Finally I reinstalled these new codecs and this time, a video (which previously had dificulties to be read) crashed the dsp directly several times, after a few crashes the dsp didn't recovered:

[ 994.612854] ***** DSPMMU FAULT ***** IRQStatus 0x2
...
[ 994.910766] proc_stop: Can't stop device, active nodes = 1

killall mafw-dbus-wrapper doesn't resolve the issue.
My question is: When this happen, is there a way to reinitialise the dsp without rebooting ?