Quote:
Originally Posted by tebasuna51
It is not exact. The standards showed in section 7.8 of .pdf related in ffmpeg docs are:
For a standard mix:
or for a DPL mix:
But ffmpeg do:
From a un-normalized mix of:
Is a standard mix (not DPL) but ignoring the 'clev' and 'slev' parameters included in AC3 headers.
clev can be:
0.707 (my recommendation when encode: -center_mixlev 0.707)
0.595 (the default when encode with ffmpeg)
0.500 (never recommended)
slev can be:
0.707 (not recommended)
0.500 (the default and recommended with ffmpeg)
My recommended un-normalizad mix standard is:
and normalized:
But for users than experiment low dialog volume we can modify the coeficients.
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Great info... thanks for the reply. I'll adjust my batch file command line settings.