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Re: Musings on QT7 wired bugs
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Re: Musings on QT7 wired bugs




On Jun 12, 2005, at 12:06 PM, Steve Israelson wrote:

This is likely due to Core video.
The movie is probably first initialized with NO drawing area to get
all the track dimensions and stuff, and then they are given areas to
draw.
This probably throws off all the initialization code in the media
handlers.
I know OUR custom Spectrograph media handler had a few issue with
that that we fixed.


On 11-Jun-05, at 6:00 PM, Thomas Fruin wrote:

Initially I thought all kinds of wired stuff was thoroughly messed
up in QuickTime 7, especially in QuickTime Player 7, because my
main LiveStage project was really broken. But after getting over
the initial shock and doing a lot of testing, I am starting to
narrow down the circumstances under which the bugs appear.

I have these wired QuickTime movies which have a skin and load
child movies, so far nothing new. They all basically use the same
LiveStage code, but the content differs.
<http://homepage.mac.com/thomasfruin/fruin/coexistencia/
coexistencia.mov>
<http://www.agrogestion.com/images_agro/videos_streaming/
gestion_oct2004/seminario.mov>
<http://www.agrogestion.com/images_agro/videos_streaming/
temuco_sept2004/seminario.mov>

Once opened in QuickTime Player 7, many things initially seem
broken. (Depression sets in...)
- sometimes no response to mouse clicks in the parent and/or child
movies, when mouseovers are fine
- Movie Info window sometimes shows invalid Current size, like -7 x
-5 instead of 795 x 560, combined with movie itself displayed as
all black
- Movie Info window doesn't always update to show the movie's
information

BUT... here comes the interesting part... Try either one of these
two tricks:
- bring another application to the front, then click back into
QuickTime Player
- or... minimize the movie, then open its window again by clicking
in the dock

Now the movie just works fine! All the bugs are gone! If the movie
window was initially black, it now shows its image. When mouse
clicks were first ignored, now they get a response. Content gets
loaded OK. And if you hide, then reopen the Movie Info window, its
information looks good too.

My conclusion: there must be something broken in the way QuickTime
Player 7 _initially_ opens certain movies (skinned ones?), which
causes all kinds of things to fail. However, after some kind of
internal reset of QuickTime Player 7 (which you can provoke with a
minimize/reopen or deactivate/activate), wired movies actually seem
to behave completely normally.

You guys rock! This is invaluable information for whichever QT engineer gets tasked with addressing this issue. And you get super bonus extra credit brownie points for delivering the information is a calm, unemotional, nonjudgemental fashion. Keep up the good work!



Tim Monroe QuickTime Engineering email@hidden

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