rtp stream: "At least one output file must be specified"

Questions involving a Windows version of FFmpeg.
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Pilot65
Posts: 1
Joined: Sat Mar 23, 2019 11:13 pm

rtp stream: "At least one output file must be specified"

Post by Pilot65 » Sat Mar 23, 2019 11:26 pm

Trying to stream system audio from Windows box over LAN to to RasPi...
This works ok, getting the tone from the RasPi:

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ffmpeg -re -f lavfi -i aevalsrc="sin(800*2*PI*t)" -ar 8000 -f mulaw -f rtp rtp://192.168.1.3:1234
But trying with this:

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ffmpeg -f dshow -i audio="Stereo Mix (Realtek High Defini" -acodec libmp3lame -ab 128k -ac 2 -ar 44100 -re -f rtp://192.168.1.3:1234
Gives me: "At least one output file must be specified"
What to do?

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