How to transcode TBS stream to 720P with Nvidia?

tenente

Hello, I hope this message finds you all well!
I'm doing some tests with tvheadend, and I would like to know how to transcode a source stream from a tbs, to 720P using NVIDIA video cards?
Can anyone help me with this issue?

Tony Wagner

tenente As an alternative to recompiling TVHeadend and using stream profiles, you may be able to use ffmpeg in a "pipe://" command as described here:
Custom MPEG-TS Input

I don't have a TBS or NVIDIA card, but when I set up a channel for transcoding, I actually set up two channels for it. The first channel was just the regular passthrough stream (no transcoding) directly from my TV adapter; I granted access to this first channel to my LAN user and to an anonymous local user (see How configure users to access playlist in local network without authentification for example).

The second channel was an IPTV stream using ffmpeg in a "pipe://" command, using the first channel's TVHeadend stream URL (via the anonymous local user) as its ffmpeg input. Then it used ffmpeg's hardware-accelerated transcode options before returning its output to TVHeadend as a MPEG-TS pipe. I granted access to this second transcoded channel to any remote TVHeadend user accounts.

That way, I didn't have to worry about recompiling TVHeadend or changing stream profiles.

Richard Zimmerman

Hello,
you need tvheadend compiled with nvidia librairies (set nvenc to yes in configure)
In configuration/stream/codec profiles, add a new profile or clone an existing one.
choose a height of 720, hardware acceleration, choose your nvidia device, and set a bitrate, later you can play with a lot of options.
go to the stream profiles tab, and create a new stream with the new created codec profile.
choose the new created sream profile in the user profile and try it.
it is for streaming only, you can do the same for recording.
just note that if you have recorded the native stream (with the pass profile for example), you can not playback it with a specific streaming profile (or I don't know how to do that...)