If people don't mind, then I'll post my Cam4 Downloader here as well, as this thread is the first result in Google when searching for how to record from Cam4.
Personally I was using the commercial Replay Media Catcher, but found out that with many videos the audio is out of sync, so I made my own Cam4 Downloader (basically a simplified version of RMC) that automatically sniffs out the rtmp url, extracts the title from your browser and downloads with librtmp.
WinPcap and at least .NET Framework 2.0 need to be installed. This tool was my made for myself and has so far only been used by myself, so I'm sure there still might be some bugs.
Note: You must start recording first and then load the Cam4 webpage/webcam or it won't detect the stream.
Supported browsers (to extract the title from):
Firefox
Chrome
Internet Explorer
Maxthon
When using an other browser a GUID will be returned as filename, for example "5A29D2E8-B9E6-4E15-BD39-6990461C4B44".
There's an "Audio" column that will tell you right away if there's an audio stream. If the broadcaster has audio turned on and you don't start the download when the broadcaster is making sound, then it can't detect an audio stream. In that case you must Cancel/Delete the download and reload the webpage until it contains an audio stream or the entire video won't have audio.
Make sure you put the application on a place where you have write permission. Streams will automatically be downloaded to a sub-folder named "Downloads". The download folder currently can't be changed in this version.
Please only use this tool for your own personal pleasure. Do not post the recorded streams on other websites.
https://rapidshare.com/files/2098091...Downloader.zip