justdan96
Question about extracting TrueHD audio
Hi,
I noticed a note the main page: "please note TrueHD must have the AC3 core intact" Can you please explain what it means? How can I know if the TrueHD track on a Bluray has AC3 core? Thank you
Hi @efraim-il , all Blu-rays have interleaved AC-3/TrueHD frames -pure TrueHD (without ac3 frames) is not compatible with Blu-ray. So when you extract the TrueHD track from a Blu-ray with tsMuxer, it always has interleaved AC-3 frames.
Also while ac3 is not used to decode TrueHD, like in DTS MA, it is used to decode EAC3, if it is present.
"E-AC3 on Blu-ray is not a full E-AC3 stream. It uses an ordinary 5.1 AC3 stream and a second E-AC3 extension stream that contains 4 channels which are supposed to replace the back channel from the AC3 5.1, and add two more channel for a 7.1 mix."
@jcdr428, @ValZapod should we look at updating the documentation? It seems like we get questions similar to this quite a bit.
should we look at updating the documentation
It is on wikipedia, LOL. I wrote it there, people who really wanted to know would have just visited it. BTW, what do you know about gap processing of truehd on segment boundaries? See this http://rationalqm.us/board/viewtopic.php?f=16&t=793&p=11193&hilit=Tsmuxer#p11193critics: