I had an older model Swann DVR (srdvr-84500h). The Hikvison directories worked for me:
rtsp://[User]:[Password]@x.x.x.x:554/Streaming/Channels/[C]0[S]
[C] is camera channel
[S] is Main Stream “1” or Sub Stream “2”
camera:
- platform: ffmpeg
name: CCTV Front Door
input: rtsp://user:[email protected]:554/Streaming/Channels/101
Hope this helps those with older models.