I have more than 2 million images saved on server folder, they were in .tiff format but their extensions were renamed to .jpg , my database is oracle and images reference are saved as bfile in table, when i try to get that image with nodejs as buffer image on front-end and i convert them to base64 it show some grey image instead of real image, when i place original .jpg file it works fine how can i get that image in nodejs express api or is there any function that can convert that image to jpg in oracle ?