Table of Contents
Advertisement
•
If necessary, reduce the frame size. Generally, it's best to specify a multiple of the full screen size, taking into
account the pixel aspect ratio. For example, if the full screen size is 640 x 480 (square pixels), then try 320 x 240.
•
If necessary, lower the frame rate. For example, full frame rate is approximately 30 fps (in NTSC); reducing the
frame rate to 15 fps should reduce the data rate significantly without making the motion appear too choppy.
•
If permitted by the codec, adjust the data rate and quality settings according to your output goal. For example,
codecs like Cinepak and Sorenson let you adjust the amount of compression by specifying a quality or target data
rate.
•
If necessary, lower the color depth. This is particularly effective if the source video contains less than the full range
of colors (known as 24-bit color, Millions of Colors, or True Color), or if the video will be shown using a monitor
or software that displays a limited range of colors.
•
Test the file by playing it on a system comparable to the least-capable system in your intended audience, and make
adjustments accordingly.
Note: Because the midrange brightness, or gamma, of Mac OS and Windows differ, it's common to strike a balance
between the two when adjusting the gamma of cross-platform movies.
Note: Applying a noise reduction filter can improve the appearance of video compressed with certain codecs, such as
Cinepak. (See "Adobe Media Encoder Filters options" on page 390.)
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 the proper software and a CD recorder; a DVD
recorder isn't required. On the other hand, VCD quality is comparable to VHS—much lower than DVD quality. You
can create Video CD files using MPEG1-VCD presets in the Adobe Media Encoder and then write the files to a
recordable CD using a program that can create a VCD. However, because DVD media, recorders, and players are
widespread and affordable, the demand and support for the VCD format is not as great as it was initially.
Creating video files for the web
In contrast to broadcast media or format-based delivery media such as DVD or videotape, the web accommodates
a wider variety of video and audio standards and devices. While a growing number of viewers have a broadband
Internet connection that can support relatively high-quality content, others may use equipment that supports only
low data rates and, therefore, lower-quality content. For this reason, it's often necessary to export your project in a
variety of formats, each tailored to different audience's viewing capabilities. The process is analogous to exporting to
various physical media types, such as VHS and DVD, except that the choices are more varied.
The Adobe Premiere Pro and Adobe After Effects export settings contain presets for many bandwidth scenarios so
that you can more easily match your output files with the viewing capabilities of your audience.
See also
"About the Adobe Media Encoder" on page 385
Understanding video file formats
Video file formats are developed to acquire, deliver, and distribute digital video and audio effectively. While more
established formats, such as standard-definition video and DV encoded files, are familiar to most content creators,
other formats are still emerging or include numerous variants. You should familiarize yourself with the specifications
and requirements of any format to which you want to export your projects.
ADOBE PREMIERE PRO 2.0
372
User Guide
Hide quick links:
Advertisement
Table of Contents
