--------------------------------
To encode:  Baseball Tonight:  Untitled
Use the following commands:

system call:
mkdir -m 0755 /tmp/fifodir_32380/

forking:
/bin/nice -n19 /usr/local/bin/mythtranscode --showprogress -p autodetect -c 1024 -s 2007-06-05-10-20-00 -f "/tmp/fifodir_32380/" --honorcutlist 2>&1

forking:
/bin/nice -n19 ffmpeg -f rawvideo -s 720x480 -r 29.970 -i /tmp/fifodir_32380/vidout -f yuv4mpegpipe - 2> /dev/null | /bin/nice -n19 yuvdenoise 2> /dev/null | /bin/nice -n19 ffmpeg -y -f s16le -ar 48000 -ac 2 -i /tmp/fifodir_32380/audout -f yuv4mpegpipe -s 720x480 -aspect 1.33333333333333 -r 29.970 -i - -aspect 1.33333333333333 -r 29.970 -deinterlace -croptop    6 -cropright 10 -cropbottom 6 -cropleft  10 -padleft 2 -padright 2 -s 620x464  -vcodec mpeg4 -b 960 -lumi_mask 0.05 -dark_mask 0.02 -scplx_mask 0.5 -mv4 -part -vtag divx -acodec mp3 -ab 128 -f avi '/video/export/Baseball Tonight.2.avi' 2>&1

Cleaning up temp files.
[mythtv@localhost /]$ mkdir -m 0755 /tmp/fifodir_32380/
[mythtv@localhost /]$ /bin/nice -n19 /usr/local/bin/mythtranscode --showprogress -p autodetect -c 1024 -s 2007-06-05-10-20-00 -f "/tmp/fifodir_32380/" --honorcutlist 2>&1
2007-06-05 10:50:03.547 Using runtime prefix = /usr/local
2007-06-05 10:50:03.575 New DB connection, total: 1
2007-06-05 10:50:03.583 Enabled verbose msgs: important
2007-06-05 10:50:03.586 New DB connection, total: 2
2007-06-05 10:50:03.623 Using protocol version 34
0: start_time: 0.036 duration: 107.534
1: start_time: 0.017 duration: 107.523
stream: start_time: 0.189 duration: 1195.038 bitrate=5179 kb/s

2007-06-05 10:50:36.979 Processed: 24 of 35835 frames(0 seconds)

----
in another shell - the output of the second fork of the command: 

/bin/nice -n19 ffmpeg -f rawvideo -s 720x480 -r 29.970 -i /tmp/fifodir_32380/vidout -f yuv4mpegpipe - 2> /dev/null | /bin/nice -n19 yuvdenoise 2> /dev/null | /bin/nice -n19 ffmpeg -y -f s16le -ar 48000 -ac 2 -i /tmp/fifodir_32380/audout -f yuv4mpegpipe -s 720x480 -aspect 1.33333333333333 -r 29.970 -i - -aspect 1.33333333333333 -r 29.970 -deinterlace -croptop    6 -cropright 10 -cropbottom 6 -cropleft  10 -padleft 2 -padright 2 -s 620x464  -vcodec mpeg4 -b 960 -lumi_mask 0.05 -dark_mask 0.02 -scplx_mask 0.5 -mv4 -part -vtag divx -acodec mp3 -ab 128 -f avi '/video/export/Baseball Tonight.2.avi' 2>&1
FFmpeg version SVN-r8743, Copyright (c) 2000-2007 Fabrice Bellard, et al.
  configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib --mandir=/usr/share/man --enable-shared --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-x11grab --enable-dc1394 --enable-liba52bin --enable-libdts --enable-libfaac --enable-libfaadbin --enable-libmp3lame --enable-libogg --enable-libtheora --enable-libvorbis --enable-xvid --extra-cflags=-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables --disable-strip
  libavutil version: 49.4.0
  libavcodec version: 51.40.3
  libavformat version: 51.12.1
  built on Apr 23 2007 23:45:21, gcc: 4.1.1 20070105 (Red Hat 4.1.1-51)
Input #0, s16le, from '/tmp/fifodir_32380/audout':
  Duration: N/A, bitrate: N/A
  Stream #0.0: Audio: pcm_s16le, 48000 Hz, stereo, 1536 kb/s
Input #1, yuv4mpegpipe, from 'pipe:':
  Duration: N/A, bitrate: N/A
  Stream #1.0: Video: rawvideo, yuv420p, 720x480, 29.97 fps(r)
Output #0, avi, to '/video/export/Baseball Tonight.2.avi':
  Stream #0.0: Video: mpeg4, yuv420p, 624x464, q=2-31, 0 kb/s, 29.97 fps(c)
  Stream #0.1: Audio: mp3, 48000 Hz, stereo, 0 kb/s
Stream mapping:
  Stream #1.0 -> #0.0
  Stream #0.0 -> #0.1
frame=   62 fps= 14 q=31.0 Lsize=     180kB time=2.1 bitrate= 714.2kbits/s
video:130kB audio:37kB global headers:0kB muxing overhead 8.085206%