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The following steps attempt to reverse engineer and modify DB blobs. They should be tested thoroughly on a non-production replica first.

Stop Tomcat/Fedora.

Find the Modeshape uuid for the MasterFile using its noid (eg 4q77fs77w)


Code Block
mysql -u mysql_user -h mysql_host -p fedora_db < masterfile.sql

Start Tomcat/Fedora.

Open the item in a web browser and recreate the thumbnail using the player's built-in function.