If you are looking for RTSP streaming media download software, this Download RTSP Stream will be your best choice, which can help you download RTSP files for free.
Download RTSP Stream enables you to download/record/capture/rip RTSP streaming media and output audio files in any popular format. It is extremely useful for you to download online music, online radio and other audio stream from Internet for free.
You can also use this Download RTSP Stream as a audio converter to convert audio files between almost all formats. Rich settings are also provided to meet all your needs.
For Window: 
Download free version 
Buy full version $28.00
For Mac OS: Download free version Buy full version $29.00
Features: The Major Functions of Download RTSP Stream A Internet radio downloader
This tool helps download audio stream from online radio stations, and saves in various audio formats. You can download Windows Media, Real Audio, Winamp Shoutcast and so on with this tool. Directly recording from your sound card ensures the best sound quality.
An all-in-one audio converter
You are allowed to input both general audio files like
WAV, RM, RA, RMVB, WMA, WMV, ASF, MP3, OGG, FLAC, etc. and streaming presentation files (playlist files) like PLS, M3U, RAM, RPM, SMI, SMIL, etc. Uncommon audio formats involving streaming script are supported as well, including ASX, WAX, WVX, WMX, RMJ and so on. You can easily convert all these files to WAV, MP3, WMA, RM, OGG, FLAC and other formats.
An audio file tags editor
Download RTSP Stream enables you to preserve and edit the tag information of audio files, like Artist, Title, Album, Comment, Year, etc.
A CD ripper
Just input your Audio CD, and it can batch rip all tracks to RM, WAV, WMA, OGG, FLAC, and other audio files. It's as easy as ABC.
A professional RealMedia downloader and converter
This tool features marvelous speed when processing Real Audio files. Since lots of RealMedia streaming adopt RTSP protocol, this tool is ideal for downloading RTSP stream, the converting speed from Real Audio to others is also unmatchable.
A handy audio tool
This tool possesses lots of thoughtful features, such as load a folder, batch process, skip existed files, variable converting speed, generate a new file when the output file exceeds your defined quota, and so on.
If you want to download online radio content, or if you have *.rmj, *.m3u, *.asx or other files that has quite small file size and contains streaming script on your computer, this Download RTSP Stream is the best tool to help you out. It can automatically parse script and acquire real URLs, download audio stream with unmatched speed, and output audio files in all popular formats. Have a try!
For Window: Download free version Buy full version $28.00
About M3U Playlist format
What is M3U playlist format? - basic knowledge.
How to rip M3U to MP3 to a usable format?
How to download M3U songs?
How to convert song from M3U to MP3?
How to convert M3U to Youtube?