Cant't transcode with NVENC

Andre-Guy Otis · 2021-01-29T02:03:37+00:00

Hello, I tried to compile tvheadend from git but I can't get the NVENC transcoder working. I configure the build with --enable-nvenc I was able to compile...

Jonathan Young

Just like to say that it works for me too (after applying the fix to profile.c) in Kodi.

However, I can't get the codec preset to work correctly. I think nvenc now needs p1 ... p7 rather than Slow, Medium or Fast etc. The only option that does not throw a warning is Default.

Would it be possible to add these options when using nvenc?

dorin ilut

Did the update to 4.3-1966~g04853f0da. it's running well. still getting the same messages as my previous post, but it's running.

kosacik 1

I am facing same issues using NVENC transcoding. My tvh version is tvheadend_4.3-1975, but the same is with 1940.
I thought, it is an nvidia driver issue, so i tried few versions. But it is always the same. Then i found, that if Watching via kodi, it looks like session is not exited correctly and remains running in gpu memory (nvidia-smi), but When using vlc, memory is clearing itself fine (same profile). One session takes around 80MB, so after 50 chanell changes, only sound remains :-)

Flole

So you aren't facing this issue but you're facing the "session not cleaned" issue? There's a patch for that on GitHub (which is not perfectly correct but works for now), so you might want to try that.

Saen Acro

When building FFMPEG with full nvidia hardware acceleration decode/encode/resize/deinterlace


--enable-cuda-nvcc
--enable-cuvid
--enable-nvenc
--enable-cuda-llvm
--enable-libnpp

!!!libnpp cannot be statically linked.

llbnpp need to be instaled on OS

@ user#14626 can be maked more detailed check and informing message when some of them missing.

Rene Wagler

Kiril St. wrote:

> @ Flole Systems, I investigate a little more, and found that commit be37f9d (profile: reshuffle code in sharer destroy) is caused this problems! Im not familiar with github pull request features, so i provide working code in text file. Please check, and review. Tested wit http and htsp user on same channel, also 2 htsp users on same channel, work without problems!

WORKS! T H I S is the best job that ever been done!!!

This beatifull fix unfortunately is still NOT includet in official TVH git repo -.- why?? its 7 month ago ?

Flole

It's not beautiful and definitely not the best job ever done as the code is not thread-safe. That's why it's not included yet. If a proper fix is provided it can be reviewed and then possibly be merged.

Saen Acro

Flole Systems wrote:

> It's not beautiful and definitely not the best job ever done as the code is not thread-safe. That's why it's not included yet. If a proper fix is provided it can be reviewed and then possibly be merged.

Аre there any specific guidelines, or is this a general impression,
what exactly needs to change?

Exact direction.

The purpose of the exercise is to improve the product,

not to refuse developers to offer code due to unclear explanations.

I do not believe that anyone will mind if a corrective code of proposals is proposed.

Тeam work.

Kiril St.

> Rene Wagler wrote:
> > T H I S is the best job that ever been done!!!
>

> This job is basically to revert specific change, a little tweaked to match current code. Thanks must go to Flole Systems for pointing right place, where we look!

Rene Wagler

sooo when i say the most beautyfull code i mean im wayting for more than a Year of a fix like that. It was painfull. And now im happy that someone find a fix that workes as it should

Kiril St.

Rene Wagler wrote:

> It was painfull.

Agree with that. Great feature, but with this bug is useless!

Jonathan Young

Please Please Please can we get someone to look into this code so that it can be merged into the master branch? I need to use nvenc to transcode for my low powered Kodi client because spawn will not work with kodi htsp plugin.

Very grateful for all the hard work but there has not been any progress for a year now.

I am begging.

Flole

Should be fixed now.

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