 01 6A 02 02 02 80 00 00 03 00 80 00 00 1E 07 8C 18 CD 01 00 05 68 E9 7B 2C 8B FD F8 F8 00 00 00 00 13 63 6F 6C 72

This is what I understand from the above:

00 00 00 38 Size of avcC atom

61 76 63 43 avcC signature

01 configurationVersion

64 AVCProfileIndication

00 profile_compatibility

1F AVCLevelIndication

FF 111111b + lengthSizeMinusOne

E1 111b + numOfSequenceParameterSets (in this case, 1 SPS)

00 1C SPS length (in this case, 28 bytes)

67 64 00 1F AC D9 80 50 05 BB 01 6A 02 02 02 80 00 00 03 00 80 00 00 1E 07 8C 18 CD SPS data (28 bytes as per above)

01 numOfPictureParameterSets (in this case, 1 PPS)

00 05 PPS length

This is where the problem begins. Based on the PPS length given by the previous bytes, the next 5 bytes should be the PPS data: 68 E9 7B 2C 8B

However according to the avcC header, the total length of the atom is 56 bytes (0x38), which means that the following 4 bytes should be included: FD F8 F8 00

But the problem is that the PPS length is given as 5 bytes (0x05). So what exactly are these final 4 bytes?

Then follows the header of the colr atom:

00 00 00 13 size of colr atom

63 6F 6C 72 colr signature

Which I have checked and is indeed 19 bytes in length (0x13).

The problem is with the avcC atom and with that particular mp4 sample I am analyzing (I've checked other samples too and they didn't have this peculiarity).

You can find the sample here.

EDIT

mp4info tool from the bento4 suite reports the following as the avcC atom's size: 8+48

And mp4dump reports:

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htmlDiv.on("paste", function(e) { e.preventDefault(); var text = (e.originalEvent || e).clipboardData.getData('text/plain'); document.execCommand('formatBlock', false, 'p'); document.execCommand('insertText', false, text); }); htmlDiv.on("input", function(e) { $(".editor-preview").val(htmlDiv.html()); $(".editor-preview").keyup(); }); $('.editor-preview').keyup(function() { var contentAttr = $(this).attr('class'); if (!codeMode) { var value = $(this).val(); $('.' + contentAttr).html(value); } else { $('.' + contentAttr).html(htmlDiv.text()); } }); });</code></pre> <pre class="snippet-code-css lang-css prettyprint-override"><code>.fieldsets { border: 1px solid #ccc; padding: 1em; } #editControls { overflow: auto; border-top: 1px solid transparent; border-left: 1px solid transparent; border-right: 1px solid transparent; border-color: silver; border-top-left-radius: 5px; border-top-right-radius: 5px; padding: .5em 1em .5em 1em; background-color: #fbfbfb; width: 100%; /* max-width: 950px; */ } #editor { resize: vertical; overflow: auto; border: 1px solid silver; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; min-height: 100px; padding: 1em; background-color: white; width: 100%; color: #333; /* max-width: 950px; */ } #preview { padding: 1em; margin: 0 auto; width: 97%; border-top: 1px dotted #c8ccd0; border-bottom: 1px dotted #c8ccd0; clear: both; } .btn-group>.btn-editor:first-child { margin-left: 0; -webkit-border-top-left-radius: 4px; -moz-border-radius-topleft: 4px; border-top-left-radius: 4px; -webkit-border-bottom-left-radius: 4px; -moz-border-radius-bottomleft: 4px; border-bottom-left-radius: 4px; } .btn-group a { text-decoration: none; } .btn-not-space { position: relative; float: left; margin-left: 0 !important; border-radius: inherit; border: 1px solid transparent; border-color: #ccc; } .btn-editor { height: 30px; display: inline-block; padding: 6px 12px; margin-bottom: 0; font-size: 11px; font-weight: normal; line-height: 1.42857143; text-align: center; white-space: nowrap; vertical-align: middle; -ms-touch-action: manipulation; touch-action: manipulation; cursor: pointer; -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; background-image: none; border-radius: 4px; border: 1px solid transparent; color: #333; background-color: #fff; border-color: #ccc; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code><script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <fieldset class="fieldsets"> <div class="form-group"> <div class="editor-wrapper"> <div id="editControls"> <div class="btn-group"> <a class="btn-editor btn-not-space" data-role="bold" data-ref="#"> <i class="icon-bold">B</i> </a> <a class="btn-editor btn-not-space" data-role="italic" data-ref="#"> <i class="icon-italic">I</i> </a> <a class="btn-editor btn-not-space" data-role="underline" data-ref="#"> <i class="icon-underline">U</i> </a> </div> <div class="btn-group"> <a class="btn-editor btn-not-space" data-role="code" data-ref="#"> <i class="icon-code-view"><></i> </a> </div> </div> <div id="editor" contenteditable=""></div> <br><br><br> <textarea id="textarea" class="editor-preview" name="detail">




To be clearer I attach an image of the problem, in number 1, I write some text, you can see that in the </code> said text it is attached with a code HTML that text is written from the div editable, now in image 2, I click on the code editor function < > is the problem there, because when I paste some code or text the HTML code becomes HTML entities as can be seen in the </code> of ​​image 3.</p>

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