Hello everyone,
I really enjoy TVheadend, but I am also struggeling with peculiarities in my setup.
I have a PCTV416 DVB-S USB stick running on a Raspberry 3B (RPI), which is working fine for playback and uncompressed recording, but obviously has limited power for transcoded recording (stuttering in recordings, ...).

Therefore, I decided to set up a TVheadend client on my Synology DS218 (NAS), which should have more power for these tasks. The RPI hosts a SATIP server and I can see it in the NAS TVH-client (see attached screenshot).

However, the NAS stream works not reliably. The mux scan has a lot of muxes with a faulty search results. Not every channel is found (however, they are found on the RPI-host). When I start network playback on my computer (e.g. via VLC player http://ip.addr.to.nas:9981/stream/channelid/1293363978?profile=pass ...) not every channel can be streamed reliably. Switching between channels takes a long time and for some channels only audio is played. Streaming from the RPI host to the computer works fine, however.

I can exclude a bad network connection: everything is directly wired via 1GBit Lan and network speed is sufficient between all components.

Do you have any idea, what is going wrong in my setup?

Many thanks in advance!
1. wrong configured sat>ip client
do you have diseq configured, as seen on picture?
2. NAS + docker = slow
3. RPi device is for developers, not for production.

USB + LAN = big lag on data transfer.

Instal some ELEC (TVH + KODI) and use HDMI cable to TV

Thanks for your reply

1.) Which picture do you mean? Sorry, I am not very much into details of DISEQ and how to configure it. What would be the correct version? As I only have one Coax cable at my RPI, I deactivated positions 2-4 (AB, BA, BB). However, behavior stayed the same.
2.) Sorry, I heard about dockers, but I am no expert. TVheadend was installed on the DSM.

3.) The RPI is not the bottleneck here.

HDMI cable to TV is not possible and not my use case. I want a TV recording station with the option of wireless streaming to mobiles.

With a lot of try and error, I hopefully got it working with the following change in the "TVheadend:9****" TV-Adapter settings:
- Full Mux mode enabled: checked
- RTP/AVP/TCP transport supported: checked

- Force Pilot for DVB-S2: checked

I am happy, that it seems to be working for now, but I am even happier if anyone could explain some more details to me, why it is working now :)