[FFmpeg-user] Verifying lossless rewrapping/transcoding in one step?

Hi everyone :) I was wondering if maybe there's a quicker way to verify lossless transcoding or container rewrapping than these 3 steps:   1. generate content hash during transcoding.   2. generate content hash of output file.   3. diff source-hash with output-hash (using whatever diff-tool). I'm doing this in bash scripts, but I'm wondering if it would be possible to tell ffmpeg something like this: "Please generate the output and compare source and target's content hash and only return exit code 0 if they match" Is that already implemented, or would it be possible to do that? Thank you very much in advance, Peter B.