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开源软件名称(OpenSource Name):igrigorik/videospeed开源软件地址(OpenSource Url):https://github.com/igrigorik/videospeed开源编程语言(OpenSource Language):JavaScript 75.7%开源软件介绍(OpenSource Introduction):The science of accelerated playbackTL;DR: faster playback translates to better engagement and retention. Average adult reads prose text at 250 to 300 words per minute (wpm). By contrast, the average rate of speech for English speakers is ~150 wpm, with slide presentations often closer to 100 wpm. As a result, when given the choice, many viewers speed up video playback to ~1.3~1.5 its recorded rate to compensate for the difference. Many viewers report that accelerated viewing keeps their attention longer: faster delivery keeps the viewer more engaged with the content. In fact, with a little training many end up watching videos at 2x+ the recorded speed. Some studies report that after being exposed to accelerated playback, listeners become uncomfortable if they are forced to return to normal rate of presentation. Faster HTML5 VideoHTML5 video provides a native API to accelerate playback of any video. The problem is, many players either hide, or limit this functionality. For best results playback speed adjustments should be easy and frequent to match the pace and content being covered: we don't read at a fixed speed, and similarly, we need an easy way to accelerate the video, slow it down, and quickly rewind the last point to listen to it a few more times. Install Chrome Extension** Once the extension is installed simply navigate to any page that offers HTML5 video (example), and you'll see a speed indicator in top left corner. Hover over the indicator to reveal the controls to accelerate, slowdown, and quickly rewind or advance the video. Or, even better, simply use your keyboard:
You can customize and reassign the default shortcut keys in the extensions settings page, as well as add additional shortcut keys to match your preferences. For example, you can assign multiple different "preferred speed" shortcuts with different values, which will allow you to quickly toggle between your most commonly used speeds. To add a new shortcut, open extension settings and click "Add New". Some sites may assign other functionality to one of the assigned shortcut keys —
these collisions are inevitable, unfortunately. As a workaround, the extension
listens both for lower and upper case values (i.e. you can use
FAQThe video controls are not showing up? This extension is only compatible with HTML5 video. If you don't see the controls showing up, chances are you are viewing a Flash video. If you want to confirm, try right-clicking on the video and inspect the menu: if it mentions flash, then that's the issue. That said, most sites will fallback to HTML5 if they detect that Flash it not available. You can try manually disabling Flash plugin in Chrome:
The speed controls are not showing up for local videos? To enable playback of local media (e.g. File > Open File), you need to grant additional permissions to the extension.
License(MIT License) - Copyright (c) 2014 Ilya Grigorik |
2023-10-27
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