Custom Exoplayer Mediasource -- Where To Start?

I'm working on creating a custom media player using ExoPlayer (I've previously opened several questions on the same topic, because I'm very new to Android development and it seems

Solution 1:

Therefore the parsing of this XML file should be the responsibility of the video player, not of the client's app.

So you are essentially trying to create a new schema for distributing video for an underlying player (whatever that might be, to deal with). This seems like client side logic. However, you want an answer so I'll try and give you one.

First, Extractor in ExoPlayer should not be used for parsing your XML, as per the docs:

Extracts media data from a container format.

This would be used for extracting the video data from a video container e.g. MP4.

In your scenario you probably want to look at something similar to the DashManifestParser who uses the ParsingLoadable.Parser whose responsibility it is to parse your input model. This ParsingLoadable.Parser is then used by MediaSource to get the information it needs for playback.

However, I would not recommend doing any of that. The best option for you in this scenario would be to create a Parser to grab the content Url and just pass that to an underlying player. You content Url will link to an MP4 container, perhaps DRM'd content etc, but all of that can be handled by the player just fine without adding all of this other complexity.

As for creating adverts, this can be done in a number of ways:

• Have a single player instance, swapping between content and adverts. Easy but then you need to keep track of position information and also you will have buffering when you switch.
• Have a single player instance but use ConcatenatingMediaSource, for this you would parse the xml create a MediaSource for the content and each advert, you then add these to the ConcatenatingMediaSource.
• Have a single player instance but use the AdsLoader provided by ExoPlayer. This is the best solution but the documentation is sadly lacking. For this you can provide a link to load adverts and a separate link to load content.

So. To summarise.

• Create a parser that can get the info you need from the XML i.e. content link and advert links.
• Create a player that creates a media source for the content and then media sources for the adverts, add these to the concatenating media source.

If you'd like to see how to do certain aspects I would suggest taking a look at our open source library that uses Exo-Player under the hood. We've even recently started to use an AdsLoader. https://github.com/novoda/no-player