Progressive Networks protocol (PNM, also known as PNA)

PNA is a proprietary protocol used in earlier RealNetworks client software versions. PNA is supported in the current Helix Universal Server for compatibility with older RealNetworks clients (RealPlayer 5 and earlier). PNA uses TCP for player control messages, and UDP for audio data. PNA can also use TCP to deliver data, but this is not recommended.

The PNA protocol uses pnm:// rather than pna:// in the request URL.

PNM (Progressive Networks protocol) uses port 7070, this protocol allows for backward compatibility with a RealPlayer 5.0 and below client. PNM protocol allows access and server publishing when serving large or high-quality files. “HTTP is not quite as robust as PNM and HTTP is best suited for those serving smaller files or not insistent upon the absolute best sound quality.” This is what the company that designed this protocol and client claim I and many others have not been able to find a difference between the two PNM and HTTP protocols when it comes to streaming.

PNM Stream Player - RealPlayer

As PNM are proprietary to Real Networks, usually these file types have to be played through one of their players.

PNM Audio Recorder - Mini-stream Ripper

• Record live online radio streams like Windows Media, Real Audio, Winamp Shoutcast.
• Save streams as RM, MP3, WMA, WAV, OGG or FLAC audio files.
• Split songs by the duration automatically
• Free drag and drop features
  
• More Features...

PNM Ripper/Downloader/Capturer - RM Downloader

• Records both video and audio streams (Real Audio, Real Video, Real Media,: RA, RAM, RM and RMVB)
• Download live online radio streams like Winamp SHOUTcast, Icecast, and BBC Radio stations
• Split songs by file's size automatically
• More features...

How to download/save/capture/record/rip PNM streams

Mini-stream Ripper only captures audio streams. Rm Downloader Records both video and audio streams. Here we give an example of RM Downloader.

1. Open RM Downloader(RD)
2. Click on the Load button on RD's screen to open the URL Loading screen. In the "Load" box that opens, type in: "pnm://aural1.justconcerts.com/justconcerts/sessions/k-os/020730/bling_bling.rm". Then click 'ok', RD will load the stream for you.
   
3. If you want to record the stream which RealPlayer is playing, single click the "File" drop-down menu on the RealPlayer interface. Choose "View file info" under "Clip Properties", Copy "pnm://aural1.justconcerts.com/justconcerts/sessions/k-os/020730/bling_bling.rm" in the Clip Info Box. Paste the address "pnm://aural1.justconcerts.com/justconcerts/sessions/k-os/020730/bling_bling.rm" in the RD's loading url box. Then click 'ok', RD will load the stream for you.
4. If the stream has been sucessfully loaded, you'll get the message "Please press 'Start' to download the ready files". If not, you'll get an error message.
5. Click on the Start button on the right of RD's screen to start recording.