Quote:
Originally Posted by Fiffy
The libav E-AC3 codec does support 7.1, so that is not the problem. The concern is whether the decoder (which is still quite new) works correctly. Apparently it produces different output than the Nero codec (which is Dolby certified). Also take a look at this thread:
http://forum.doom9.org/showthread.php?t=145636 |
Both AC3 and E-AC3 use random noise as part of the decoding process. From the tests I have done so far, the difference between the output of libavcodec and Nero is approx. the same as the difference between using 2 different types of random number generators in the libavcodec decoder. The type of RNG used is not defined in the specification. It even says that the level of the noise, which should be 0.707, can be approximated to 0.5 and still be compliant.