I always thought consensus was that Compressor couldn’t be used to properly convert 29.97 to 23.976, and Cinema Tools would have to be used to change the speed and a workaround done to preserve the audio. Can Compressor be used to properly convert clips at 1080p29.97 to 1080p23.76 and preserve the audio using this method that you outline? Why doesn’t this come up as a suggestion more?
“It is quite easy to “Reverse Telecine” a 29.97 clip with Compressor.
Just turn Frame Controls “On” and choose “Reverse Telecine” under the Deinterlace option. Make sure the “Set Duration to:” is 100%.
You’ll then have your film at 23.98 fps if it was telecined correctly.”