[FFmpeg-user] auto-selects wrong frame rate

[Roger Pack]

Hello.
I noticed that if I specify -r 7 to mpeg2video, I get the following
error message:
..
MPEG1/2 does not support 5/1 fps

It's fine to auto-correct, but it appears to be autocorrecting to
something not expected?
Thanks.
-r



c:\vids>ffmpeg -i sintel.mpg -vcodec mpeg2video -acodec copy -r 7 sintel.r5.mpg
ffmpeg version N-43332-gb615dbb Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug  8 2012 15:27:50 with gcc 4.7.1 (GCC)
  configuration: --enable-memalign-hack --arch=x86 --enable-gpl
--enable-libx264 --enable-avisynth --target-os=mingw32
--cross-prefix=/home/rogerdpack/dev/ffmpeg-windows-build-helpers/builds/mingw-w64-i686/bin/i686-w64-mingw32-
--pkg-config=pkg-config --enable-libmp3lame --enable-version3
--enable-libvo-aacenc --enable-libvpx --extra-libs=-lws2_32
--extra-libs=-lpthread --enable-zlib --extra-libs=-lwinmm
--extra-libs=-lgdi32 --enable-runtime-cpudetect
  libavutil      51. 67.100 / 51. 67.100
  libavcodec     54. 51.100 / 54. 51.100
  libavformat    54. 22.101 / 54. 22.101
  libavdevice    54.  2.100 / 54.  2.100
  libavfilter     3.  6.100 /  3.  6.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
[mpeg2video @ 003FF6C0] ac-tex damaged at 40 7
[mpeg2video @ 003FF6C0] Warning MVs not available
[mpeg2video @ 003FF6C0] concealing 1035 DC, 1035 AC, 1035 MV errors in I frame
[mpeg @ 03081800] max_analyze_duration 5000000 reached at 5024000
Input #0, mpeg, from 'sintel.mpg':
  Duration: 00:14:47.58, start: 0.233367, bitrate: 4132 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x480
[SAR 32:27 DAR 16:9], 7000 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94
tbc
    Stream #0:1[0x80]: Audio: ac3, 48000 Hz, 5.1(side), s16, 448 kb/s
File 'sintel.r5.mpg' already exists. Overwrite ? [y/N] y
MPEG1/2 does not support 5/1 fps