2014/10/15 下午 10:05:35

iphone Programming Glossary: copynextsamplebuffer

Hardware accelerated h.264 decoding to texture, overlay or similar in iOS

http://stackoverflow.com/questions/10646657/hardware-accelerated-h-264-decoding-to-texture-overlay-or-similar-in-ios

if reader.status AVAssetReaderStatusReading CMSampleBufferRef sampleBufferRef readerVideoTrackOutput copyNextSampleBuffer if sampleBufferRef runOnMainQueueWithoutDeadlocking ^ self processMovieFrame sampleBufferRef CMSampleBufferInvalidate..

Getting the musical data of an iPod-track

http://stackoverflow.com/questions/3905240/getting-the-musical-data-of-an-ipod-track

of the asset and add them to the asset reader with AVAssetReader addOutput . Call AVAssetReader startReading . Call copyNextSampleBuffer for each of your AVAssetReaderTrackOutput objects until you have read all the data. See the documentation to all these classes..

Reading samples via AVAssetReader

http://stackoverflow.com/questions/4049207/reading-samples-via-avassetreader

AVAssetReader and Audio Queue streaming problem

http://stackoverflow.com/questions/4763598/avassetreader-and-audio-queue-streaming-problem

somehow the AssetReader is screwed up at the callback function of audio queue. Specifically it fails when it does the copyNextSampleBuffer ie it returns null when it is not finished yet. I have made sure the pointer exists and such so it will be great if anyone.. CMSampleBufferRef sampBuffer pplayerState assetWrapper getNextSampleBuffer the assetreader getting nextsample with copyNextSampleBuffer if sampBuffer nil NSLog @ No more data to read from NSLog @ aro status after null d pplayerState ar status AudioQueueStop..

Extract iPod Library raw PCM samples and play with sound effects

http://stackoverflow.com/questions/4796643/extract-ipod-library-raw-pcm-samples-and-play-with-sound-effects

addOutput assetReaderOutput assetReader startReading CMSampleBufferRef nextBuffer while nextBuffer assetReaderOutput copyNextSampleBuffer What Do I Do Here assetReader release assetReaderOutput release iphone objective c mp3 ipod pcm share improve this question.. trackOutput AVAssetReaderTrackOutput reader.outputs objectAtIndex 0 CMSampleBufferRef sampleBufferRef trackOutput copyNextSampleBuffer if sampleBufferRef CMBlockBufferRef blockBufferRef CMSampleBufferGetDataBuffer sampleBufferRef size_t length CMBlockBufferGetDataLength..

Help Fix Memory Leak release

http://stackoverflow.com/questions/4914853/help-fix-memory-leak-release

^ NSLog @ top of block while assetWriterInput.readyForMoreMediaData CMSampleBufferRef nextBuffer assetReaderOutput copyNextSampleBuffer if nextBuffer append buffer assetWriterInput appendSampleBuffer nextBuffer NSLog @ appended a buffer d bytes CMSampleBufferGetTotalSampleSize..

Drawing waveform with AVAssetReader

http://stackoverflow.com/questions/5032775/drawing-waveform-with-avassetreader

trackOutput AVAssetReaderTrackOutput reader.outputs objectAtIndex 0 CMSampleBufferRef sampleBufferRef trackOutput copyNextSampleBuffer if sampleBufferRef what I gonna do with this Please help me iphone objective c core audio ipod waveform share improve.. trackOutput AVAssetReaderTrackOutput reader.outputs objectAtIndex 0 CMSampleBufferRef sampleBufferRef trackOutput copyNextSampleBuffer if sampleBufferRef CMBlockBufferRef blockBufferRef CMSampleBufferGetDataBuffer sampleBufferRef size_t length CMBlockBufferGetDataLength.. trackOutput AVAssetReaderTrackOutput reader.outputs objectAtIndex 0 CMSampleBufferRef sampleBufferRef trackOutput copyNextSampleBuffer if sampleBufferRef CMBlockBufferRef blockBufferRef CMSampleBufferGetDataBuffer sampleBufferRef size_t length CMBlockBufferGetDataLength..

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

while audioWriterInput.readyForMoreMediaData NSLog @ Ready CMSampleBufferRef nextBuffer readerOutput copyNextSampleBuffer if nextBuffer NSLog @ NextBuffer audioWriterInput appendSampleBuffer nextBuffer audioWriterInput markAsFinished videoWriter..

Using AVAssetReader to read (stream) from a remote asset

http://stackoverflow.com/questions/6242131/using-avassetreader-to-read-stream-from-a-remote-asset

sometimes able to initialize an AVAssetReader successfully I'll expand on the 'sometimes' as well shortly . HOWEVER copyNextSampleBuffer always returns nil in case of remote MP4's . Since several things UPTO the point of invoking copyNextSampleBuffer work I'm.. copyNextSampleBuffer always returns nil in case of remote MP4's . Since several things UPTO the point of invoking copyNextSampleBuffer work I'm not 100 sure if i copyNextSampleBuffer not working for remote mp4's after all the other steps having been successful.. of remote MP4's . Since several things UPTO the point of invoking copyNextSampleBuffer work I'm not 100 sure if i copyNextSampleBuffer not working for remote mp4's after all the other steps having been successful is intended expected functionality. ii That..

How to copy songs from iPod Library to app and play with AVAudioPlayer?

http://stackoverflow.com/questions/7472141/how-to-copy-songs-from-ipod-library-to-app-and-play-with-avaudioplayer

AVAssetReaderOutput output myOutputs objectAtIndex 0 int totalBuff 0 while TRUE CMSampleBufferRef ref output copyNextSampleBuffer if ref NULL break copy data to file read next one AudioBufferList audioBufferList NSMutableData data NSMutableData alloc..

iOS 5.0 crash when reading data from an AVAssetReaderOutput

http://stackoverflow.com/questions/7812394/ios-5-0-crash-when-reading-data-from-an-avassetreaderoutput

any input AVAssetReaderOutput output myOutputs objectAtIndex 0 int totalBuff 0 while TRUE CMSampleBufferRef ref output copyNextSampleBuffer if ref NULL break copy data to file read next one AudioBufferList audioBufferList NSMutableData data NSMutableData alloc.. output myOutputs objectAtIndex 0 int totalBuff 0 BOOL one TRUE while TRUE CMSampleBufferRef ref output copyNextSampleBuffer NSLog @ @ ref if ref NULL break copy data to file read next one AudioBufferList audioBufferList NSMutableData data NSMutableData..

Video Encoding using AVAssetWriter - CRASHES

http://stackoverflow.com/questions/8191840/video-encoding-using-avassetwriter-crashes

CMSampleBufferRef sampleBuffer if reader status AVAssetReaderStatusReading sampleBuffer asset_reader_output copyNextSampleBuffer BOOL result videoWriterInput appendSampleBuffer sampleBuffer CFRelease sampleBuffer if result reader cancelReading .. CMSampleBufferRef nextBuffer if audioReader status AVAssetReaderStatusReading nextBuffer readerOutput copyNextSampleBuffer NSLog @ Ready if nextBuffer NSLog @ NextBuffer audioWriterInput appendSampleBuffer nextBuffer else audioWriterInput.. 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 do that . This means you must release the object. Since you're..