avassetwriter

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 "AVVideoCompressionPropertiesKey" but I don't know how to specify no compression with this key. Could you help me please? Here is my sample code : NSDictionary *videoCleanApertureSettings = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithInt:320], AVVideoCleanApertureWidthKey, [NSNumber numberWithInt:480], AVVideoCleanApertureHeightKey, [NSNumber numberWithInt:10], AVVideoCleanApertureHorizontalOffsetKey,

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 30 or 60 fps, I expect the videos files created from shooting at these fps to play at 30 and 60 fps respectively. But if I shoot at 120 or 240 fps, I expect the video files creating from shooting at these fps to play at 30 fps, or I will not see the slow motion. A few questions: am I right? is there a way to shoot at 120 or 240 fps and play at 120 and 240 fps respectively? I mean play at the fps the

I'm generating a video from a Unity app on iOS. I'm using iVidCap, which uses AVFoundation to do this. That side is all working fine. Essentially the video is rendered by using a texture render target and passing the frames to an Obj-C plugin. Now I need to add audio to the video. The audio is going to be sound effects that occur at specific times and maybe some background sound. The files being used are actually assets internal to the Unity app. I could potentially write these to phone storage and then generate an AVComposition, but my plan was to avoid this and composite the audio in

I'm trying to create a UIView that allows a user to tap a button in i and record the screen (not make a video from the camera), then save it to the document folder. I've seen a couple of SO articles here that talk about AVAssetWriter and make references to this link: http://codethink.no-ip.org/wordpress/archives/673 , but that link appears to be dead. But no one has actually shown a solution or provided any examples on how to accomplish. Anyone have any ideas or can point me in the right direction? This should be simpler than it is. Thanks, Doug The link is not dead. http://codethink.no-ip.org

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:[String:Any] = [ AVVideoCodecKey: AVVideoCodecH264, AVVideoHeightKey: videoTrack.naturalSize.height, AVVideoWidthKey: videoTrack.naturalSize.width, AVVideoCompressionPropertiesKey: [AVVideoExpectedSourceFrameRateKey: NSNumber(value: 12)] ] But the output video keep playing in the normal frame rate (played using AVPlayer ). What is the right way to reduce video frame rate? (12 for example). Any help in

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 attempting: A) set up an AVAssetWriterInputPixelBufferAdaptor create an AVAssetWriter that points to a video file set up an AVAssetWriterInput with appropriate settings set up an AVAssetWriterInputPixelBufferAdaptor to add data to the video file B) write data to a video file using that AVAssetWriterInputPixelBufferAdaptor render OpenGL code to the screen get the OpenGL buffer via glReadPixels create a