Getting Illegal state exception Any help?

[ashirmehmood1996]

    --------- beginning of crash
2021-01-21 00:19:57.561 15225-15643/eu.sisik.reversevideo E/AndroidRuntime: FATAL EXCEPTION: IntentService[ConversionService]
    Process: eu.sisik.reversevideo, PID: 15225
    java.lang.IllegalStateException
        at android.media.MediaCodec.native_stop(Native Method)
        at android.media.MediaCodec.stop(MediaCodec.java:2147)
        at eu.sisik.reversevideo.AllToKeyFrameConverter.releaseConverter(AllToKeyFrameConverter.kt:196)
        at eu.sisik.reversevideo.AllToKeyFrameConverter.convert(AllToKeyFrameConverter.kt:50)
        at eu.sisik.reversevideo.VideoProcessingService.onHandleIntent(VideoProcessingService.kt:27)
        at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:78)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:224)
        at android.os.HandlerThread.run(HandlerThread.java:67)

I am testing on API 29