ffmpeg slow startup.

nricsi94

Hello, I was given an ffmpeg that works, it only takes 5-8 seconds to start, what could be wrong with it?

/usr/lib/jellyfin-ffmpeg/ffmpeg -hwaccel_device /dev/dri/renderD128 -threads 4 -i pipe:0 -map a -map -m:language:ENG? -map v -codec:v libx264 -preset veryfast -b:v 3000k -maxrate 3000k -coder 1 -tune zerolatency -mbd rd -codec:a copy -strict experimental -async 1 -sn -fflags +genpts -metadata service_provider=STRING -metadata service_name=STRING -f mpegts pipe:1 -movflags +faststart
Thank you very much in advance for your help.

ukn_unknown

nricsi94
If you want to transcode video using SW encoding you don't need ffmpeg ... you can achieve that by transcoding natively with TVH. Compile will libav and vaapi (in order to have hw decoding). I always compiled the master so I can't say for sure if the precompiled debs have transcoding selected during compile.

Chris G

You are doing a lot and re-encoding.
5 to 8 seconds seems normal to me.

nricsi94

thankyou how to best?

Chris G

What are you trying to do?
I'm not an FFmpeg expert, so I can't really help.
All I can see is you have many commands, which is why it takes so long to start.

nricsi94

Do you know anything less that would be a quick start? mpegts

Chris G

The quickest way to get mpegts would be something like this:
ffmpeg -i pipe:0 -c copy -f mpegts pipe:1
Nothing is edited, just the container is converted to mpegts.