iOS Recorded Video playback is mute when > 10 Seconds

[WilliamABradley]

Steps to reproduce 📜

Repro repo: https://github.com/WilliamABradley/VideoCaptureDemo

1. Run the App on an iOS Device (Problem observed on iPad Pro (2nd Gen w/ 11.3), enable Permissions for Microphone and Camera.

2. Record Video for 11 seconds or longer (Down to 4 on the Countdown)

3. Play the Video back on the Playback page, there is no sound.

Expected behavior 🤔

Any video length should playback with audio.

Actual behavior 🐛

Videos longer than 11 seconds play with no audio.
Audio is contained in the file, as when uploaded to Dropbox, it has audio.

I have tried delaying playback of the player, thinking that maybe a file handle was still open, saving the audio data, but this does not work, and playing the video cold (App restart, the audio is still mute).

Configuration 🔧

Version: 2.x

Platform:

• 📱 iOS
• 🤖 Android
• 🏁 WPF
• 🌎 UWP
• 🍎 MacOS
• 📺 tvOS
• 🐒 Xamarin.Forms

[WilliamABradley]

ping @martijn00

[WilliamABradley]

I found the issue, it turns out AVPlayer can't play a video from AVCaptureSession that has a .MP4 extension that is longer than 10 seconds by default.
This is due to fact that AVCaptureMovieFileOutput creates a MovieFragment every 10 seconds. MP4 doesn't support fragmentation, so for some reason all iOS devices can't play the video, but everything else can.

The fix:

var movieOutput = new AVCaptureMovieFileOutput
{
    MovieFragmentInterval = CoreMedia.CMTime.Invalid
};

Turns out this library wasn't the issue, but the video created without this change that is > 10 seconds, <= 15 seconds isn't playable (Even in the Photos app!)

[Ludotrico]

@WilliamABradley I am having a similar issue with Swifty Cam, a top Swift media capture library. Do you know of any solution in Swift?

[sumitkapoorshineweb]

I found the issue, it turns out AVPlayer can't play a video from AVCaptureSession that has a .MP4 extension that is longer than 10 seconds by default. This is due to fact that AVCaptureMovieFileOutput creates a MovieFragment every 10 seconds. MP4 doesn't support fragmentation, so for some reason all iOS devices can't play the video, but everything else can.

The fix:

var movieOutput = new AVCaptureMovieFileOutput
{
    MovieFragmentInterval = CoreMedia.CMTime.Invalid
};

Turns out this library wasn't the issue, but the video created without this change that is > 10 seconds, <= 15 s

I found the issue, it turns out AVPlayer can't play a video from AVCaptureSession that has a .MP4 extension that is longer than 10 seconds by default. This is due to fact that AVCaptureMovieFileOutput creates a MovieFragment every 10 seconds. MP4 doesn't support fragmentation, so for some reason all iOS devices can't play the video, but everything else can.

The fix:

var movieOutput = new AVCaptureMovieFileOutput
{
    MovieFragmentInterval = CoreMedia.CMTime.Invalid
};

Turns out this library wasn't the issue, but the video created without this change that is > 10 seconds, <= 15 seconds isn't playable (Even in the Photos app!)

this is accepted answers, Recently I got same issue and did changes in this file 'SwiftyCamViewController.swift' inside 'configureVideoOutput' method

    let movieFileOutput = AVCaptureMovieFileOutput()
    movieFileOutput.movieFragmentInterval = CoreMedia.CMTime.invalid ///Added to fix not recording sound for more than 10 second video when recording with camera

Hopefully this helps someone to fix this issue....