location

The address these bytes came from when that is not the address they were asked for, as after an HTTP redirect, or null, the default, when they came from that address (#167).

FFmpeg's HLS reader resolves the relative addresses inside a playlist against it, as it does after a redirect that FFmpeg's own http follows, so the segments, keys and variants of a redirected playlist are asked for beside the place it really is. It is read once, when the source is opened: by MediaSource.open for the source it is given, and as soon as a MediaByteOpener returns it for every other one. A source that follows its redirects only as it reads must have followed them by then. An empty address is the same as null.