[visionegg] Re: movies BUG
- From: Mikko Vähäsöyrinki <mikko@xxxxxxxxxxx>
- To: <visionegg@xxxxxxxxxxxxx>
- Date: Fri, 28 Apr 2006 15:25:30 -0700
Awesome - thanks a lot for quick fix. I also got the projections working.
Cheers,
Mikko
-----Original Message-----
From: visionegg-bounce@xxxxxxxxxxxxx [mailto:visionegg-bounce@xxxxxxxxxxxxx]
On Behalf Of Andrew Straw
Sent: Friday, April 28, 2006 2:15 PM
To: visionegg@xxxxxxxxxxxxx
Subject: [visionegg] Re: movies BUG
Hi Mikko,
OK, I fixed the bug and uploaded a new "Bleeding Edge" release to
http://sourceforge.net/project/showfiles.php?group_id=40846&package_id=73479
&release_id=138543
The cause was a silly mistake on my part -- not getting the movie
bounding box correctly. I've fixed the problem and added safeguards to
prevent it happening again. Unfortunately, these safeguards require a
slight change to code that gets the movie bounds. After doing "bounds =
movie.getMovieBox()", get the values by "width=bounds.right-bounds.left"
(rather than the old, error-prone "width=bounds[3]-bounds[1]" ). The new
quicktime.py demo file with these changes is attached.
Mikko Vähäsöyrinki wrote:
>Hi Andrew,
>
>Thanks for the information - it seems to work as you say. I think I'll just
>get a better computer. However, I've encountered a bug that I don't know
how
>to fix. Part of the movie on the right side is clipped off and I couldn't
>figure out why (seems to be something in the low level code). I've tried
for
>example "Why mac for science" movie from this website:
>
>http://www.esm.psu.edu/Faculty/Gray/movies.html
>
>It looks to me like one third of the movie is missing from the right when
>shown with VisionEgg. Also the movie box is not really centered to the
>screen even though it should (it's always at the lower part of the screen
in
>my system).
>
>Cheers,
>Mikko
>
>-----Original Message-----
>From: visionegg-bounce@xxxxxxxxxxxxx
[mailto:visionegg-bounce@xxxxxxxxxxxxx]
>On Behalf Of Andrew Straw
>Sent: Tuesday, April 25, 2006 4:00 PM
>To: visionegg@xxxxxxxxxxxxx
>Subject: [visionegg] Re: movies
>
>Hi Mikko,
>
>The movies are played directly using the QuickTime API. I'm not sure
>what goes on "behind the scenes", but I imagine what's happening is 99%
>the same as what happens when you play something using the QuickTime
>Player. The primary difference is that the movie gets rendered to a
>block of memory, which the Vision Egg code then puts into an OpenGL
>texture.
>
>So, the QuickTime API will try to make the movies play at whatever
>framerate is specified in the QuickTime file. If the Vision Egg draws
>more frames than that, there will simply be multiple identical frames
>drawn. So, if you want to accelerate the playback speed, I think you'd
>need to edit the QuickTime movie file.
>
>You should be able to determine if your system is fast enough using the
>QuickTime player -- I hope the Vision Egg isn't too much less efficient
>that. If you can't play movies there without dropping frames, your
>computer is simply too slow. If you can play them there without dropping
>frames, but frames get dropped in the Vision Egg, we'll have to see if
>we can get some extra speed.
>
>Cheers!
>Andrew
>
>Mikko Vähäsöyrinki wrote:
>
>
>
>>Many thanks for the movie support. I have it working in my system, but I'm
>>not getting high enough frame rates with my current (old) computer (I'm
>>limited to around 100 Hz). I was wondering if anyone has insight into the
>>hardware requirements for getting to the limits of my monitor (160Hz).
>>
>>Another thing I've been wondering is how fast the movies recorded with my
>>standard camcoder are played in VisionEgg. Are they sped up to 160 Hz so
>>that my half an hour movie will only last a fraction of that when
replayed?
>>I'm also a bit worried about how long movies I'll be able to play. I'm not
>>sure how the VisionEgg converts the quicktime movie files into
>>TextureStimulus. Are they read straight into memory, in which case the
>>memory would be the limiting factor? I would like to play up to an hour
>>
>>
>long
>
>
>>movies with 160 Hz in VGA mode. Any thoughts of how this might work and
>>
>>
>what
>
>
>>kind of computer I should buy to get it running?
>>
>>All the help much appreciated.
>>Mikko Vahasoyrinki
>>
>>-----Original Message-----
>>From: visionegg-bounce@xxxxxxxxxxxxx
>>
>>
>[mailto:visionegg-bounce@xxxxxxxxxxxxx]
>
>
>>On Behalf Of Andrew Straw
>>Sent: Monday, April 03, 2006 1:11 AM
>>To: visionegg@xxxxxxxxxxxxx
>>Subject: [visionegg] Re: movies
>>
>>Hi Mikko,
>>
>>I just got QuickTime movies working in Windows. I made a "Bleeding Edge"
>>release for Windows users:
>>https://sourceforge.net/project/showfiles.php?group_id=40846&package_id=73
4
>>
>>
>7
>
>
>>9
>>This is also in the subversion repository.
>>
>>There is now an additional requirement, ctypes. (OK, there's also a
>>requirement to install QuickTime on your system, but you knew that...)
>>
>>The old quicktime.py demo in the demos directory works unmodified on my
>>system.
>>
>>I haven't tried my Mac with the new code and given the extent of the
>>changes, I'm convinced this will break Mac support for QuickTime movies
>>for the time being. However, this new code should be much more
>>maintainable in the long-term.
>>
>>Cheers!
>>Andrew
>>
>>Mikko Vähäsöyrinki wrote:
>>
>>
>>
>>
>>
>>>Hi All,
>>>
>>>I would like to show some movies with the visionegg, but the demos
>>>aren?t working and I?m not sure how to proceed. I?m running vision egg
>>>in windows 2000. Trying to run the mpeg demo gives an error message of
>>>missing module. Based on google it looks like the pygame.movie does
>>>not come with the latest pygame and it?s not necessarily even
>>>compatible with it. I also had a look at the quicktime option, but it
>>>looks like it?s only for the mac at the moment.
>>>
>>>All the help would be greatly appreciated.
>>>
>>>Cheer,
>>>
>>>Mikko
>>>
>>>Dr. Mikko Vähäsöyrinki
>>>
>>>California Institute of Technology
>>>
>>>Division of Biology, MC 139-74
>>>
>>>Pasadena, CA 91125
>>>
>>>Tel. 626-395-2839
>>>
>>>
>>>
>>>
>>>
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>>
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