The reason I tried to do this in the first place, was that Toast insisted on re-encoding my media.
What I found out the hard-way: if you try to burn to a DVD, Toast will no-matter-what re-encode media with high bit-rates (>15 Mbps).
However, if you try to burn to a blu-ray disc with Toast, then it will not re-encode your stuff (if you have “never reencode” selected) …
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Nikos Kanellopoulos
https://www.diafragma.gr