MasterBuilder, rok temu angielski I agree that if it is already AAC, it should not be changed as it has the highest fidelity and best compression. While AC-3 is not the best, it and AC-4 are the only formats i know that can encode TrueHD and Atmos metadata, so that should be kept it it is there. Any transcode will lose fidelity unless the target codec is lossless, and I don’t think AAC has a lossless mode.
I agree that if it is already AAC, it should not be changed as it has the highest fidelity and best compression.
While AC-3 is not the best, it and AC-4 are the only formats i know that can encode TrueHD and Atmos metadata, so that should be kept it it is there.
Any transcode will lose fidelity unless the target codec is lossless, and I don’t think AAC has a lossless mode.