How to rtmpdump on Linux?

[bloodycorpse]

Hello, I'm trying to play livestreams from mips.tv and ucaster but I failed

this works, from another site example:

rtmpdump -v -r "rtmp://207.244.67.9/iguide" --playpath=mvu912lm6c5dzz6 -W "http://cdn1.iguide.to/player/secure_player_iguide_embed_token.swf" -p "http://www.iguide.to/embedplayer_new.php?width=710&height=415&channel=16289&autoplay=true" -T "#ed%h0#w18623jsda6523lDGD" -o - | mplayer -

RTMPDump v2.4
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
MPlayer2 2.0-728-g2c378c7-2+b2 (C) 2000-2012 MPlayer Team

Playing -.
Reading from stdin...
Starting Live Stream
INFO: Metadata:
INFO:   presetname            Custom
INFO:   creationdate          Mon Oct 20 20:17:39 2014
INFO:   videodevice           vMix Video
INFO:   framerate             25.00
INFO:   width                 720.00
INFO:   height                404.00
INFO:   videocodecid          avc1
INFO:   videodatarate         1000.00
INFO:   avclevel              41.00
INFO:   avcprofile            77.00
INFO:   videokeyframe_frequency5.00
INFO:   audiodevice           vMix Audio
INFO:   audiosamplerate       22050.00
INFO:   audiochannels         1.00
INFO:   audioinputvolume      75.00
INFO:   audiocodecid          .mp3
INFO:   audiodatarate         48.00
0.598 kB / 0.00 secDetected file format: FLV (Flash Video) (libavformat)
78.863 kB / 4.94 sec[flv @ 0xb62d78c0]max_analyze_duration 5000000 reached
[flv @ 0xb62d78c0]Estimating duration from bitrate, this may be inaccurate

this fails, is the same issue with mips.tv and clone sites...

rtmpdump -v -r "rtmp://212.7.212.9/live" --playpath=tusmuertoslc22?id=75491 -W "http://www.ucaster.eu/static/scripts/fplayer.swf" -p "http://www.ucaster.eu/" -C S:OK -o - | mplayer -  

RTMPDump v2.4
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
MPlayer2 2.0-728-g2c378c7-2+b2 (C) 2000-2012 MPlayer Team
INFO: Connected...

Playing -.
Reading from stdin...

this stops here and does not work, not load, not play.

I think I need to change something to make it work
I'm using Debian Jessie, and mplayer.

sorry my english i'm spanish