ac3enc: Change EXP_DIFF_THRESHOLD to 500.
This patch changes the exponent difference threshold in the exponentstrategy decision function of the AC-3 encoder. I tested lowering inincrements of 100. From 1000 down to 500 generally increased in qualitywith each step, but 400 was generally much worse....
Add stereo rematrixing support to the AC-3 encoders.This improves the audio quality significantly for stereo source with both thefixed-point and floating-point AC-3 encoders.Update acodec-ac3_fixed and seek-ac3_rm test references.
Originally committed as revision 26271 to svn://svn.ffmpeg.org/ffmpeg/trunk
Change the AC-3 encoder to use floating-point.Fixed-point AC-3 encoder renamed to ac3_fixed.Regression test acodec-ac3 renamed to acodec-ac3_fixed.Regression test lavf-rm changed to use ac3_fixed encoder.
Originally committed as revision 26209 to svn://svn.ffmpeg.org/ffmpeg/trunk