f you have a properly tuned post production workflow then the amount of times you’ll recompress an intermediate video is zero or once; the most common case is recompressing assets like intros, bumpers, motion graphics, and others once they make their way into a final program.
I wanted to do an informal test between Avid DNxHD, Apple ProRes HQ, and GoPro Cineform to see how they stacked up through 5 rounds of recompression. To illustrate the differences, I took my original test video into Adobe Photoshop, added the compressed video to the layer above, set the compressed video layer’s blend mode to difference, and applied an exposure adjustment layer with gamma correction set to 2.0 to more clearly see the differences. This comparison should casually highlight the generation loss inherent in ea