Adobe Premiere Pro CS4 - Manual (Page 101)

95 USING ADOBE PREMIERE PRO CS4
Capturing, digitizing, transferring, and importing
Last updated 11/6/2011
• Premiere Pro does conform audio in uncompressed formats that were not recorded in a natively supported sample
rate. In most of these cases, it will upsample the audio either to the nearest supported sample rate, or to a supported
sample rate that is an even multiple of the source audio sample rate. For example, it will upsample an 11024Hz
source to 11025Hz, since that is the nearest supported rate, and there is no supported rate that is an even multiple
of 11024.
Compressed audio
• Premiere Pro does conform all compressed audio, such as audio found in mp3, WMA, MPEG, or compressed MOV
files. It conforms this audio at the sample rate of its source file. For example it will conform a 44100Hz mp3 file at
44100Hz. However, if the conformed audio is used in a sequence with a non-matching sampling rate, as when a
44100Hz clip is used in a 44000Hz sequence, the audio will play back at the sample rate of the sequence without
further conforming.
Premiere Pro does not conform a file that was conformed in one sequence when you import it into another sequence
with the same audio sample rate, so long as you haven’t moved or renamed the file since it was conformed. Premiere
Pro keeps the location of the conform files for all files it has conformed in the Media Cache Database.
To avoid conforming, use audio editing software, or transcoding software, to convert your files to natively-supported
uncompressed formats at the supported sampling rates.
In addition to conforming some files, Premiere Pro also creates a PEK file for any file containing audio when it is first
imported into a project. It uses these PEK files for drawing the audio waveforms in Timelines. Premiere Pro stores PEK
files in the location specified for Media Cache Files through the Media pane of the Preferences dialog box.
Importing sequences, clip lists, libraries, and
compositions
Importing clips from OnLocation
1 (Optional) If you captured the clips with OnLocation on a machine other than the one running Premiere Pro, copy
the clips to the machine running Premiere Pro.
2 In the Media Browser panel, browse to the folder containing the clips from OnLocation.
3 Select the clips you want to import.
4 Do one of the following:
• Select File > Import From Browser,
• In the Media Browser, right-click any of the selected clips. Select Import.
• Drag the clips from the Media Browser and drop them into the Project panel.
Premiere Pro imports the selected clips into the Project panel.
Importing earlier Premiere Pro projects
You can add the contents of a project made with Premiere Pro CS3 on either Mac OS or Windows. In addition, on
Windows, you can import a project made with earlier versions of Premiere Pro, or Premiere 6.0 or 6.5. The imported
project’s clips and sequences are added to the Project panel in a bin named after the imported project. The bin
hierarchy of the imported project is maintained within its new bin. Discontinued transitions and effects are not
maintained. Use caution when importing a project into another project with a different timebase or audio sample rate,
because these differences may affect edit positioning and audio quality.