Exoplayer Subtitle

Question

Hi I'm trying to add Subtitle for audio using data of https://grepp-programmers-challenges.s3.ap-northeast-2.amazonaws.com/2020-flo/song.json playing audio and setting the PlayerControlView was fine but dealing with SubtitleView got stuck lyric String

how can I sync and show this String through exoplayer.SubtitleView

I'm using Exoplayer ver 2.18.3

Answer 1

If you have a custom subtitle format, i think you should implement a custom SubtitleDecoder. For example you can check the implementation of SubripDecoder from exoplayer.

After that, pass your subtitle decoder to the player using the custom implementation of `SubtitleDecoderFactory'.

class CustomRenderersFactory(context: Context) : DefaultRenderersFactory(context) {
    override fun buildTextRenderers(
        context: Context,
        output: TextOutput,
        outputLooper: Looper,
        extensionRendererMode: Int,
        out: ArrayList<Renderer>
    ) {
        out.add(TextRenderer(output, outputLooper, CustomSubtitleDecoderFactory()))
    }
}

Now just add a subtitle track to your MediaItem/MediaSource