Following our latest review of the features of Wowza Media Server, let’s now look at how to transcode video streams using this plugin. This feature is helpful when you only have a single source of high quality video and you would like to deliver the video to multiple devices. Yet another example is video stream failback to audio only in an iOS application (AppStore’s requirement), where you need an additional stream with cut-off video. A typical approach to this problem requires a transcoder (you can also generate an audio only stream using the new Adobe Media Server 5.0). Usually, a transcoder is a separate server optimized for video handling. Wowza offers an alternative: transcoding at the media server level. Let’s look at how it works in more detail.
Wowza Transcoder is a paid addon to the Wowza Media Server. It can transcode incoming video to H.264 (MPEG-4) streams tailored for different viewing devices. To run a transcoder, please install a 64-bit version of Java. Wowza Media Server supports the hardware transcoder technologies: Intel Quick Sync hardware acceleration and Nvidia CUDA hardware acceleration.
See original here