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OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	- (void)drawRect:(NSRect)rect
	{
	// Drawing code here.
	CGContextRef context = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
	CGContextSetTextMatrix(context, CGAffineTransformIdentity);
	NSAttributedString *str = [[NSAttributedString alloc ]
	initWithString:@"学习 Core Text. Learning Core Text. 中华人民共和国。"
	attributes:[NSDictionary dictionaryWithObjectsAndKeys:[NSFont fontWithName:@"Adobe Song Std" size:24.0f], (NSString )kCTFontAttributeName, [NSNumber numberWithBool:YES], (NSString )kCTVerticalFormsAttributeName, nil]];
	CFAttributedStringRef attrString = (CFAttributedStringRef)str;
	CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString(attrString);