Thanks for sharing the command lines.
A couple of recommendations:
- Do not use "-internal-bitdepth 8". It will make the quality worse for no real benefit.
- Make sure to use corresponding key-frame interval (I believe it would be "--kf-max-dist=120" in aomenc if you want to have at most 120 picture interval between access points).
Regarding what -qp to use to end up with similar quality, it is a bit difficult to guess since it can be quite sequence dependent. Is the sequence you are using available anywhere in uncompressed form? One approach is to start with a faster -speed-mode to get an indication of the bitrate a certain -qp value gives for a certain sequence, and then encode with a slower speed mode.
Perhaps around -qp 25 would be a good starting point for finding correspond quality and/or bitrate for this test case.
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