I can access the DLNA server from my LG TV in a different room and it works well.
But when I try to access using my new 4k ROKU box in another room using its Media Player app.
It finds the DLNA server on the SX88 but says 'No compatible media found in: LiveTV'

ROKU says - The following file formats are supported:
Video - H.264/AVC (.MKV, .MP4, .MOV)
Audio - AAC (.MKV, .MP4, .MOV); MP3(.MP3, .MKV); WMA (.ASF, .WMA, .MKV), FLAC (.FLAC, .MKV), PCM (.WAV, .MKV, .MP4, .MOV), AC3/EAC3 (.MKV, .MP4, .MOV, .
AC3), DTS (.MKV, .MP4, .MOV, .DTS), ALAC (.MKV, .MP4, .MOV, .M4A), Vorbis (.OGG, .MKV, .WEBM)
Playlists - .M3U, .M3U8, .PLS
Image – JPG, PNG, GIF (non-animated)

The following media formats are supported on Roku devices that support 4K (which I bought!)
4K Video - H.265/HEVC (.MKV, .MP4, .MOV); VP9 (.MKV, .WEBM)
4K Video - H.264 (Roku Premiere, Premiere+, and Ultra only)

Are there any streaming boxes / sticks that would work if ROKU is no good? or anything else I can do?
It works fine on my LG TV so not a network issue but a format / codecs and things I dont understand issue.

Many thanks
Keith