Add Keyframes at Markers
Select this option to create keyframes only where markers
exist in the Timeline window. For this to work, markers must exist in the Timeline window
(see “Using markers” on page 123).
Add Keyframes at Edits
Select this option to create a keyframe at edit points in the
Timeline window.
Note: Some codecs do not provide control over keyframes. In such codecs, the above
options will not be available.
Using Help | Contents | Index Back 307
Adobe Premiere Pro Help Producing Final Video
Using Help | Contents | Index Back 307
About creating a video file for CD-ROM playback
When you create a video file to be played from a CD, you may need to specify export
settings that take into account the wide range of hardware that your audience might be
using, possibly including older single- or double-speed CD-ROM drives.
If your audience does use older CD-ROM drives, it becomes important to tune your
exported video file for a low data rate. You can limit the data rate of your program simply
by specifying it in Adobe Premiere Pro, but if the video file still does not play well on your
audience’s computers, you may also want to make the following adjustments:
•
Lower the data rate and quality as far as you can without losing too much picture
quality, if you specified a codec that lets you adjust data rate and quality.
•
Lower the frame rate as far as you can without making motion seem too jerky. Start at
15 fps.
•
Lower the color depth to 256 colors. In addition to lowering the data rate, this may
improve picture quality of video on a system or in presentation software that can
display only 256 colors (8-bit color).
•
Crop the picture for optimum viewing at a small size, reduce video noise to enhance
compression, or adjust gamma for the target monitor.
•
Choose a file type and codec appropriate for the target audience. For example, for a
cross-platform CD-ROM, you might specify a QuickTime codec. Choose a codec
designed for low data rates, such as Indeo, Cinepak, or Sorenson Video.
For details about compression, see “About file export settings” on page 309.
About creating a video file for Video CD playback
Video CD (VCD) is a format that allows video to be played back in computers or players
that support the Video CD standard. The advantage of Video CD is that it can be created
using a CD writer; a DVD writer or reader isn’t required. However, the quality is
comparable
to VHS—much lower than DVD quality. You can create Video CD files using MPEG-1 -
VCD
presets in the Adobe Media Encoder and then write the files to a CD using a CD writer.
About creating a video file for use in other software
Adobe Premiere Pro exports to many formats that are readable by other applications.
When preparing to export to a video file for use in other video-editing or special-effects
software, answer the following questions:
•
What file formats and compression methods does the other software import? This helps
determine which format you will use to export.
•
Will you be transferring across computer platforms? This may constrain the choice of file
formats and compression methods further. Consider using high-quality cross-platform
codecs such as QuickTime Motion JPEG A or B, or the Animation codec.
