Input formats vary according to whether audio or video is being encoded. RealAudio content may be created either from previously recorded digital audio files or from an external audio source. Use a sound-editing utility to convert unsupported formats to a supported format. However, you cannot use a mono input file to produce a stereo output file. Encoding RealProducer 7.0x supports AVI and QuickTime.
Uncompressed files offer the best results.
RealProducer supports any size image from any video source, but it will automatically crop the height and width to multiples of 4. Input files are also required to be in 24-bit RGB color mode. Encoding from a live source is supported with specific video capture cards. RealNetworks does not specifically recommend any one piece of third party software. However, there are several conversion products available which offer compatibility with RealProducer input formats.