Tvheadend

Be more specific, question is not understandable.

Hello,
I wanted to edit the ffmpeg command that generates the stream, the stream profiles, I wanted to try to make changes directly on the profiles

use MPEG-TS Spawn/built-in profile

yes understand, but uses a lot of cpu and becomes unstable, at least with the command that I created, then if there is a better command of mine and someone want to give me a hand I thank you

this is my command line
/opt/ffmpeg/bin/ffmpeg -i pipe:0 -preset superfast -bitrate 2000k -bufsize 1500k -c:v libx264 -c:a aac -c:s copy -f mpegts pipe:1

Use GPU /vaapu, nvidia/, limit treads /-threads 1/, reduce present /ultrafast, realtime/.

hello thanks for the answer,
the problem is that it ignores transcoding,so the channel as it enters goes out -> http://prntscr.com/lzczp3
if limits bitrate or size ignores it, and the cpu I have not solved yet with -threads 1

ffmpeg -fflags +genpts -nostats -nostdin -hide_banner -loglevel quiet -hwaccel cuvid -c:v h264_cuvid -deint 1 -surfaces 8 -drop_second_field 1 -vsync 0 -resize 1280x720 -i    -map 0:v -c:v h264_nvenc -preset slow -profile:v high -level 4.1 -rc vbr -cq 1 -bf 2 -g 25 -b:v 2200k -minrate 2200k -maxrate 2200k -bufsize 1002k -map 0:a -c:a libfdk_aac -ac 2 -b:a 128k -strict experimental

use this as starting point

https://thoaimedia.com/ffmpeg-tools/ffmpeg-command-generator/

But for example i can edit the profile strema like example "webtv-h264-aac-matroska" and add -threads 1 ?
i use this webtv-h264-aac-matroska and work fine, my problem is use all threads and CPU if i set -threads 1 it will use a lot less cpu

WEBTV profiles are for browser capability
what is your cpu?

this is my CPU
Intel(R) Core(TM) i3-6100 CPU @ 3.70GHz

With GPU on this CPU you can compress up to 18 HD channels.

https://trac.ffmpeg.org/ticket/5708?cversion=0&cnum_hist=8

with the Nvidia video card?
or GPU integrated?

With GPU on this CPU

unfortunately I'm not an expert on these things, I do not know how to do it, how to move first

sorry, but since I know the simple CPU transcoding with the stream profiles use WEBTV codec AAC and it's always fine online, is there a way to simply add add-1 threads? already doing -1 threads I can make someone in more channels in HD

modify your

/opt/ffmpeg/bin/ffmpeg -i pipe:0 -preset superfast -bitrate 2000k -bufsize 1500k -c:v libx264 -c:a aac -c:s copy -f mpegts pipe:1

with

/opt/ffmpeg/bin/ffmpeg -i pipe:0 -preset ultrafast -b:v 2048k -minrate 1024k -maxrate 3096k -bufsize 1500k -c:v libx264 -c:a aac -threads 2 -c:s copy -f mpegts pipe:1

or compile tvh with --enable-vaapi
https://tvheadend.org/boards/4/topics/24116

thanks for your command
/opt/ffmpeg/bin/ffmpeg -i pipe:0 -preset ultrafast -b:v 2048k -minrate 1024k -maxrate 3096k -bufsize 1500k -c:v libx264 -c:a aac -threads 2 -c:s copy -f mpegts pipe:1

but don't work
the stream start but not trascode in your command there are the
bitrate 2048k
maxrate 3096k
preset ultra fast

but you can see go out 7000/8000k
http://prntscr.com/lzg954

not work the transcoding ffmepg i think

nothing to do, forgive me if I insist, but where is the ffmpeg that creates the profile WEBTV codec AAC
add -threads 1 i think work and solve the preblem

Test with input url /from playlist/
and output to multicast for example
There is something with is wrong.

test with
http://www.ipvideotrans.com/live-video-transcoding.html

my intervention was aimed at modifying an existing profile that is stable, just add the command for the treaders and finished, I can not figure out where the profile command is located webtv-h264-aac-matroska or webtv-h264-aac-mpegts for edit

hacksat hacksat wrote:

my intervention was aimed at modifying an existing profile that is stable, just add the command for the treaders and finished, I can not figure out where the profile command is located webtv-h264-aac-matroska or webtv-h264-aac-mpegts for edit

in source code of tvh
https://github.com/tvheadend/tvheadend/blob/66d6161c563181e5a572337ab3509a835c5a57e2/data/conf/transcoder/profiles
https://github.com/tvheadend/tvheadend/blob/66d6161c563181e5a572337ab3509a835c5a57e2/src/webui/static/tv.js
https://github.com/tvheadend/tvheadend/blob/66d6161c563181e5a572337ab3509a835c5a57e2/data/conf/transcoder/codecs

thanks for the reply, but how do you add a threaders instead of using them all? it could be interesting for everyone since we know that it consumes less CPU based on the processor

Fill free to add new issue for this
https://tvheadend.org/projects/tvheadend/issues/new

ok thanks

maybe is not best way
i don't have answare