private async Task StartSource(string url)
{
if (url == MAX_URL)
{
_maxSource.ForceKeyFrame();
await(_maxSource.IsPaused() ? _maxSource.ResumeVideo() : _maxSource.StartVideo());
}
else
{
_testPatternEncoder.ForceKeyFrame();
await _testPatternEncoder.StartVideo();
await(_testPatternSource.IsVideoSourcePaused() ? _testPatternSource.ResumeVideo() : _testPatternSource.StartVideo());
await(_musicSource.IsAudioSourcePaused() ? _musicSource.ResumeAudio() : _musicSource.StartAudio());
}
}