Subtitles for AVPlayer/MPMoviePlayerController

Question

I am using m3u8 video format for streaming the video and now I need to display subtitles for the same.

I searched in Apple Documentation and found that I can achiev

Answer 1

This is the Swift version of @JohannesFahrenkrug answer. Hope this is useful for someone:

    let localVideoAsset = Bundle.main.url(forResource: "L1C1P1C3", withExtension: "mp4")

    //Create AVMutableComposition
    let videoPlusSubtitles = AVMutableComposition()

    //Adds video track
    let videoTrack = videoPlusSubtitles.addMutableTrack(withMediaType: .video, preferredTrackID: kCMPersistentTrackID_Invalid)

    try? videoTrack?.insertTimeRange(CMTimeRangeMake(kCMTimeZero, localVideoAsset.duration),
                                of: localVideoAsset.tracks(withMediaType: .video)[0],
                                at: kCMTimeZero)

    //Adds subtitle track
    let subtitleAsset = AVURLAsset(url: Bundle.main.url(forResource: "L1C1P1C3", withExtension: ".mp4.vtt")!)

    let subtitleTrack = videoPlusSubtitles.addMutableTrack(withMediaType: .text, preferredTrackID: kCMPersistentTrackID_Invalid)

    try? subtitleTrack?.insertTimeRange(CMTimeRangeMake(kCMTimeZero, localVideoAsset.duration),
                                        of: subtitleAsset.tracks(withMediaType: .text)[0],
                                        at: kCMTimeZero)