how to properly receive?

[fixerivan]

I am trying to receive the RTMP stream

running ffmpeg as rtmp server via ffmpeg -re -f flv -listen 1 -i rtmp://10.10.10.50:8080/live/app -vcodec copy -f flv -listen 1 rtmp://10.10.10.50:1935/live/app

app is configured to publish to rtmp://10.10.10.50:8080/live/app

then i connect the rtmp client via

rtmpdump -r rtmp://10.10.10.50:1935/live/app -R -o - | ffplay -

but all I see is a black screen ...

what setup are you using for devel / testing as for the rtmp server / client?

thx

[fixerivan]

ok my bad, didnt start the preview first :)

would like to know what rtmp backend you are using anyway! thx