2014/10/15 下午 10:05:23

iphone Programming Glossary: composite

Writing video + generated audio to AVAssetWriterInput, audio stuttering

http://stackoverflow.com/questions/12187124/writing-video-generated-audio-to-avassetwriterinput-audio-stuttering

I could potentially write these to phone storage and then generate an AVComposition but my plan was to avoid this and composite the audio in floating point format buffers obtaining audio from audio clips is in float format . I might be doing some on..

Rotate CGPath without changing its position

http://stackoverflow.com/questions/13738364/rotate-cgpath-without-changing-its-position

Perhaps you want to rotate the path around a particular point instead of around the origin. The trick is to create a composite transform that combines three individual transforms Translate the origin to the rotation point. Rotate. Invert the translation..

composite colors: CALayer and blend mode on iPhone

http://stackoverflow.com/questions/1658751/composite-colors-calayer-and-blend-mode-on-iphone

colors CALayer and blend mode on iPhone I'm trying to use core image on the iphone. I'm able to composite my colors using.. colors CALayer and blend mode on iPhone I'm trying to use core image on the iphone. I'm able to composite my colors using quartz to draw an uiview but I want to separate each component into CALayer UIview consume more resources..

iPhone - is it IMPOSSIBLE to grab the contents of a CALayers composition?

http://stackoverflow.com/questions/2289948/iphone-is-it-impossible-to-grab-the-contents-of-a-calayers-composition

with UIGetScreenImage or use CALayer renderInContext to have a layer draw into a CGContext but forcing the GPU to composite only a subset of layers into a buffer is something that can only be achieved using private APIs and methods. share improve..

Presenting an image cropping interface

http://stackoverflow.com/questions/2679937/presenting-an-image-cropping-interface

scrollview when you resize or move the underlying image the cropping view adjusts appropriately. I mocked up a composite image which will give a sense of the design I'm after along with how I presently have my view hierarchy setup. The approach..

how to detect (iphone sdk) if a video file was recorded in portrait orientation, or landscape

http://stackoverflow.com/questions/4627940/how-to-detect-iphone-sdk-if-a-video-file-was-recorded-in-portrait-orientation

the results make sense and our web developer is now able to rotate a variety of vids so they all match and composite them into one video. AVAssetTrack videoTrack avAsset tracksWithMediaType AVMediaTypeVideo objectAtIndex 0 CGSize size videoTrack..

Creating mask with CGImageMaskCreate is all black (iphone)

http://stackoverflow.com/questions/633051/creating-mask-with-cgimagemaskcreate-is-all-black-iphone

mask with CGImageMaskCreate is all black iphone I'm trying to create an image mask that from a composite of two existing images. First I start with creating the composite which consists of a small image that is the masking image.. I'm trying to create an image mask that from a composite of two existing images. First I start with creating the composite which consists of a small image that is the masking image and a larger image which is the same size as the background UIImage..

FFT on iPhone to ignore background noise and find lower pitches

http://stackoverflow.com/questions/7181630/fft-on-iphone-to-ignore-background-noise-and-find-lower-pitches

include autocorrelation methods AMDF ASDF Cepstrum Cepstral analysis harmonic product spectrum phase vocoder and or composite algorithms such as RAPT Robust Algorithm for Pitch Tracking and YAAPT. An FFT is useful as only a sub part of some of the..

iPhone ImageMagick Library - converting from batch file script to Objective-C using MagickWand API

http://stackoverflow.com/questions/7480812/iphone-imagemagick-library-converting-from-batch-file-script-to-objective-c-us

copy SOURCE source_copy.jpg convert.exe SOURCE modulate 100 0 100 ^ convert.exe source_copy.jpg compose overlay composite ^ convert.exe source_copy.jpg compose dissolve define compose args 37 100 composite ^ convert.exe modulate 100 70 100 level.. source_copy.jpg compose overlay composite ^ convert.exe source_copy.jpg compose dissolve define compose args 37 100 composite ^ convert.exe modulate 100 70 100 level 3.5 100 ^ convert.exe channel red level 0 89 level 9 100 ^ convert.exe channel green.. level 0 93 level 4.7 100 ^ convert.exe brightness contrast 5x3 ^ convert.exe fill.jpg compose multiply gravity center composite ^ convert.exe level 3.5 100 0.91 level 2.7 100 ^ convert.exe channel red level 3.5 100 ^ convert.exe channel green level..

Draw a shadow which is hidden under the semi-transparent view?

http://stackoverflow.com/questions/8552073/draw-a-shadow-which-is-hidden-under-the-semi-transparent-view

share improve this question You probably want to set the rasterized property of the layer to YES which will composite the shadow before other effects such as opacity are applied to the view. Note however that this has a big performance impact...

avassetwriter with greenscreen or chromakey

http://stackoverflow.com/questions/9756554/avassetwriter-with-greenscreen-or-chromakey

with greenscreen or chromakey Is it possible to composite green screen images an animated actor against a green background with a backdrop photo and make a video of that using avassetwriter.. an application that creates a sequence of screenshots of an animated character against a green background. I'd like to composite those with a photograph from their library. Is there some way to composite the two into a video on the iPhone Thanks iphone.. against a green background. I'd like to composite those with a photograph from their library. Is there some way to composite the two into a video on the iPhone Thanks iphone screenshot avassetwriter chromakey share improve this question Yes..