You can easily change frame rates and how audio channels are used.
How frame rate and audio channels are interpreted
Video clips are made up of a series of still frames that are displayed fast enough to give the appearance of continuous motion.
Audio channels are combined to produce a single sound mix. Most of the time you will have stereo, two-channel or mono, single-channel audio.
Change the way Premiere Pro interprets the frame rate for a clip by right-clicking it in the Project panel and choosing Modify > Interpret Footage. You can choose a different frame rate, which will change the playback speed and duration of the clip.
Change the way Premiere Pro interprets audio channels for a clip by right-clicking it in the Project panel and choosing Modify > Audio Channels. You can choose which audio channels are used, and how they will be added to sequences.
Change clip playback speed
You can change the duration or speed of a clip in a sequence.
To change the playback speed, or precisely adjust the duration of a clip in a sequence, right-click the clip and choose Speed/Duration.
In the Clip Speed/Duration dialog box, choose a new playback speed as a percentage, and choose a Time Interpolation option. This sets the way Premiere Pro renders the new playback speed:
- Frame Sampling gives the best playback performance but not the
smoothest playback.
- Frame Blending is better quality but takes more work for your
computer to play.
- Optical Flow is the highest quality. For this option to play back in real
time, your computer will need to pre-process the appearance of the video
at the new speed. Pre-processing is called rendering. If you see a red line
along the top of the Timeline panel, you will probably need to render the
sequence to preview that part of your sequence smoothly. This doesn’t
affect your final output, just your previews.
To render effects in your sequence, make sure the Timeline panel is active (with the blue outline) and choose Sequence > Render Effects In to Out.
In the Tools panel, click and hold your mouse button on the Ripple Edit tool to display the Rate Stretch tool. The Rate Stretch tool allows you to trim clips to change the playback speed — perfect for exactly filling a gap with a clip. Trim with the Rate Stretch tool by dragging the ends of clips, and the playback speed will change by exactly the amount needed to achieve the new playback duration.
Choose the Selection tool when you have finished working with the Rate Stretch tool.
Set audio level for multiple clips
There are two ways to change the volume of several clips at the same time. Both options work well: Audio Gain adjustment (useful for music clips), and the Essential Sound panel (useful for dialogue).
To change the volume for several clips at once in the Project panel, select the clips and choose Clip > Audio Options > Audio Gain. In the Audio Gain dialog box, choose Normalize All Peaks To, set a new volume (–18dB is popular for music), and click OK. The level of all the selected clips is adjusted automatically to match the volume you chose.
Use the Essential Sound panel to change the volume for multiple dialogue clips already edited into a sequence. Select the clips and choose the Dialogue option in the Essential Sound panel. In the Loudness section, click Auto-Match. The clips will all be adjusted automatically to an industry-standard volume for dialogue.
You can use the Audio Gain option in a sequence too. Select the clips you want to change and choose Clip > Audio Options > Audio Gain.
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