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I have trouble with merging segments that comes from live recording via AVCaptureSession. During capturing AVAssetWritter is using its delegate to dump segments to disk. I'm using this delegate ...
Marcin Kapusta's user avatar
  • 5,600
2 votes
2 answers
282 views

I am trying to achieve an animated gradient effect that changes values over time based on the current seconds. I am also using AVPlayer and AVMutableVideoComposition along with custom instruction and ...
Zaid's user avatar
  • 497
0 votes
1 answer
122 views

I'm building a subtitle generator. I have a subtitle layer which has all the implementations for the subtitles such as animations, styling, etc. When I'm exporting the video, the video is rotated to ...
Azat's user avatar
  • 590
1 vote
1 answer
103 views

I have an AVURLAsset array. It contains videos that have been taken with the back camera, front camera (not mirrored), images turned into a video. All in portrait orientation. I created a function to ...
Chris's user avatar
  • 306
2 votes
1 answer
208 views

In Swift for iOS, I have an array of AVURLAsset. I pass it through a function to stitch/merge the video assets together into one final video. For each sub-video, my goal is to overlay text centered in ...
Chris's user avatar
  • 306
0 votes
0 answers
50 views

I have a SwiftUI view on top of a video view, which has a standard size, full width, and almost full height (always portrait). The video's ratio varies. The SwiftUI view has a Text that the user can ...
Sotiris Kaniras's user avatar
  • 710
0 votes
1 answer
567 views

I'm playing with SwiftUI and have an intro video playing, but wondering how I can remove the background of a video so it will appear transparent If I replace the AVPlayerItem it does display and plays ...
John Mann's user avatar
  • 193
0 votes
0 answers
80 views

I would like to implement functionality like below. i have used scrollView and based on zoom scale I tried to crop video but didn’t able to get same result. Can any one help me with this? Link for ...
Nirav Ramani's user avatar
  • 1
0 votes
1 answer
545 views

I have a link I can DM for a minimum working example! Recording Videos For recording, the AVCaptureConnection for an AVCaptureSession, I set isVideoMirrored to true when using the front camera and ...
Chris's user avatar
  • 306
0 votes
1 answer
116 views

I'm trying to create a an audio loop in Swift and it works very well 9/10 times. But then suddenly, the 10th time (or so) the insertTimeRange function seems to fail in some way. I can see that the ...
ejanson's user avatar
  • 509
0 votes
0 answers
671 views

I get this error when I record a video on my iPhone and then try to upload the file to my application and create an AVMutableComposition. It does not work both on my iPhone and the simulator. private ...
ItsAlwaysThere's user avatar
  • 109
2 votes
0 answers
438 views

I have an app where users upload videos and then I create clips from the video using AVMutableComposition. I don't fully understand the difference between loadInPlaceFileRepresentation and ...
ItsAlwaysThere's user avatar
  • 109
1 vote
0 answers
444 views

I am creating an IOS video editing tool by AVMutableComposition. If I combine multiple videos in a single video mutabletrack, it works fine. However, when I create mutabletrack per video and ...
robert hook's user avatar
  • 11
1 vote
1 answer
979 views

I have several audio clips that I recorded with an AVAudioRecorder over a video. Using a AVMutableComposition I want to merge the audio assets with the video at the times the audio was recorded. For ...
Lance Samaria's user avatar
  • 19.8k
0 votes
0 answers
775 views

i want to convert MKV (Matroska) to MP4 in swift when i add a file with MKV format my code break in line 8 , what should i do to fix that? this is my code: let composition = AVMutableComposition() ...
Amin Rezaew's user avatar
  • 358
1 vote
1 answer
836 views

I followed the Ray Wenderlich to merge videos. The finished result is 1 merged video where portrait videos are at the top of the screen and landscape videos are at the bottom of the screen. In the ...
Lance Samaria's user avatar
  • 19.8k
1 vote
1 answer
222 views

Attempting to merge multiple videos with AVMutableComposition, the tracks are gathering correctly in the avassettrack. However, they simply overlap and only the second video is displayed. Also the ...
Trevor's user avatar
  • 873
0 votes
1 answer
304 views

i'm trying to add audio file selected with MPMediaPickerController to video with AVMutableVideoComposition, but it gives error and doesn't work. picking audio like this : func mediaPicker(_ ...
Ramesh Sanghar's user avatar
  • 233
1 vote
1 answer
1k views

hello i'm combining two videos with AVMutableVideoComposition() and it works good with landscape videos and portrait videos downloaded from youtube but when try portrait video recorded in iPhone or ...
Ramesh Sanghar's user avatar
  • 233
0 votes
0 answers
280 views

I'm adding an an m4a audio file from the file system, loaded via an AVURLAsset, into an AVMutableComposition. If the loaded asset has a duration of 1s, adding it to the AVMutableComposition results in ...
blkhp19's user avatar
  • 502
3 votes
1 answer
224 views

I am trying to merge multiple clips(videos) into one using AVMutableCompositions, I have successfully done this as well as rotating and translating each instruction, however, there is still one issue ...
Jaime Santos's user avatar
  • 587
1 vote
1 answer
624 views

I'm trying to combine 3 videos into single video where videos are cropped and put side by side in hstack. Here is my current solution which puts only the first video 3 times (repeating) side by side. ...
Matej Ukmar's user avatar
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1 vote
0 answers
430 views

I'm trying to write video exporter which can combine N videos and place them side by side. Below example is with 3 videos. Videos are recorded WebRTC streams of speakers, and each has a bit different ...
Matej Ukmar's user avatar
  • 2,245
0 votes
0 answers
116 views

I am working on a video editor app, where based on some processing, I have an array of samples/time-points to remove from the video clip. For example, timePoints = [0 8.2 15.5 20.6...]. //seconds I ...
user122776's user avatar
  • 1
1 vote
1 answer
1k views

I'm trying to merge a pre-existing video with a newly recorded audio voiceover track. User can set the relative sound volume for the two audio tracks (audio belonging to video, and new audio). This ...
Steve Macdonald's user avatar
  • 1,785
1 vote
1 answer
372 views

I have a video that is placed at the origin of the screen, no rotation, as seen in this picture (ignore the background): No crop rectangle I apply a basic rectangle (no rotation for now) crop with ...
lhatemondays's user avatar
  • 13
0 votes
1 answer
185 views

I am adding 60fps video files to an AVMutableComposition and I am wondering if its possible to play that composition back at half speed. This is where its adding to the video track do { try ...
jodldoe's user avatar
  • 67
4 votes
1 answer
704 views

I am attempting to merge videos with scaleTimeRanges (to make them slo-mo or speed-up); however, it is not working as desired. Only the first video has the timerange effect... not all of them. The ...
NCT 127's user avatar
  • 728
1 vote
0 answers
957 views

I want to add a Image over a video and in order to do so I follow this tutorial: The code I implemented is this: func addViewToVideo(fromVideoAt videoURL: URL, withView: UIView, completion: @escaping (...
StackGU's user avatar
  • 968
0 votes
2 answers
1k views

Extended AVMutableComposition so that it can be exported. However, even a 1-second video does not progress at all when export is performed. I tried to print out the progress, and found that it didn't ...
kusumoto_teruya's user avatar
  • 2,475
3 votes
1 answer
991 views

I am trying to simply increase the speed of my exporting of my merged video. Here is the code: //from my extensive research online and on SO, I have pretty much come down to the preset PassThrough ...
Kev Wats's user avatar
  • 1,336
2 votes
1 answer
1k views

I am attempting to make a new video using an image that will always be size: CGSize(375, 667), but with a video that will be different sizes, and with the contentMode of .`aspectFit'. The problem is ...
NCT 127's user avatar
  • 728
0 votes
0 answers
176 views

Following is a simple two video merging code using AVFoundation's AVMutableComposition. I use two different mutable tracks for two videos and manage their layer opacity according to time: import UIKit ...
Rohan Sanap's user avatar
  • 2,882
0 votes
1 answer
678 views

I am simply trying to stitch together (merge) an array of videos (with correct original orientations), and it works HOWEVER with incorrect orientation of some videos. For example with the current ...
user avatar
1 vote
0 answers
453 views

I am one step away from finishing my first original app so I'm quite desperate for an answer. I have created an AVMutableComposition (not AVMutableVideoComposition) that combines multiple clips. All ...
adriankhan's user avatar
  • 59
2 votes
1 answer
1k views

I have a video I'm overlaying on top of another video, where the overlay video has a transparent background. I'm doing this with AVMutableComposition where I just add the tracks and it works great; ...
kerbelda's user avatar
  • 345
0 votes
1 answer
728 views

Right now I get a url from a AVMixComposition using AVExportSession. HighestQuality looks great but the file size is too big, a 15 sec video is 27 mb. MediumQuality looks horrible but the file size is ...
Lance Samaria's user avatar
  • 19.8k
0 votes
0 answers
426 views

I'm adding three clips to an AVMutableComposition like this... let asset = AVURLAsset(url: url, options: [ AVURLAssetPreferPreciseDurationAndTimingKey : true ]) let track = composition....
Ian Warburton's user avatar
  • 15.8k
0 votes
1 answer
128 views

To add a time range to an AVMutableCompositionTrack you have to specify the start time in the track (at:)... try track?.insertTimeRange(CMTimeRangeMake(start: CMTime.zero, ...
Ian Warburton's user avatar
  • 15.8k
0 votes
2 answers
215 views

I'm trying to concatenate two (multiple) audio files. I found a relevant post and solution at Concatenate Two Audio Files Swift Here's the solution: func mergeAudioFiles(audioFileUrls: NSArray) { ...
deafmutemagic's user avatar
  • 123
2 votes
0 answers
625 views

I am trying to merge two videos so that second video is on top of other video. My second video has transparent background so my desired outcome looks like this : However i cannot see second video in ...
Kaan Baris's user avatar
  • 3,431
0 votes
1 answer
442 views

I am trying to merge two videos together using AVMutableComposition After scaling the video's i am not finding a way to crop the video or get rid of the part of the video that is marked red. I tried ...
sarosh mirza's user avatar
  • 702
3 votes
1 answer
323 views

I've got an AVMutableVideoComposition that I'm exporting with AVAssetExportSession and I'm trying to overlay a custom timestamp that updates every second on top of it. Should I be using AVAssetWriter, ...
RealCasually's user avatar
  • 3,613
1 vote
0 answers
229 views

I use AVMutableVideoComposition(asset:applyingCIFiltersWithHandler:) to apply CIFilter for each frame. Here is my code: let mainTrackAsset = AVAsset(url: url) let mainCompositionWithFilter = ...
Roman Kravtsov's user avatar
  • 23
2 votes
1 answer
450 views

I'm working on a demo of how to add extra silence audio at the end of a given audio file. here my audio file length is 29 sec. & I'm adding 11-sec silence. so, final output audio length will be ...
Ketan Odedra's user avatar
  • 1,283
1 vote
1 answer
612 views

I'm dealing with an app that should be able to mix multiple video and audio clips in a single movie file (.mp4). At the momento the resulting movie has one video track, that is the concatenation of ...
Altair Jones's user avatar
  • 914
1 vote
0 answers
563 views

I have a 30 seconds video clip (1280*720, size around 3MB, *.MP4) and a logo image(4KB, JPG). I've managed to add the watermark and exported video using the following code, but the problem is: The ...
Tieda Wei's user avatar
  • 612
2 votes
0 answers
119 views

I am trying to display an image over top of a video for the first few seconds only. I am adding an image to a CALayer and then attempting to hide it using CABasicAnimation. I have tried a few ...
Victor Altadonna's user avatar
  • 193
4 votes
1 answer
1k views

I'm trying two merge 2 videos with a 2 second overlap. In this overlap I'd like to fade the second video in (or fade the first one out to reveal the second, either one would be great). The first ...
kerbelda's user avatar
  • 345
4 votes
1 answer
287 views

I have an array of [AVAsset](). Whenever I record different videos at different durations the below code merges all the durations into 1 video but it will only play the last video in a loop. For eg. ...
Lance Samaria's user avatar
  • 19.8k

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