Learn about Premiere Pro support for growing files.

Premiere Pro supports growing files for those needing this workflow. Growing files are files that are still being written to disk and will grow in duration after they are ingested. These files automatically refresh their duration based on a preference you can set in Premiere Pro.

Supported codecs for growing files within an MXF wrapper

  • AVC-Intra Class 50/100
  • IMX 30/40/50 
  • XDCAM HD 50/35/25/18 RDD9 (The low latency version of XDCAM HD is not supported)
  • OP1B files

Support for growing files to automatically refresh, and how often they must refresh, is available in Media Preferences. The updated duration can be viewed in the Project panel and the Source Monitor. The refreshed duration is also available for editing in the Timeline. See Media Preferences for more details.

Growing files can only be imported if Premiere Pro can read the volume where they are stored. Premiere Pro can read footage from an unc path("//somewhere/something"), but the drive must be mapped("H:\somewhere\something"). The file can then be imported using the File > Import command. You can then edit with these clips as you would normally edit any other clip.  

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