correct_truehd_channels() probes the first DECRYPTED access units of the
chosen title (TrueHD PIDs, bounded 8 MiB read of the first extent) and
sets AudioStream.channels from the MLP major sync — fixing the MPLS
audio_format understatement (5.1 declared on a 7.1/Atmos TrueHD track).
Regenerates the basic codec label for the corrected count; richer
editorial labels are left untouched. Wired in resolve.rs input() for
iso:// after decrypt_with (the m2ts is only decryptable post-key), using
a fresh reader so the mux reader is undisturbed. generate_audio_label
made pub(crate).
MattJackson
b34af1fa74