Allows synchronisation of 2 HTML5 video and audio streams even on different tabs. Just click the popup to scan each page and press…

Latest Version

Version
1.68
Update
October 15, 2023
Size
9.95KiB
Developer
Category
Users
149
Rating
4 ★
Manifest Version
3
Web Store Status
Languages Support
English (UK)
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Permissions
Tabs
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HTML5 Syncer Extension

Allows synchronisation of 2 HTML5 video and audio streams even on different tabs. Just click the popup to scan each page and press the \"Sync\" button to generate sync buttons next to the video/audio, then click them (preferably when both are paused at the right times) to synchronise. Press the \"Flush\" button to remove synchronisation.

The streams will pause, play, change playback rate and seek together.

You can check the Developer tools console for information.

N.B. You may have to go to \"chrome://extensions/\" and click the reload icon for this extension if the delay does not show up on the green sync button.

Changes:
15/01/2023 - More efficient code used when finding streams.
05/01/2023 - Faster code used when finding streams.
26/10/2022 - Improved element handling (e.g. searching for tags).
15/06/2021 - Handles streams waiting for data better.
18/05/2021 - Fixed issue where the delay could be written on the wrong button; made the buttons appear below audio tags if there is space at the bottom of the page.
16/05/2021 - Removed global variables from background script; improved message passing to tabs.
04/05/2021 - Added \"return true;\" to the end of the \"onMessage\" functions.
19/04/2021 - Replaced 'chrome.extension.sendMessage/onMessage'
17/03/2021 - Minor code cleanup.
08/03/2021 - Updated manifest to v3.
24/02/2021 - Bugfix for last update.
24/02/2021 - Fixed issue where the sync button would appear closer to the top-centre than the top-left on some videos.
10/02/2021 - Better handling of 'Flush' event.
27/01/2021 - Minor amendments.
26/01/2021 - Now when the bar auto-hides, if you place the cursor where it was, it will reappear if it was clickable. Clicking the sync button whilst green now has no effect. Minor change to colour scheme, plus other fixes.
10/01/2021 - Fixed colour scheme of 'Scan' and 'Flush' buttons in popup (especially in dark mode).
13/12/2020 - Fixed issue that caused pause/play loop when seeking. Now can press 'Scan' more than once to generate sync buttons.
23/09/2020 - Keeps up to date with the tabs containing the synced videos.
Delay now displays immediately after syncing.
Event listeners now removed after the 'flush' action.
'src' is now correctly found for synced videos.
HTML button initialisation fixed.
20/09/2020 - Slight amendments to syncing procedure.
06/09/2020 - Improved console logging.
23/05/2020 - Fixed issues causing the wrong media element to be synced to, preventing the sync button being updated properly, and prevents the video automatically playing when the sync button is pressed sometimes.
07/05/2020 - Improved visibility CSS.
05/05/2020 - Adjusted visibility, changed event listeners and delay displayed in sync button.
04/03/2020 - Added close buttons, to remove sync buttons.
05/03/2020 - Placed sync and close buttons in a transparent div.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "name": "HTML5 Syncer", "version": "1.68", "content_scripts": [ { "all_frames": true, "matches": [ "" ], "js": ["content.js"] } ], "background": { "service_worker": "background.js" }, "permissions": ["tabs"], "action": { "default_icon": "ct.png", "default_popup": "index.html", "default_title": "Scan for videos/audio streams" }, "icons": { "128": "ct.png" }}
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How to download and manually install HTML5 Syncer extension for Chrome

Looking for a way to install HTML5 Syncer extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install HTML5 Syncer extensions manually, this article outlines two simple methods to effortlessly install HTML5 Syncer extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download HTML5 Syncer extension and manually install through Drag &Drop

If you ever need to manually install a HTML5 Syncer extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the HTML5 Syncer Extension by clicking the "Download CRX" button on the website.

Look for the HTML5 Syncer extension you wish to install. Go to the website and download the HTML5 Syncer extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for HTML5 Syncer extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the HTML5 Syncer extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download HTML5 Syncer extension for Chrome and install in Developer Mode

This is another method to install HTML5 Syncer extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the HTML5 Syncer extension file

Select and download the HTML5 Syncer extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the HTML5 Syncer extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your HTML5 Syncer extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the HTML5 Syncer extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install HTML5 Syncer extension in 2 ways. We hope this guide proves helpful.

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User reviews

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Alexandte RFST (ID: 00000027a89a3956) Voted 4 ★ - Updated 03/02/2023 Would be awesome if one could re-sync video and audio of this video when the audio is not properly aligned