Code:
livestreamer "hlsvariant://http://89.248.172.57:1935/edge/_definst_/ro7c9eha0z96hpp/playlist.m3u8?xs=_we_cm83YzllaGEwejk2aHBwfDE0NDE2NjE5MjR8NjIuNzMuMTAuODd8NTVlZTAyN2MyZWJiZnw3YmMyZGZlZDdmOWUwMTMyODJkYzUzZjkwZGQ4MmMzMjgxZTIyMGI0" best -o discovery.ts
[cli][info] Found matching plugin stream for URL hlsvariant://http://89.248.172.57:1935/edge/_definst_/ro7c9eha0z96hpp/playlist.m3u8?xs=_we_cm83YzllaGEwejk2aHBwfDE0NDE2NjE5MjR8NjIuNzMuMTAuODd8NTVlZTAyN2MyZWJiZnw3YmMyZGZlZDdmOWUwMTMyODJkYzUzZjkwZGQ4MmMzMjgxZTIyMGI0
[cli][info] Available streams: 505k (worst, best)
[cli][info] Opening stream: 505k (hls)
[download][discovery.ts] Written 1.6 MB (9s @ 171.4 KB/s)
you can use the same value found with rtmpdumphelper