2014-09-24, 15:16
Can't comments on all your cases, but the bcm2835 driver (both analog and hdmi) does not declare support for S24_LE. (S16_LE for hdmi, U8 & S16_LE for pwm analog). So in those cases libav is downconverting it. The only case that isn't clear at the moment is what libav does with 16 and 24 bit data when presented with an S32_LE (only) device. Presumably it will upconvert it, but whether that will exhibit the noise problem is unknown (until boberze or someone with a dac runs tests).
(Jeez it's been YEARS since I last dug into this stuff - Does mplayer use libav?)
(Jeez it's been YEARS since I last dug into this stuff - Does mplayer use libav?)
