Synthetic media are video clips that Premiere generates automatically. They include bars and tone, straight black and color mattes, as well as transparent video clips which all can be very useful in video editing.
The new sync lock feature in Premiere Pro CS4 is a very useful tool that will maintain the relationship between clips in multiple tracks so that when you are editing you make changes to one clip, Premiere will keep your edits in place
Franklin McMahon talks about batch coding in Premiere Pro CS4 and getting the software to render video projects out to different file formats for different platforms.
Premiere Pro CS4 has made it easier to apply multiple effects to multiple clips, either by cutting and pasting attributes from one clip to another, or by creating an effects preset that can be applied to any clip with one step.
Rich Harrington talks about one his favorite new features in Premiere Pro CS4; the audio transcription options.
Adobe Media Encoder CS4 takes the place of several tools that users had to rely on for processing and compression.