User Guide

APPENDIX A
241
After you open an AVI file you may be notified that your video has very few
key frames. This is generally representative of tutorial videos captured with a
program that saves the video as a Run Length Encoded (RLE) stream with a
single key frame. Due to non-linear access requirements of Sound Forge XP,
this may result in difficulty with audio synchronization. It is recommended
that you save your file with more key frames and re-open it for better
performance during digital editing.
Here are a couple of other tips that can help when trying to synchronize the
audio and video:
• After assembling or editing the audio you wish to use with your video,
place markers during video playback to correspond to any major
synchronization points. You can locate a particular frame by dragging the
cursor along the audio provided the Video Preview window is open or the
Animate Video Strip option is enabled. After primary locations have been
located, double-click and drag your audio to these markers bringing up
corresponding dialogs for mixes, pastes, and crossfades.
• Features like Insert Silence, Clear/Delete, and Time Compress/Expand are
commonly used to tighten synchronization.Another useful trick is to create
a region representing the delta between a video frame and audio event.
Then you can enable the Lock Region Length option and drag the delta region
to a preceding silent section. Use the region as a template for adjusting the
audio stream length by either copying and pasting to insert time, or
deleting to remove time.
CRASH RECOVERY
If for some reason Sound Forge XP terminates improperly, all the opened and
unsaved sound files can be recovered excluding those opened in direct and
read-only modes. Unless a file is opened in direct or read-only modes, a
temporary file is created and any edits made are stored in this file. When an
improper termination of the program occurs, these temporary files remain on
your hard drive and can be reopened to recover any work done to the sound
files before crashing. Also, the original sound files will remain unchanged until
you save your work.