I am using AVFoundation to record audio with the setting below. After recording successfully, I need to show the waveform of the recorded file to the user. Can anyone help me with this task? Here ...

I have a sample project for resizing videos that works well for most videos. However, AVAssetWriter fails to write the audio from specific videos with the error: Error Domain=AVFoundationErrorDomai...

Scenario: I am writing an iOS app to try decode a videoFile.mp4. I am using AVAssetReaderTrackOutput with AVAssetReader to decode frames from the video file. This works very well. I get each & ...

Problem I am looking to extract sample-accurate ranges of LPCM audio from audio tracks within video files. Currently, I'm looking to achieve this using AVAssetReaderTrackOutput against an AVAssetTr...

I'm working to convert to Swift this code which helps get me get audio data for visualizations. The code I'm working with in Obj C, which works well, is: while (reader.status == AVAssetReaderStat...

We are trying to understand how to control/specify the frame rate for videos that we are encoding with AVAssetReader and AVAssetWriter. Specifically, we are are using AVAssetReader and AVAssetWrite...

After implementing the solution to encoding video (with audio) in this question, Video Encoding using AVAssetWriter - CRASHES, I found that the code works correctly in the iPhone Simulator. Unfortu...

I'm using an AVAssetReaderOutput to read samples from an AVAsset, do some processing on them, and play the result using a RemoteIO AU. The problem is that after calling AudioOutputUnitStop to paus...

I have built some code to process video files on OSX, frame by frame. The following is an extract from the code which builds OK, opens the file, locates the video track (only track) and starts read...

I'm trying to convert an example from Bob McCune's Learning AVFoundation book and having some issues using AVAssetReader and NSInputStream. The graph should be a pure sine wave but the values seem ...

I tried to make video in reverse. While playing asset in AVPlayer i set the rate = -1 to make it work in reverse format. But how to export that video? I looked into docs. read about avassetwrite, s...

We are using AVAssetReader and AVAssetWriter somewhat in the style as noted in Video Encoding using AVAssetWriter - CRASHES basically to read a video what we got from the photo gallery / asset libr...

I need to reproduce a video indefinitely (restarting the video when it ends) in my OpenGL application. To do so I'm trying to utilize AV foundation. I created an AVAssetReader and an AVAssetReader...

I'm making something like streaming the audio from iPod library, send the data via network or bluetooth, and playback using audio queue. Thanks for this question and code. Help me a lot. I have t...

So I am faced with a very weird and strange problem and was wondering if anyone else has come across this issue. I am grabbing the raw data from MPMediaItem from the phones music library and then s...

I am currently working on an application as part of my Bachelor in Computer Science. The application will correlate data from the iPhone hardware (accelerometer, gps) and music that is being played...

I'm trying to take a local m4a or mp3 file and compress/down-sample this file (for the purposes of making a smaller file). Originally, I was using the AVAssetExportSession to export an AVAsset to...

Currently, I'm doing a little test project to see if I can get samples from an AVAssetReader to play back using an AudioQueue on iOS. I've read this: ( Play raw uncompressed sound with AudioQueue,...

I have a function that is supposed to re-encode a video to a manageable bitrate on iphone/ipad. Here it is: *UPDATED WORKING CODE, NOW WITH AUDIO! :) * -(void)resizeVideo:(NSString*)pathy{ NSStr...

I'm trying to play a video (MP4/H.263) on iOS, but getting really fuzzy results. Here's the code to initialize the asset reading: mTextureHandle = [self createTexture:CGSizeMake(400,400)]; NSURL ...

How do you read 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 ...