Comment 15 for bug 241276

Maybe the encoder is capable of creating transparent images, but you're a) creating a JPEG, which doesn't support transparency and b) passing "transparency=none".

> Well, because increasing the microseconds is not enough, you need a timeout
> of several seconds for large images.

OK, but you're changing kClipboardTimeout to mean "the clipboard timeout, minus five seconds", which is not very intuitive. Either you need two constants, say kClipboardTimeoutSeconds and kClipboardTimeoutMicroseconds, or you need to change kClipboardTimeout to 5000000 microseconds and do some arithmetic to split it up into the tv fields.