[mythtv] Question/request: mythtranscode resampled output

[Joseph A. Caputo]

Chris Petersen wrote:

>> Anyway, I 
>>suppose I could try piping the raw audio through sox to resample.
> 
> 
> If you tell me how to do this, I'm more than happy to hook it up to
> nuvexport.  I just haven't had time (and not much incentive,
> unfortunately) to research it and figure out how to do it myself.
> 
> -Chris

Yeah, I just tested running sox on the raw mythtranscode output... seems 
to work OK.  Haven't tested how it would work in the nuvexport pipeline, 
but I think you know I'm interested in resampling for the SVCD 
conversion... not sure tcmplex (or maybe it's toolame?) likes 32000 Hz. 
  I always get no sound in my MPEG-2 SVCD files made with nuvexport, and 
it's been suggested that they need to be 44100 Hz (or was it 48000?). 
Anyway, the command I used was 'sox -t raw -r 32000 -s -w -c 2 
fifodir/audout -r 44100 out.wav'.   We can't use format auto-detection 
since there's no file header in the FIFO output from mythtranscode, so 
this forces sox to assume raw (-t raw) Signed (-s) 16-bit (-w) 2-channel 
stereo (-c 2) sound @ 32000 Hz (-r 32000) and convert it to WAV format 
(autodetected by filename) @ 44100 Hz (-r 44100).  Probably want to pull 
the source sample rate from nuvinfo, and have the output sample rate be 
a user option.  Also, I'm not sure what output format would be best... 
this will be piped to toolame, presumably, so maybe we just want to 
output resample raw instead of converting to WAV. The sox man page is 
pretty helpful.  If I have some time maybe I'll try to rig it up myself, 
but I haven't really bothered to learn Perl yet.

-JAC