A multivariant HLS URL that plays successfully on my desktop (smplayer) was failing on Roku.
Video node in debug console contained (did not dump errorInfo AA)
errorCode: -3
errorMsg: "An unexpected problem (but not server timeout or HTTP error) has been detected."
errorStr: "exception:HTTP server returned error code:extra:etype:buffer"
Wireshark showed that the multi-variant as well as some of the variant m3u8 URLs were successfully fetched (status 200) but upon hitting 404 on one of the variants the stream play attempt was aborted.
Sometimes some (live) video transcode processes could become offline and produce just 4 of the 5 listed variants - a better user experience would be if the player will pretend those 404 variants are not even listed.
Here is the Info column from Wireshark
GET /hls/live/2024691/2024691/master.m3u8 HTTP/1.1
HTTP/1.1 200 OK (application/x-mpegurl)
GET /hls/live/2024691/2024691/master.m3u8 HTTP/1.1
HTTP/1.1 200 OK (application/x-mpegurl)
GET /hls/live/2024691/2024691/source1_1.8k/chunklist.m3u8 HTTP/1.1
HTTP/1.1 200 OK (application/x-mpegurl)
GET /hls/live/2024691/2024691/source1_2.5k/chunklist.m3u8 HTTP/1.1
HTTP/1.1 200 OK (application/x-mpegurl)
GET /hls/live/2024691-b/2024691/source1_2.5k/chunklist.m3u8 HTTP/1.1
HTTP/1.1 404 Not Found
