Premiere Pro attempts to play back all sequences, clips, effects, transitions, titles, and any other unrendered elements in real time without first rendering them.
However, it's sometimes necessary to render media files, especially VFX-heavy sequences, to enable smooth playback. Also, rendering any unrendered media elements of the Timeline reduces the dependence on the available system resources.
The Render and Replace feature in Premiere Pro lets you flatten video clips and After Effects compositions, speeding up the performance of VFX-heavy sequences. At any point, you can revert to the original clip using the Restore Unrendered feature.
Render and replace media in a sequence
Open the sequence containing the media to render in a Timeline panel.
With a Timeline panel active, select Clip > Render And Replace.
In the Render And Replace dialog, you can choose the format and settings based on which the sequence is rendered.
Source
Match the settings of the rendered media with the sequence settings, individual clip settings, or presets.
Format
Select a file format that gives the best quality playback while keeping an optimal rendering time and file size.
You can choose from MXF OP1a files, MXF OP1a files in DNXHD format, or QuickTime format.
Preset
Uses the frame size, frame rate, field type, and pixel aspect ratio of the chosen preset and renders all clips to these settings.
When the sources cannot be matched, the clips are not rendered.
Destination
Specify the path to the save the rendered file. You can save the rendered file alongside the original media, or, click Browse to navigate to a location other than the default.
Include Handles
Specifies the number of additional frames to retain before the In point and after the Out point of each rendered clip. You can set a value from 0 to 100 frames.
For example, a value of 30 means that 30 frames are retained before the In point, and 30 frames are retained after the Out point. Handles function as extra frames that allow for additional minor adjustments to the edits in the new project.
Include Video Effects
Render any effects applied to the clip. Selecting this option further improves playback performance.
All non-intrinsic effects on clip can be rendered in the timeline.
Intrinsic Motion effects are rendered if Source is set to Sequence.
The following effects cannot be rendered:
Intrinsic Opacity and Time Remapping effects
Transition effects between clips
Audio effects
Click OK.
The rendered file is created in the selected destination.
Replace rendered clips with original media
After rendering and replacing a clip in your sequence, at any point you can revert to the original unrendered clip or After Effects composition.
Select the sequence containing the rendered clips in a Timeline and choose Clip > Restore Unrendered.
If changes are made to the original file while the rendered and replaced clips are being used, reverting to the original clips includes those changes.
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