No sound in shipping build when playing video in Media Player

Thanks 3dids, we fixed this in the Master branch. Our fix is similar. It did not make it into 4.7, but it will be in 4.8:

void UMediaSoundWave::PostLoad()
{
	Super::PostLoad();

	if (!HasAnyFlags(RF_ClassDefaultObject) && !GIsBuildMachine)
	{
		InitializeTrack();
	}
}


void UMediaSoundWave::HandleMediaPlayerMediaChanged()
{
	InitializeTrack();
}

This will also fix the cooking of media sound waves in packaged builds.