Controlling the media sequence values of individual segments

[kapvode]

I have an application that records HLS streams and I often need to replicate the media sequence values of some source stream. One thing I encounter fairly frequently is that the media sequence is restarted or it could be that some media segments are dropped. In any case, I need more precise control of the media sequence values of individual segments. It is not simply a matter of incrementing the sequence by one.

I already have this working correctly. This is how it works.

I call MediaPlaylist.Remove() if I have to, then I create a segment, set its SeqId and call MediaPlaylist.AppendSegment().

Now I find the first segment in the playlist and set MediaPlaylist.SeqNo = firstSegment.SeqId.

I don't like how I find the first segment, and I was going to ask if you could expose a function that would return the head of the list.

I was also hoping that the changes in #116 would be helpful for my use case. In theory, the playlist could respect the sequence IDs that I set on the segments, and automatically set the media sequence of the playlist to the media sequence of the first segment (although this would break backwards compatibility).

But unfortunately, PR #124 breaks what I have right now. The SeqId values that I set on the segments before I append them to the playlist are lost.

So now I have two problems:

1. I need the SeqId values that I set on the segments to be preserved.

2. I would like a way of accessing the first segment in the playlist.

The second thing should be easy, but I'm worried about the first one.

Do you think you could support such a use case?

[kapvode]

This is no longer relevant to me.