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Questions tagged [avassetwriter]

on OS X API, you use an AVAssetWriter object to write media data to a new file of a specified audiovisual container type, such as a QuickTime movie file or an MPEG-4 file, with support for automatic interleaving of media data for multiple concurrent tracks

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iOS / iPhone - AVAssetWriter : How to use endSessionAtSourceTime:

I am using AVAssetWriter to create an MPEG4 file. I start a video session with: [assetWriter startSessionAtSourceTime:kCMTimeZero]; Now the video file is written fine if I finish the session with this: [assetWriter…
Zigglzworth
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Having issue with AVAssetWriterInput parameter sourceFormatHint

I am working with AVAssetWriterInput but sourceFormatHint parameter is giving this warning: Incompatible integer to pointer conversion sending 'int' to parameter of type 'CMFormatDescriptionRef' (aka 'const struct opaqueCMFormatDescription…
S.J
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AVAssetWriter corrupting the video trimmed by AVAssetExportSession

I am trying to trim and then compress a video file. For trimming I am using AVAssetExportSession For compression I am using AVAssetWriter. If I use both codes individually every thing works fine but If I trim and then feed the trim output for…
S.J
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Trouble converting array of images to MP4 file

I have an array of images that converts to an MP4 file. From what I can tell, it doesn't seem the images are being added to the video frame for the video causing it to have a zero frames in the video. How would I fix this error to correctly convert…
Chris C
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how to specify reference frames for H264 encoding in iOS?

I'm trying to improve the video quality of my video recording app, the resulted video always have 1 reference frames (see below), while we do see videos from other apps having this value of 2, I checked apple documents and searched SO, but not able…
user2417394
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Terminated App due to memory pressure While creating Video ios

I am create the video using the Array of images . If I select more than 40 images from gallery it gives the Error:Terminated App Due to memory pressure I am use CVPixelBufferRef to create the Video. I write to create the video for (int i=0;…
Milan patel
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Converting array of images to mp4

I tried to convert an array of images to one mp4 file and it seems to work but when the video player starts to play it only shows a black view. I followed some other posts on here to convert images and this what I got. When I test it, all the…
Chris C
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Capturing the screen and writing it to a file in iOS

I got an application that play a few UIView Animations with sounds (using AVAudioPlayer). Can someone please show how I can capture everything that is going on inside a view and save it as a video file on the device? i wasn't able to find a single…
Chiko
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Scale and crop CMSampleBufferRef

I am using AvFoundation & AVCaptureVideoDataOutputSampleBufferDelegate to record a video. I need to implement Zoom functionality in the video being recorded. I am using the following delegate method. - (void)captureOutput:(AVCaptureOutput…
iOS_DEV
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AVAssetWriter memory error

I have few methods that are supposed to write video in mov file to temp dir, but after ~15 sec. I'm getting errors: Received memory warning. Received memory warning. Received memory warning. Received memory warning. Then app is crashing. I'm stuck…
palusik
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Reading from two files one after other using avassetreader

What I need is to merge two movie files. What I need is to read from the files and write the sample to a different file. How can I read form one file and after its over continue reading the 2nd file. So that I continuously receive sample buffers…
borncrazy
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ios - AVAssetWriter Writes Video but does not record AUDIO

I have been successfull in making viedo (though Blur) but have been Unsuccessful in recording audio Please Help. I am using the following code Pls go through it ans suggest some solution or a working tutorial. I am Appending the Sample Buffer…
iAviatorJose
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Application crashes in AVFoundation framework in iOS 7.0.x ONLY

I am recording video in my app. My app crashes in iOS 7.0.x only. My application is crashing while writing the captured video in file. Below is my code to setup session & toggle camera - (BOOL) setupSessionWithPreview:(UIView *)preview…
iOSAppDev
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AVAssetWriter - render a single image for 10 seconds

Trying this: int frameCount = 30*10; for(int i = 0; i
soleil
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Synchronously call requestMediaDataWhenReadyOnQueue

I am calling this inside performBlock of my UIManagedDocument's managedObjectContext's parentContext. That is, it's on a background thread. Within the block I want to call requestMediaDataWhenReadyOnQueue synchronously. In the past , I could use…
John
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