I have an app that is like Vine or Instagram Video and I am trying to delete the last recorded segment. I am using AVAssetWriter and appending the sample buffer to the asset writer input when recor...

This is an extension to an unanswered question I had before: AVCaptureSession is not recording audio from the mic in Swift I'm very unclear how I can write both video that is being modified in rea...

Me and my team are trying to re-encode a video file to a more "gify" feeling by changing the video frame rate. We are using the following properties for the AVAssetWriterInput: let videoSettings:[...

Our app is using AVFoundation to capture video, display, manipulate, and export the video using its sample buffers. I am trying to understand what the CMSampleBufferGetPresentationTimeStamp(_:) CMT...

I'm using PBJVision to implement tap-to-record video functionality. The library doesn't support orientation yet so I'm in the process of trying to engineer it in. From what I see, there are three w...

I have this code that resizes a video from 1280 x 720 to 640 x 360 But i want a resize with no crop. Is there a way to do a full resize the don't crop ? Here's the code class func resizer(inputU...

I am trying to extract audio track from .mp4 video file and convert to .m4a audio file with this outputSettings using AVAssetWriter class AudioChannelLayout channelLayout; memset(&channelLayou...

I record videos with AVAssetWriter. The user can send the video, then I call finishWriting, or cancel the recording, then I call cancelWriting. How I record: func captureOutput(_ captureOutput: A...

I am trying to combine a single video with a single image. This is not trying to combine many images into a single video such as create movie from [UIImage], Swift How do I export UIImage array ...

Let me see if I understood it correctly. At the present most advanced hardware, iOS allows me to record at the following fps: 30, 60, 120 and 240. But these fps behave differently. If I shoot at ...

I'm developing a video compression functionally; my ideas are below: Getting resolution and bit-rate of video. Check resolution of video. If it larger 640x480, I will compress this video in half...

I am at my wits end here despite the good information here on StackOverflow... I am trying to write an OpenGL renderbuffer to a video on the iPad 2 (using iOS 4.3). This is more exactly what I am ...

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...

Im using this wildly popular library for recording segments of video like Vine: https://github.com/rFlex/SCRecorder It works great and in the demo it adds a watermark to all videos created, but th...

I'm using GPUImage in my application and trying to filter video. Live video filtering is working well. The trouble comes up when I try to read a video into memory from the filesystem and apply filt...

What's the right way to add an image overlay to a video created with AVAssetWriter? It's possible to do so with AVAssetExportSession, but this question is about how to do so with AVAssetWriter so ...

Based on this SO post, the code below rotates, centers, and crops a video captured live by the user. The capture session uses AVCaptureSessionPresetHigh for the preset value, and the preview layer...

I'm trying to record segments of audio and recombine them without producing a gap in audio. The eventual goal is to also have video, but I've found that audio itself creates gaps when combined wit...

I want to record a series of clips that when played together via a video player or ffmpeg -f concat play back seemlessly. In either scenario right now, I'm getting a very noticeable audio hiccup a...

I'm trying to take an AVCaptureSession and encode to mp4. It seems like this should be straightforward, and I'm trying to encode a single 960x540 video stream; I'm not worried about audio for the p...

I'am creating a video from an array of images. The purpose of my work is to create a .mov video with no compression. I have see in developer library that it exist a key "AVVideoCompressionPropertie...

I have been struggling with this problem for over a week. I hope someone sees what I'm doing wrong. I am attempting to use the finishWritingWithCompletionHandler: method since the finishWriting met...

I'm working on a personal iOS project that requires full screen videos (15 seconds in length) to be uploaded to a backend over a 4G connection. While I can take videos just fine, the output size of...

I have an AudioTapProcessor attached to AVPlayerItem. which will call static void tap_ProcessCallback(MTAudioProcessingTapRef tap, CMItemCount numberFrames, MTAudioProcessingTapFlags flags, Audio...

I have a video recording app for the iPhone. I am using AVAssetWriter for writing the recorded video data to a file. I am also interested in embedding custom metadata to the file. For eg: I want to...