Index — Of Premiere Pro [updated]

Most editors ignore indices until something breaks. But understanding what they are can save you hours of frustration. In simple terms, an index is a temporary cache file (usually with a .cfa or .pek extension) that Premiere Pro creates to read your media faster.

Delete your media cache. Go to Edit > Preferences > Media Cache and hit Delete . Then restart Premiere. It will rebuild fresh indices. 3. "File Has an Unsupported Compression Type" Sometimes Premiere refuses to index a VFR (Variable Frame Rate) file — typically screen recordings from OBS, Zoom, or iPhones. No index means no smooth scrubbing. index of premiere pro

Have a Premiere Pro indexing horror story? Drop it in the comments. Most editors ignore indices until something breaks

If you’ve ever been deep into a Premiere Pro project and suddenly experienced choppy playback, frozen frames, or the dreaded "audio buzzing but video lagging" scenario, you’ve likely encountered a corrupted or missing index file . Delete your media cache

Use HandBrake or Shutter Encoder to convert the clip to Constant Frame Rate (CFR) before importing. Premiere can index CFR files perfectly. Best Practices to Keep Your Index Healthy ✅ Do this every 2-3 weeks: Edit > Preferences > Media Cache > Delete — also check "Delete unused media cache files" (anything older than 30 days is safe).

Convert your footage to an edit-friendly codec like ProRes or DNxHD before importing. Indexing ProRes takes seconds. 2. Choppy Playback on Seemingly Simple Clips This happens when the video index ( .cfa ) is out of sync with the actual file. Maybe you renamed a clip outside of Premiere, or the file became slightly corrupted.