Jonathan Harris

@magdesign No, that sort of approach doesn't work in Mavericks and later because QuickLook no longer uses the QuickTime framework. It uses the AVFoundation framework instead, but AVFoundation has no...

@jnai7 No; it's not possible to get notified when the default Movie generator starts playing an MPEG file into the QuickLook preview window, neither is it possible to substitute another...

The ideal solution would be to do the same as whatever the default Movie generator is doing in order to play the video into the Finder's Preview window. But I've...

Turns out that movie previews aren't produced by the QuickLook generator plugin /System/Library/QuickLook/Movie.qlgenerator. (Presumably this is because QuickLook generator plugins can't produce anything other than static text or images). Instead,...

> Interesting. I suppose that the LegacyMovie plugin isn't used in Mavericks(?). If so, is there a way to force Mavericks to use it? It doesn't appear to be used,...

> While webp & gifv shows gibberish & html respectively. webp is a static image format. There's a QuickLook plugin for it [here](https://github.com/dchest/webp-quicklook). gifv "files" are actually [either mp4 or...

> If you rename LegacyMovie.qldisplay to Movie.qldisplay it will work with non-native video containers as on pre-10.9 OS X LegacyMovie.qldisplay does OK on some codec/container combinations if you have Perian...

The instructions [above](https://github.com/Marginal/QLVideo/issues/3#issuecomment-217217855) allow .flv and other "non-native" video types to play in QuickLook on 10.9 and 10.10, and on 10.11 and later if you first disable SIP. > in...

Could do, but I'm not sure why a placeholder image would be better than your media player app's icon. The polite thing for a plugin to do is the current...

Closing. Please use **Help** → **Report an Issue** in the app if you're still seeing this behaviour with [release 2.00](https://github.com/Marginal/QLVideo/releases/latest), as described [here](https://github.com/Marginal/QLVideo/wiki/Troubleshooting#to-report-an-issue).