[mythtv] nuvexport incorrectly setting aspect ratio for dvb-t recordings

[James Fidell]

nuvexport appears to be using the following command to get the aspect
ratio for transcoding my dvb-t recordings:

  mplayer -v -v -v -v -nolirc -nojoystick -vo null -ao null -frames 0
-identify <filename>

With both the mplayer-1.0-60_r23482.el5 package from ATrpms and the
mplayer-1.0-0.80.20070715svn.lvn7 package from the livna repository
I end up with the default aspect ratio (4:3) because these always
report an aspect ratio of 0, eg:


  $ mplayer -v -v -v -v -nolirc -nojoystick -vo null -ao null -frames 0
-identify 3071_20070803075200.mpg | fgrep ID_VIDEO_ASPECT
ID_VIDEO_ASPECT=0.0000

This behaviour seems quite consistent across all 50-odd recordings I
currently have.

Changing the number of frames in the command line to 1 yields a
different result:

  $ mplayer -v -v -v -v -nolirc -nojoystick -vo null -ao null -frames 1
-identify 3071_20070803075200.mpg | fgrep ID_VIDEO_ASPECT
ID_VIDEO_ASPECT=0.0000
ID_VIDEO_ASPECT=1.7778


and nuvexport now correctly identifies such recordings as having a 16:9
aspect ratio.

I don't know if this is a valid fix, or applies only to dvb or dvb-t
recordings though.

James