feat: add raw list of segment lines to manifest

[jeff-transmit]

Feature #49

Adds raw segment lines to the parsed manifest.

Playlist:

#EXTM3U
#EXT-X-PLAYLIST-TYPE:VOD
#EXT-X-TARGETDURATION:10
#EXTINF:10,
media-00001.ts
#EXTINF:10,
media-00002.ts
#EXTINF:10,
media-00003.ts
#EXTINF:10,
media-00004.ts
#EXT-X-ENDLIST

Parsed output:

{
  allowCache: true,
  mediaSequence: 0,
  playlistType: 'VOD',
  segments: [
    {
      duration: 10,
      raw: [
        '#EXTINF:10,',
        'media-00001.ts'
      ],
      timeline: 0,
      uri: 'media-00001.ts'
    },
    {
      duration: 10,
      raw: [
        '#EXTINF:10,',
        'media-00002.ts'
      ],
      timeline: 0,
      uri: 'media-00002.ts'
    },
    {
      duration: 10,
      raw: [
        '#EXTINF:10,',
        'media-00003.ts'
      ],
      timeline: 0,
      uri: 'media-00003.ts'
    },
    {
      duration: 10,
      raw: [
        '#EXTINF:10,',
        'media-00004.ts'
      ],
      timeline: 0,
      uri: 'media-00004.ts'
    }
  ],
  targetDuration: 10,
  endList: true,
  discontinuitySequence: 0,
  discontinuityStarts: []
}

[gkatsev]

Can you provide more info on why this would be useful?

[gkatsev]

Ah, missed the link to the issue.

[gkatsev]

I think my main concern here is that we often have memory issues in VHS and keeping around even more strings is going to exacerbate it.

[gkatsev]

One alternative would be to feature flag this and make it default off and then if someone needs it, they can have it.

I think a concrete usecase would be nice, though.

[jeff-transmit]

One alternative would be to feature flag this and make it default off and then if someone needs it, they can have it.

I think a concrete usecase would be nice, though.

In our case, we need to be able to change and rebuild the playlist after using the parsed playlist and it would be more efficient to do this with the raw segment lines rather than processing the whole playlist again.

[gkatsev]

Are you using m3u8-parser directly or via VHS?

[jeff-transmit]

Are you using m3u8-parser directly or via VHS?

We are using it directly.

[peterblazejewicz]

IIMO there could be a pluggable metod to create event data or could be via events allowing to movidy events/source as callback, kind of the data parser for custom tari. No constructor changes (imagine, next version requires new param, actual core feature, this time required, to be added or removed)