702: What Determines Preview Capability?

[therube]

702: What Determines Preview Capability?

For instance, for video, you use WMP rendering engine.
WMP can play .flv (I suppose), but Preview does not display it.
(And likewise for [some] other video formats.)
Some formats, perhaps a codec had been installed, allowing WMP to play a particular format that it otherwise might not have handled ... would Preview "know" that?

Is there a list of extensions that are passed on to Preview or can certain formats just not be previewed that way?

[void]

702: What Determines Preview Capability?

Everything uses the windows API IPreviewHandler.

Is there a list of extensions that are passed on to Preview or can certain formats just not be previewed that way?

There is no list in Everything.
The registry is used to determine which IPreviewHandler to use.

Installing a codec pack should associate flv files with a working IPreviewHandler.

-or-

// It should be possible to change the .flv class to a WMP class:
//
// Navigate to HKEY_CLASSES_ROOT\.mp4
// Copy the (Default) value.
//
// Navigate to HKEY_CLASSES_ROOT\.flv
// Make a backup of this key from File -> Export.
// Change the (Default) value to the copied value from the .mp4 class.
//
// You may need to restart Everything and Windows for this change to take effect.

-This didn't work for me, Everything will try to preview the flv with WMP, however WMP doesn't support flv by default.
You will need to install a suitable flv codec.