I'm not sure if this is what you're looking for...
Just open/play the link below and capture it using rtmpdumpHelper
http://www3.nhk.or.jp/nhkworld/commo...ay=true#popout
Code:
rtmpdump -r "rtmp://flv.nhk.or.jp/ondemand/" -a "ondemand/" -f "WIN 19,0,0,185" -W "http://www3.nhk.or.jp/nhkworld/common/swf/radioPlayer.swf" -p "http://www3.nhk.or.jp/nhkworld/common/player/radio/clip/?lang=id&key=/nhkworld/radio/program/indonesian/radio/update/201509072100_id_01.m4a&autoplay=true" -y "mp4:flv/nhkworld/radio/program/indonesian/radio/update/201509072100_id_01.m4a" -o "2015-10-06_05-01-20_201509072100_id_01.mp3"
Code:
C:\rtmpdump>rtmpdump -r "rtmp://flv.nhk.or.jp/ondemand/" -a "ondemand/" -f "WIN
19,0,0,185" -W "http://www3.nhk.or.jp/nhkworld/common/swf/radioPlayer.swf" -p "h
ttp://www3.nhk.or.jp/nhkworld/common/player/radio/clip/?lang=id&key=/nhkworld/ra
dio/program/indonesian/radio/update/201509072100_id_01.m4a&autoplay=true" -y "mp
4:flv/nhkworld/radio/program/indonesian/radio/update/201509072100_id_01.m4a" -o
"2015-10-06_05-01-20_201509072100_id_01.mp3"
RTMPDump v2.4
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
Starting download at: 0.000 kB
INFO: Metadata:
INFO: duration 1800.03
INFO: moovPosition 10812835.00
INFO: audiocodecid mp4a
INFO: aacaot 2.00
INFO: audiosamplerate 44100.00
INFO: audiochannels 2.00
INFO: trackinfo:
INFO: length 79381504.00
INFO: timescale 44100.00
INFO: language eng
INFO: sampledescription:
INFO: sampletype mp4a
1480.259 kB / 224.84 sec (12.4%)
Caught signal: 2, cleaning up, just a second...
1608.259 kB / 244.30 sec (13.5%)
Download may be incomplete (downloaded about 13.50%), try resuming
Terminate batch job (Y/N)?