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2014/10/15 ¤U¤È 10:15:46
iphone Programming Glossary: videosize.widthHow can I add overlay text on a video, then re-encode it? http://stackoverflow.com/questions/10190333/how-can-i-add-overlay-text-on-a-video-then-re-encode-it UIImage imageNamed @ 29.png CALayer aLayer CALayer layer aLayer.contents id myImage.CGImage aLayer.frame CGRectMake videoSize.width 65 videoSize.height 75 57 57 aLayer.opacity 0.65 CALayer parentLayer CALayer layer CALayer videoLayer CALayer layer parentLayer.frame.. 0.65 CALayer parentLayer CALayer layer CALayer videoLayer CALayer layer parentLayer.frame CGRectMake 0 0 videoSize.width videoSize.height videoLayer.frame CGRectMake 0 0 videoSize.width videoSize.height parentLayer addSublayer videoLayer parentLayer.. CALayer layer parentLayer.frame CGRectMake 0 0 videoSize.width videoSize.height videoLayer.frame CGRectMake 0 0 videoSize.width videoSize.height parentLayer addSublayer videoLayer parentLayer addSublayer aLayer CATextLayer titleLayer CATextLayer layer..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 NSNumber numberWithInt kCVPixelFormatType_32BGRA kCVPixelBufferPixelFormatTypeKey NSNumber numberWithInt videoSize.width kCVPixelBufferWidthKey NSNumber numberWithInt videoSize.height kCVPixelBufferHeightKey nil assetWriterPixelBufferInput.. coreVideoTextureCache renderTarget NULL texture attributes GL_TEXTURE_2D GL_RGBA opengl format int videoSize.width int videoSize.height GL_BGRA native iOS format GL_UNSIGNED_BYTE 0 renderTexture glBindTexture CVOpenGLESTextureGetTarget..
Record the drawing as a m4v video file - OpenGL http://stackoverflow.com/questions/9661259/record-the-drawing-as-a-m4v-video-file-opengl where with BGRA I get a solid 30 FPS . I set up the writer using code like the following frameData GLubyte malloc int videoSize.width int videoSize.height 4 NSError error nil assetWriter AVAssetWriter alloc initWithURL movieURL fileType AVFileTypeAppleM4V.. init outputSettings setObject AVVideoCodecH264 forKey AVVideoCodecKey outputSettings setObject NSNumber numberWithInt videoSize.width forKey AVVideoWidthKey outputSettings setObject NSNumber numberWithInt videoSize.height forKey AVVideoHeightKey assetWriterVideoInput.. NSNumber numberWithInt kCVPixelFormatType_32BGRA kCVPixelBufferPixelFormatTypeKey NSNumber numberWithInt videoSize.width kCVPixelBufferWidthKey NSNumber numberWithInt videoSize.height kCVPixelBufferHeightKey nil assetWriterPixelBufferInput..
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