adaptivedemux: Download fragment only for activated stream
Submitted by Seungha Yang
Link to original bug (#775132)
Description
MPEGDASH supports multi-video/audio tracks by representing them as AdaptationSets (I'm not sure whether the latest version of HLS or MSS are supporting it or not). And downloading all fragments for the all tracks might be waste of bandwidth. As an optional way, downloading fragments of selected track could be optimal for some usecase.