need help with link to mp3-file

[loner]

I want to download the second stream on this site:

http://www.kulturradio.de/programm/literatur/walter_serner_preis1/walter_serner_preis0.html

I figured out the following direct url but net transport says it's larger than two gigs which can't be true for 21 minutes audio:

rtmp://stream5.rbb-online.de/kul/flash/programm/kulturtermin/2011/kulturtermin_0478.mp3

So what's the right url?

[Bahman]

Use this:

rtmpdump -r "rtmp://stream5.rbb-online.de/kul" -a "kul" -y "mp3:/programm/kulturtermin/2011/kulturtermin_0478" -o kulturtermin_0478.flv

RTMPDump v2.4 GIT-2011-07-11 (Compiled by KSV)
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
Starting download at: 0.000 kB
INFO: Metadata:
INFO:   duration              1287.97
13.623 kB / 0.81 sec (0.0%)

[loner]

thanks, Bahman
But why should I save the file with *.flv-extension?
Isn't it a normal mp3 file?

[Bahman]

Yes, It is!! but even if you save it as .mp3 extension, you will have a flash video file that just have audio with mp3 codec!!

Complete name                            : C:\temp\rtmpdump\kulturtermin_0478.mp3
Format                                   : Flash Video
File size                                : 4.72 KiB
Duration                                 : 287ms
Overall bit rate                         : 135 Kbps
_duration                                : 1287.967

Audio
Format                                   : MPEG Audio
Format version                           : Version 1
Format profile                           : Layer 3
Codec ID                                 : 2
Codec ID/Hint                            : MP3
Duration                                 : 287ms
Bit rate mode                            : Constant
Bit rate                                 : 128 Kbps
Channel(s)                               : 2 channels
Sampling rate                            : 44.1 KHz
Compression mode                         : Lossy

After downloading, convert it to a mp3 file with 128kbps bitrate!!

[loner]

After downloading, convert it to a mp3 file with 128kbps bitrate!!

Isn't it possible to extract the mp3-audio from the flv-file in a lossless way?

[Bahman]

We are talking about mp3 audio, not wave or m4a or flac or aif or ...!!!
if you convert this flv file to a mp3 file with the same values, in fact it's like you have extracted audio file with out any changes!! before converting it, notice at this values to set in output file:
Bit rate mode : Constant (CBR)
Bit rate : 128 Kbps
Channel(s) : 2 channels
Sampling rate : 44.1 KHz

then convert it!!