SeqId is not set when parsing media playlist

[thinkski]

Upon decoding a media playlist, I expected SeqId of each segment to contain the sequence id of each segment. For example, if SeqNo of the playlist were 123 and it had three segments, I would expect the SeqId of the three segments to be 123, 124, and 125. However, they are all 0, regardless of SeqNo.

My current workaround it to populate the sequence ids after the fact myself:

pls, listType, err := m3u8.DecodeFrom(reader, true)

switch listType {
    case m3u8.MEDIA:
        // Cast to media playlist type
        mediapls := pls.(*m3u8.MediaPlaylist)

        // Populate segment sequence id from playlist sequence number
        for i, segment := range mediapls.Segments {
            if segment == nil {
                break
            }
            mediapls.Segments[i].SeqId = mediapls.SeqNo + uint64(i)
        }
        ...

[leikao]

dup of #116

[thinkski]

I would say the later issue is a duplicate of the earlier issue 😉 But glad to see the SeqId issue is being addressed.

[leikao]

@thinkski I made a PR #124 to solve this issue, welcome to try it.