How to update MediaPlayerElement's buffer in realtime?

Question

I\'m creating Twitch player using MediaPlayerElement and I want to update MediaPlayerElement\'s buffer in real-time but I don\'t know how.

I tried to do it like this:

Answer 1

I figured this out. I have to use MseStreamSource.

First I need to create MseStreamSource with event like this:

streamSource = new MseStreamSource();
streamSource.Opened += (_, __) =>
{
    if (buffer is null)
    {
        // it will create buffer where I can write data
        buffer = streamSource.AddSourceBuffer("video/MP2T");
        buffer.Mode = MseAppendMode.Sequence;
    }
};

Then set the source:

StreamMediaPlayer.Source = MediaSource.CreateFromMseStreamSource(streamSource);

And if I want to add video I have to do it like this:

buffer.AppendBuffer(reader.ReadBytes(20 * 1024 * 1024).AsBuffer());

I have to make sure that buffer is not updating. This information provides IsUpdating property.