2014/10/15 下午 10:04:23
iphone Programming Glossary: avassetwriterHow do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie I want. Thx iphone export uiimage avfoundation share improve this question Take a look at AVAssetWriter and the rest of the AVFoundation framework . The writer has an input of type AVAssetWriterInput which.. look at AVAssetWriter and the rest of the AVFoundation framework . The writer has an input of type AVAssetWriterInput which in turn has a method called appendSampleBuffer that lets you add individual frames to a video.. frames to a video stream. Essentially you 耱l have to 1 Wire the writer NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath somePath fileType AVFileTypeQuickTimeMovie..
Make movie file with picture Array and song file, using AVAsset http://stackoverflow.com/questions/6061092/make-movie-file-with-picture-array-and-song-file-using-avasset @ @ @ documentsDirectoryPath tString error nil NSLog @ Write Started NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath path fileType AVFileTypeMPEG4 .. tString error nil NSLog @ Write Started NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath path fileType AVFileTypeMPEG4 error error NSParameterAssert.. NSData dataWithBytes channelLayout length sizeof AudioChannelLayout AVChannelLayoutKey nil AVAssetWriterInput videoWriterInput AVAssetWriterInput assetWriterInputWithMediaType AVMediaTypeVideo outputSettings..
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 sample application which was only made available at WWDC 2011 . I start by configuring my AVAssetWriter adding an input and configuring a pixel buffer input. The following code is used to set up the pixel.. NSNumber numberWithInt videoSize.height kCVPixelBufferHeightKey nil assetWriterPixelBufferInput AVAssetWriterInputPixelBufferAdaptor assetWriterInputPixelBufferAdaptorWithAssetWriterInput assetWriterVideoInput.. here am I reading anything manually. Also the textures are natively in BGRA format which is what AVAssetWriters are optimized to use when encoding video so there's no need to do any color swizzling here. The raw..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie can help me or send me a code snippet which does something like I want. Thx iphone export uiimage avfoundation share improve this question Take a look at AVAssetWriter and the rest of the AVFoundation framework . The writer has an input of type AVAssetWriterInput which in turn has a method called appendSampleBuffer that lets you.. uiimage avfoundation share improve this question Take a look at AVAssetWriter and the rest of the AVFoundation framework . The writer has an input of type AVAssetWriterInput which in turn has a method called appendSampleBuffer that lets you add individual frames to a video stream. Essentially you 耱l have to 1 Wire the writer NSError.. has a method called appendSampleBuffer that lets you add individual frames to a video stream. Essentially you 耱l have to 1 Wire the writer NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath somePath fileType AVFileTypeQuickTimeMovie error error NSParameterAssert videoWriter NSDictionary..
Make movie file with picture Array and song file, using AVAsset http://stackoverflow.com/questions/6061092/make-movie-file-with-picture-array-and-song-file-using-avasset defaultManager removeItemAtPath NSString stringWithFormat @ @ @ documentsDirectoryPath tString error nil NSLog @ Write Started NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath path fileType AVFileTypeMPEG4 error error NSParameterAssert videoWriter NSDictionary videoSettings.. removeItemAtPath NSString stringWithFormat @ @ @ documentsDirectoryPath tString error nil NSLog @ Write Started NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath path fileType AVFileTypeMPEG4 error error NSParameterAssert videoWriter NSDictionary videoSettings NSDictionary dictionaryWithObjectsAndKeys.. NSNumber numberWithInt 192000 AVEncoderBitRateKey NSData dataWithBytes channelLayout length sizeof AudioChannelLayout AVChannelLayoutKey nil AVAssetWriterInput videoWriterInput AVAssetWriterInput assetWriterInputWithMediaType AVMediaTypeVideo outputSettings videoSettings retain AVAssetWriterInput audioWriterInput..
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 by Dennis Muhlestein's article on the subject and Apple's ChromaKey sample application which was only made available at WWDC 2011 . I start by configuring my AVAssetWriter adding an input and configuring a pixel buffer input. The following code is used to set up the pixel buffer input NSDictionary sourcePixelBufferAttributesDictionary.. numberWithInt videoSize.width kCVPixelBufferWidthKey NSNumber numberWithInt videoSize.height kCVPixelBufferHeightKey nil assetWriterPixelBufferInput AVAssetWriterInputPixelBufferAdaptor assetWriterInputPixelBufferAdaptorWithAssetWriterInput assetWriterVideoInput sourcePixelBufferAttributes sourcePixelBufferAttributesDictionary.. CVPixelBufferRelease pixel_buffer Note that at no point here am I reading anything manually. Also the textures are natively in BGRA format which is what AVAssetWriters are optimized to use when encoding video so there's no need to do any color swizzling here. The raw BGRA pixels are just fed into the encoder to make the movie...
Upload live streaming video from iPhone like Ustream or Qik http://stackoverflow.com/questions/1960782/upload-live-streaming-video-from-iphone-like-ustream-or-qik one by one. The answer is complex... Basically in the didOutputSampleBuffer function above you add the samples into an AVAssetWriter . I actually had three asset writers active at a time past present and future managed on different threads. The past writer..
How do I export UIImage array as a movie? http://stackoverflow.com/questions/3741323/how-do-i-export-uiimage-array-as-a-movie does something like I want. Thx iphone export uiimage avfoundation share improve this question Take a look at AVAssetWriter and the rest of the AVFoundation framework . The writer has an input of type AVAssetWriterInput which in turn has a method.. question Take a look at AVAssetWriter and the rest of the AVFoundation framework . The writer has an input of type AVAssetWriterInput which in turn has a method called appendSampleBuffer that lets you add individual frames to a video stream. Essentially.. that lets you add individual frames to a video stream. Essentially you 耱l have to 1 Wire the writer NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath somePath fileType AVFileTypeQuickTimeMovie error error..
Can use AVCaptureVideoDataOutput and AVCaptureMovieFileOutput at the same time? http://stackoverflow.com/questions/4944083/can-use-avcapturevideodataoutput-and-avcapturemoviefileoutput-at-the-same-time grabbing frames at the same time using AVCaptureSession and AVCaptureVideoDataOutput to route frames into my own code AVAssetWriter AVAssetWriterInput and AVAssetWriterInputPixelBufferAdaptor to write frames out to an H.264 encoded movie file That's without.. at the same time using AVCaptureSession and AVCaptureVideoDataOutput to route frames into my own code AVAssetWriter AVAssetWriterInput and AVAssetWriterInputPixelBufferAdaptor to write frames out to an H.264 encoded movie file That's without investigating.. AVCaptureSession and AVCaptureVideoDataOutput to route frames into my own code AVAssetWriter AVAssetWriterInput and AVAssetWriterInputPixelBufferAdaptor to write frames out to an H.264 encoded movie file That's without investigating audio. I end up getting..
Reading audio samples via AVAssetReader http://stackoverflow.com/questions/4972677/reading-audio-samples-via-avassetreader I've found examples of duplicating or mixing using AVAssetReader but those loops are always controlled by the AVAssetWriter loop. Is it possible just to create an AVAssetReader and read through it getting each sample and throwing the int32 of each..
Uploading live streaming video from iPhone [duplicate] http://stackoverflow.com/questions/5062266/uploading-live-streaming-video-from-iphone one by one. The answer is complex... Basically in the didOutputSampleBuffer function above you add the samples into an AVAssetWriter . I actually had three asset writers active at a time past present and future managed on different threads. The past writer..
AVFoundation + AssetWriter: Generate Movie With Images and Audio http://stackoverflow.com/questions/5640657/avfoundation-assetwriter-generate-movie-with-images-and-audio and add some audio files in .caf format that have to start at pre specified times. Now I have been able to use the AVAssetWriter after going through many questions and answers on this and other sites to export the video portion containing the images.. gotten so far void writeImagesToMovieAtPath NSString path withSize CGSize size NSLog @ Write Started NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath path fileType AVFileTypeQuickTimeMovie error error.. NSString path withSize CGSize size NSLog @ Write Started NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath path fileType AVFileTypeQuickTimeMovie error error NSParameterAssert videoWriter..
iPhone:Programmatically compressing recorded video to share? http://stackoverflow.com/questions/5687341/iphoneprogrammatically-compressing-recorded-video-to-share sharing and to keep the original quality for local storage on the iPhone you should look into AVAssetExportSession or AVAssetWriter . Also read up on how iOS manages Assets . void convertVideoToLowQuailtyWithInputURL NSURL inputURL outputURL NSURL outputURL..
Make movie file with picture Array and song file, using AVAsset http://stackoverflow.com/questions/6061092/make-movie-file-with-picture-array-and-song-file-using-avasset NSString stringWithFormat @ @ @ documentsDirectoryPath tString error nil NSLog @ Write Started NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath path fileType AVFileTypeMPEG4 error error NSParameterAssert.. @ @ @ documentsDirectoryPath tString error nil NSLog @ Write Started NSError error nil AVAssetWriter videoWriter AVAssetWriter alloc initWithURL NSURL fileURLWithPath path fileType AVFileTypeMPEG4 error error NSParameterAssert videoWriter NSDictionary.. AVEncoderBitRateKey NSData dataWithBytes channelLayout length sizeof AudioChannelLayout AVChannelLayoutKey nil AVAssetWriterInput videoWriterInput AVAssetWriterInput assetWriterInputWithMediaType AVMediaTypeVideo outputSettings videoSettings..
iPhone Watermark on recorded Video. http://stackoverflow.com/questions/7205820/iphone-watermark-on-recorded-video the captured frame with the watermark image and finally writing captured and processed frames to a file user AVAssetWriter . Search around stack overflow there are a ton of fantastic examples detailing how to do each of these things I have mentioned... frame to a context draw a PNG of the watermark over it and then add the processed images to your output video using AVAssetWriter . I would suggest adding them in real time so you're not filling up memory with tons of UIImages. How do I export UIImage..
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 and Apple's ChromaKey sample application which was only made available at WWDC 2011 . I start by configuring my AVAssetWriter adding an input and configuring a pixel buffer input. The following code is used to set up the pixel buffer input NSDictionary.. NSNumber numberWithInt videoSize.height kCVPixelBufferHeightKey nil assetWriterPixelBufferInput AVAssetWriterInputPixelBufferAdaptor assetWriterInputPixelBufferAdaptorWithAssetWriterInput assetWriterVideoInput sourcePixelBufferAttributes.. Note that at no point here am I reading anything manually. Also the textures are natively in BGRA format which is what AVAssetWriters are optimized to use when encoding video so there's no need to do any color swizzling here. The raw BGRA pixels are just..
Creating 16:9 Video Rather than 4:3 - AVAsset Writer - iPhone http://stackoverflow.com/questions/10358086/creating-169-video-rather-than-43-avasset-writer-iphone context CVPixelBufferUnlockBaseAddress pxbuffer 0 return pxbuffer iphone objective c video aspect ratio avassetwriter share improve this question So that this can be closed out I'll restate what I did above. The videoSettings dictionary..
Writing video + generated audio to AVAssetWriterInput, audio stuttering http://stackoverflow.com/questions/12187124/writing-video-generated-audio-to-avassetwriterinput-audio-stuttering will reference the memory you passed in originally and things will get messed up. iphone objective c ios avfoundation avassetwriter share improve this question It looks ok although I would use CMBlockBufferCreateWithMemoryBlock because it copies the..
Merging Audio with Video Objective-C http://stackoverflow.com/questions/13909400/merging-audio-with-video-objective-c 0 NSString soundFilePath docsDir stringByAppendingPathComponent @ 1.iaff Any tips Thanks. iphone ios objective c avassetwriter share improve this question First of all I should say the audio format you have given is incorrect NSString soundFilePath..
This code to write video+audio through AVAssetWriter and AVAssetWriterInputs is not working. Why? http://stackoverflow.com/questions/4149963/this-code-to-write-videoaudio-through-avassetwriter-and-avassetwriterinputs-is to audio input I would be very glad if someone could find which is the problem in this code. iphone video audio avassetwriter share improve this question In startVideoRecording I call I assume you are calling this at some point _capSession startRunning..
AVAssetWriter multiple sessions and the status property http://stackoverflow.com/questions/4911534/avassetwriter-multiple-sessions-and-the-status-property the AVAssetWriter again I must be missing something and the docs aren't helping. Thanks. iphone ios avfoundation avassetwriter share improve this question After the writer has completed it is no longer usable. You must create a new one. From the..
AVAssetWritter does not work with audio http://stackoverflow.com/questions/5200077/avassetwritter-does-not-work-with-audio AVCaptureTorchModeOff camera unlockForConfiguration THank you for any help. iphone objective c ios avfoundation avassetwriter share improve this question AVAssetWriter and Audio This may be the same issue as mentioned in the linked post. Try..
AVFoundation + AssetWriter: Generate Movie With Images and Audio http://stackoverflow.com/questions/5640657/avfoundation-assetwriter-generate-movie-with-images-and-audio problem guide me about how to use a AVMutableComposition to use the image array for video export iphone avfoundation avassetwriter avmutablecomposition share improve this question I ended up exporting the video separately using the above code and..
Make movie file with picture Array and song file, using AVAsset http://stackoverflow.com/questions/6061092/make-movie-file-with-picture-array-and-song-file-using-avasset help me by telling me if I forget something or if something is wrong. Thank you very much iphone ios video audio avassetwriter share improve this question I finally found how make movie with a picture array and an audio file. So if you want do..
http://stackoverflow.com/questions/6189535/avassetwriter-woes rgbColorSpace CGContextRelease context CVPixelBufferUnlockBaseAddress pxbuffer 0 return pxbuffer iphone ios avassetwriter share improve this question Well first you need to pass some bufferAttributes when creating that adaptor object NSDictionary..
how to record screen video as like Talking Tomcat application does in iphone? http://stackoverflow.com/questions/6980370/how-to-record-screen-video-as-like-talking-tomcat-application-does-in-iphone the video recording facility but it doesnot slows down while reading each frame any idea.... iphone video opengl es avassetwriter glreadpixels share improve this question In case someone want to implement the same..i figured out myself. First of..
Video Encoding using AVAssetWriter - CRASHES http://stackoverflow.com/questions/8191840/video-encoding-using-avassetwriter-crashes in there somewhere after it is written I would be most greatful to anyone that has any input. iphone objective c ipad avassetwriter avassetreader share improve this question copyNextSampleBuffer is returning a CMSampleBufferRef with 1 retain copy methods..
AVCaptureSession only got video buffer http://stackoverflow.com/questions/9257052/avcapturesession-only-got-video-buffer only got video buffer I am trying to capture the video and audio from iphone camera and output as a video file by avassetwriter but the output video file only contains the first frame with audio. I have inspected AVCaptureSession delegate method void..
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.. green screen images an animated actor against a green background with a backdrop photo and make a video of that using avassetwriter on the iPhone. I have an application that creates a sequence of screenshots of an animated character against a green background... 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 there is. I just added a chroma key filter to my GPUImage framework which..
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