[mythtv-users] frustrating comments about sample rates (what not to do)

[Larry Symms]

In mpegrecorder.cpp it states "// only 48kHz works properly." regarding 
audio sample rates which I have tested and proven true.  What happens is 
a discrepancy in displayed time and actual position in the recording.  
This leads to skipping back when trying to skip forward because myth is 
miscalculating the current position based on time elapsed.  The problem 
is that the comments in Recording Profiles in TV Settings in Myth 
frontend say: "Sets the audio sampling rate for your DSP.  Ensure that 
you choose a sampling rate appropriate for your device.  btaudio may 
only allow 32000."  This implys that not only is it ok to change the 
sampling rate from the default but that it is recomended.  This is not 
the case.  Do not be deceived, 48000 is the only acceptable setting for 
mpeg encoders unless you never watch recordings while they're 
recording.  When playing recordings while they are recording the sample 
rate is gathered from the codec settings in the db rather than the mpeg 
header.  If any of this is incorrect by all means correct me but I'm 99% 
sure this is the case based on the code I've gone through and the tests 
I've conducted.