From: Louis-Philippe <default@...>
Date: 2010-04-14T22:35:47+09:00
Subject: Re: QTKit glitchy on Snow Leopard Server - Help!

--001636b2b03b82dff90484327438
Content-Type: text/plain; charset=ISO-8859-1

I can't identify your problem in the code,
If that may help you find the bug, I had lot of trouble lately with
timescales...  behaviour is not consistent with the arrival of
Quicktime-X...  I would try to print debug info from my time values while
the program is running, just to be sure they are what I think they are.

2010/4/13 Spencer Rogers <spencerevanrogers@gmail.com>

> I have written a script to pull a frame image from a QuickTime Movie. It
> works great on Snow Leopard, Leopard, and Leopard Server but I get weird
> results on Snow Leopard Server.
>
> When pulling on the 3 working OSs I get the frame at the specified time.
> However when I execute the exact same script with the exact same movie
> on SL Server I get a completely black frame (not sure if its black
> because of an error or because its pulling the first frame - which
> happens to be black). Would you mind taking a look at my code and see if
> I'm doing anything wrong? Has anybody else experienced weird results
> with QTKit on SL Server?
>
>
> require "osx/cocoa"
> include OSX
> OSX.require_framework 'QTKit'
>
> # set the save path
> savePath = "test.png"
>
> # set the time code
> timeCode = 1000
>
> # initailize the movie
> qtmovie = OSX::QTMovie.alloc.initWithFile_error("movie.mov", nil)
>
> # determine the timescale of the movie
> timeScale = qtmovie.attributeForKey('QTMovieTimeScaleAttribute')
>
> # build a QTTime object using the timeCode and the timeScale
> time = OSX::QTMakeTime(timeCode, timeScale)
>
> # pull the frame
> frame = qtmovie.frameImageAtTime_withAttributes_error(time,
> {QTMovieFrameImageType => QTMovieFrameImageTypeNSImage}, nil)
>
> # save the frame
> properties = {NSImageGamma => 1.0, NSImageInterlaced => false}
> bitmapRep =
> OSX::NSBitmapImageRep.alloc.initWithData(frame.TIFFRepresentation)
> blob = bitmapRep.representationUsingType_properties(NSPNGFileType,
> properties)
> blob.writeToFile_atomically(savePath, false)
> --
> Posted via http://www.ruby-forum.com/.
>
>

--001636b2b03b82dff90484327438--