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Premiere Pro includes clip analysis tools that you can
use to evaluate a file in any supported format stored inside or
outside a project. For example, after producing a video clip to
be streamed from a web server, you can use clip analysis tools to determine
whether a clip you exported has an appropriate data rate for Internet distribution.
The Properties feature provides detailed information about any
clip. For video files, analyzed properties can include the file
size, number of video and audio tracks, duration, average frame
rate, audio sample rate, video data rate, and compression settings.
The Properties window will not show all these properties for every
clip. The data shown in the Properties window is determined by the
file format of the clip being examined.
You can also use the Properties feature to alert you to the presence
of any dropped frames in a clip you just captured. Use the data
rate graph to evaluate how well the output data rate matches the
requirements of your delivery medium. It charts each frame of a
video file to show you the render keyframe rate, the difference
between compression keyframes and differenced frames (frames that
exist between keyframes), and data rate levels at each frame. The
graph includes the following information:
- Data rate
- The line represents the average data rate.
- Sample size
- The red bars represent the sample size of each keyframed
frame.
- Differenced frames sample size
- The blue bars represent the sample size of the differenced
frames between compression keyframes.
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