Funny sample. DGIndexNV locks up, trying to open it to demux the audio. MKVToolnix-GUI ignores the stream; tsMuxeR GUI as well. PVAStrumento can't demux it.
TSPE 0.301 calls it: AC-3 (ATSC A/53B audio).
DGAVCIndex reports an interesting issue:
Code:
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Audio Detection Mismatch
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The audio type determined from reading the PAT/PMT program information (AC3)
does not match the detected audio (MPA). In many cases, this is caused by emulation
of audio headers (false detection) and the PAT/PMT type is the correct type.
Hit Yes to use the PAT/PMT type. Hit No to use the detected type. Hit Cancel to disable this stream.
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Sounds like there is in fact MPEG Audio in a stream multiplexed as if it was AC-3. But neither mode produces a sensible demultiplexed audio stream.