I was working on a project and needed to combine a Real Player clip together with a Windows Media Player clip into a new WMV file. I was able to use the following software (all free to download and use) to tackle each part.
1) To convert Real Player video to AVI format:
Real7ime Converter (R7C) by Dessloch/[uCF]
Real7ime Converter (R7C) is a converter of any RealPlayer(tm) streaming
medias (video and sound) to AVI/WAV/MP3 format. It is a realtime
converter because it does not manage Real Time Streaming Protocol(tm)
(RTSP) directly so the needed time to convert a media will be greater
or equal to the time of the media.
2) To convert from WMV format to AVI format:
(VirtualDub no longer will import WMV format files, due to Microsoft’s patents on the format)
Convert WMV and AVI files, and change the frames-per-second rate, frame size, and compression codec of the video stream, sampling depth, frequency, and the number of channels of audio streams. Stoik Video Converter also detects scene changes and splits video into episodes. It exports scene clips or scene-separated projects for Stoik’s VideoMan.
3) To join two AVI files together:
What is VirtualDub?
VirtualDub is a video capture/processing utility for 32-bit Windows platforms (95/98/ME/NT4/2000/XP), licensed under the GNU General Public License (GPL). It lacks the editing power of a general-purpose editor such as Adobe Premiere, but is streamlined for fast linear operations over video. It has batch-processing capabilities for processing large numbers of files and can be extended with third-party video filters. VirtualDub is mainly geared toward processing AVI files, although it can read (not write) MPEG-1 and also handle sets of BMP images.
4) Encode the AVI file into .wmv format:
Windows Media Encoder 9 Series is a powerful tool for content producers who want to take advantage of the many innovations in Windows Media 9 Series including high-quality multichannel sound, high-definition video quality, new support for mixed-mode voice and music content, and more.