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Questions tagged [avassetwriterinput]

37 questions
9
votes
2 answers

LLSimpleCamera : AVAssetWriterInput appendSampleBuffer crashing

I am using LLSimpleCamera for recording a video. It's recording fine when I use rear camera but when I switch to front camera, app crashes and the error reported is * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason:…
Preetika
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9
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2 answers

Making a real slow motion video that are all slow motion

I am creating this app of mine and shooting videos at 120 and 240 fps. When I watch these videos on my mac I see these markers below the timeline. These markers are editable and represent the area that is in slow motion. So, the video starts at…
Duck
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8
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3 answers

Record video with AVAssetWriter: first frames are black

I am recording video (the user also can switch to audio only) with AVAssetWriter. I start the recording when the app is launched. But the first frames are black (or very dark). This also happens when I switch from audio to video. It feels like the…
Marie Dm
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7
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1 answer

AVAssetWriter convert aac 5.1 audio track from AVAsset fail on appendSampleBuffer

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(&channelLayout, 0,…
Gennadiy Mishin
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7
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0 answers

Proper way to stop a video recording (finishWriting) with AVAssetWriter and without crashing

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: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer:…
Marie Dm
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6
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4 answers

iOS how to correctly handle orientation when capturing video using AVAssetWriter

I am making a sample application that utilizes AVFoundation to record video. The whole point is so I can have more control over how the video is recorded. In my sample project I have the video capturing but am struggling with handling orientation…
miken.mkndev
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5
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1 answer

How to set expected framerate to AVAssetWriterInput

I have an app which encodes videos in different ways and saves it to Photos library - it can cut specific time range, add pictures, text, etc. Everything is working perfectly till I try to encode video 120+ fps. The problem is that video appears to…
Eugene Alexeev
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4
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2 answers

AVAssetWriter codec type hevc

I a trying to transcode an H264 video to HEVC using AVAssetWriter and it fails on iPhone 6s. Supposedly, the iPhone 6s supports HEVC for transcoding, not real-time video encoding. The same code works on iPhone 7 and above. If the iPhone 6s doesn't…
Deepak Sharma
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3
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3 answers

AVAssetWriterInput append fails with error code -11800 AVErrorUnknown -12780

I am trying to capture camera video in memory using AVCaptureSession so that I can later write the video data to a movie file. While I have been able to successfully start a capture session, I am not able to successful write the CMSampleBuffers I've…
mmontalbo
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3
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How to create several mp4 files with AVAssetWriter at the same time

I try to save four video streams with AVAssetWriter on the iPhone as .mp4. With three streams everything works fine, but the 4th mp4 file is always empty. Here is a piece of my code: -(void)writeImagesToMovie:(CVPixelBufferRef) buffer :(int)…
AxelHerbert
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1 answer

How do you sync video and audio using AVAssetWriter?

Background I use AVAssetWriterInput.append to append sample buffers to the writer. Sometimes, I switch off the audio input (if the user wants to temporarily disable audio input), so the append method will not be executed while the append method in…
LiYanan2004
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0 answers

isReadyForMoreMediaData and AVAssetWriterInput

I created a screen recording app. Before appending the buffer to the writer, I check if the isReadyForMoreMediaData is true. But sometimes it will constantly return false and won’t become true until I call markAsFinished I have no idea how to fix…
LiYanan2004
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2
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2 answers

AVAssetWriterInput - Insufficient video frames for Captured Audio

I've got a moderately complicated AVAssetWriterInput setup that I'm using to be able to flip the camera while I'm recording. Basically run two sessions, when the user taps to flip the camera I disconnect session 1 from the output and attach session…
nickneedsaname
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2
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1 answer

AVAssetWriter - Set Custom frame rate

I am using AVAssetWriter to write video frames from ARSession using delegate. func session(_ session: ARSession, didUpdate frame: ARFrame) See below the code used to write images. How can I set custom frame rate like 24, 30 or 60 etc as per our…
jpulikkottil
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1 answer

AVAssetWriter NSOSStatusErrorDomain Code=-16155

I'm having an error when I'm recording a long video. The weird thing is this happens always when I have been recording for 1 hour and 30 min aprox. I'm recording a video and two audio tracks using AVAssetWriter. Error Domain=AVFoundationErrorDomain…
Pablo Martinez
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