helix mobile producer on-demand user's guide - RealPlayer

Helix Mobile Producer On-Demand User’s GuideEncoder typeThe following table lists and describes the three video encoding formats thatHelix Mobile Producer On-Demand supports.Video Encoding FormatsFormat DescriptionMPEG-4 ISO/IEC video codecH.264 MPEG-4 AVC. International Telecommunications Union video codecH.263 International Telecommunications Union video codecRealVideo RealNetworks video codecRealVideo CodecsRealVideo 10 is the default RealVideo codec used with Helix Mobile ProducerOn-Demand, but you can also encode with older RealVideo codecs.RealNetworks recommends using RealVideo 10 unless you need fasterencoding performance during broadcasts, or you need to stream video toRealPlayer 8.RealVideo 10 CodecThe RealVideo 10 codec creates the highest quality compressed video possible.It offers improved visual quality over RealVideo 9 and RealVideo 8, especiallywith fast-action scenes and on-screen text. Because RealVideo 10 performsmore complex analysis of video data than earlier codecs, encoding may takemore than twice the time required with RealVideo 9. To help shorten theencoding time and improve the quality, Helix Mobile Producer On-Demandprovides the following features:• RealVideo 10 is optimized for multiprocessor machines. Helix MobileProducer On-Demand uses a second processor when the video height isgreater than 180 pixels. When you encode a SureStream CBR clip formultiple audiences, Helix Mobile Producer On-Demand uses up to twoprocessors for each audience. For example, encoding a RealVideo clip for a56 Kbps modem audience and a 256 Kbps broadband audience can utilizeup to four processors.• When encoding pre-recorded clips, you can lower the codec complexitylevel. This reduces the clip's visual quality, but decreases the encodingtime.38