[FFmpeg-user] Question about conversion (Transcoding)

[JD]

I have an mpeg2 file which I am trying to convert to a dvd iso.

I am using dvdauthor to do it.
dvdauthor says the file is not mpeg2 video compatible.

When I run ffprobe on the file, I get this

ffprobe /usr/tmp/title_3-09h31m23s.mpg
ffprobe version N-51556-ge278500 Copyright (c) 2007-2013 the FFmpeg 
developers
   built on Apr  4 2013 05:11:43 with gcc 4.6 (Debian 4.6.3-1)
   configuration: --prefix=/root/ffmpeg-static/32bit --arch=x86_32 
--extra-cflags='-m32 -I/root/ffmpeg-static/32bit/include -static' 
--extra-ldflags='-m32 -L/root/ffmpeg-static/32bit/lib -static' 
--extra-libs='-lxml2 -lexpat -lfreetype' --enable-static 
--disable-shared --disable-ffserver --disable-doc --enable-bzlib 
--enable-zlib --enable-postproc --enable-runtime-cpudetect 
--enable-libx264 --enable-gpl --enable-libtheora --enable-libvorbis 
--enable-libmp3lame --enable-gray --enable-libass --enable-libfreetype 
--enable-libopenjpeg --enable-libspeex --enable-libvo-aacenc 
--enable-libvo-amrwbenc --enable-version3 --enable-libvpx
   libavutil      52. 24.100 / 52. 24.100
   libavcodec     55.  2.100 / 55.  2.100
   libavformat    55.  1.100 / 55.  1.100
   libavdevice    55.  0.100 / 55.  0.100
   libavfilter     3. 49.100 /  3. 49.100
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
[mpeg @ 0xab1d7c0] max_analyze_duration 5000000 reached at 5024000 
microseconds
[mpeg @ 0xab1d7c0] Could not find codec parameters for stream 1 (Audio: 
ac3, 0 channels): unspecified sample format
Consider increasing the value for the 'analyzeduration' and 'probesize' 
options
[NULL @ 0xab1e760] start time is not set in estimate_timings_from_pts
Input #0, mpeg, from '/usr/tmp/title_3-09h31m23s.mpg':
   Duration: 02:10:42.11, start: 45337.301611, bitrate: 5391 kb/s
     Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x480 [SAR 
32:27 DAR 16:9], 29.97 fps, 59.92 tbr, 90k tbn, 59.94 tbc
     Stream #0:1[0x20]: Audio: ac3, 0 channels
     Stream #0:2[0x80]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s


So, how do I convert this file to a DVD compatible mpeg2 file?