[mythtv-users] Re: nuv export speed

[Chris Petersen]

> I tried to walk through the code to see what it was doing, but I got a 
> little lost - it's very modularized but it's starting a dozen different 
> processes with a billion different command-line options.  (This is why 
> we really need nuvexport!!!)  It's using mythtranscode, which I presume 
> calls transcode... and I'm not sure if it's using ffmpeg or mpeg2enc.  
> ffmpeg on the web claims to be able to do real-time encoding.

nuvexport calls mythtranscode if you have true nuv files, to set up the 
raw a/v feed fifos.  From there, it either calls transcode 
(dvd/vcd/xvid/others) or ffmpeg (wmv/mp3)  (both of which can interact 
directly with mpeg-based files).  Transcode is also a wrapper of sorts, 
and makes its own calls to various encoders.

I have no idea why some people encode faster than others.  I do know 
that transcode processes mpeg->mpeg faster than nuv/raw->mpeg (so 
mpeg->vcd or mpeg->svcd).  But on that note, I just started a vcd export 
with no denoise (major slowdown) and am getting around 15fps on my 2.4G 
p4 (that's with mpeg4 nuv files)

-Chris