There used to be an option for some of the HLS modes to replace the
128kbit/s audio with 320kbit/s audio. There is no longer any 320kbit/s
audio for tv, so the option is being withdrawn.
I would imagine that a similar technique could be used to replace the
96kbit/s audio in dvfxsd with 128kbit/s audio from one of the 50fps
modes such as dvfhd. As well as the higher bit rate, that would get rid
of the HE-AAC SBR extension.
I have quickly skimmed the v3.23 code. sub get_stream_data at line 6269
which formats calls to sub get_stream_data_cdn at line 6155 appears to
be relevant. I have not managed to find where it decides to download
video and audio separately for DASH.
Has anyone else looked at it?
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