title: FFMPEG reports different (wrong) video resolution compared to how it actually plays
body: <p>Quick question, i have a movie, which was cut and rendered with Sony Vegas from its original format to a .wmv file. Here comes the tricky part, movie when played, either with <code>VLC</code> or <code>WMP</code>, has a resolution of 656x480 ... BUT when i run a <em>ffmpeg -i</em> on it, it says it has a resolution of <code>600x480</code> ....</p>
  
  <p>I took the time of actually capturing a frame and croping it with photoshop and its <code>656</code> and not <code>600</code> like ffmpeg its reporting, why would this could be happening? How could i fix the headers resolution? Would that have any impact on video re-rendering? As i said, VLC and WMP seems not to care about the incorrect headers and are playing it right, BUT, jwplayer seems to be using the header information, which i don't blame him, its correct to do that, but why the video headers could be wrong?</p>
  
  <pre><code>ffmpeg -i trailer.wmv
  </code></pre>
  
  <pre>Input #0, asf, from 'trailer.wmv':
  Duration: 00:01:04.93, start: 3.000000, bitrate: 2144 kb/s
  Stream #0.0: Audio: wmav2, 44100 Hz, mono, 32 kb/s
  Stream #0.1: Video: wmv3, yuv420p, 600x480 [PAR 59:54 DAR 295:216], 2065 kb/
  s, 25.00 tb(r)</pre>
  
  <p>And yeah, the <code>PAR/DAR</code> parameters are also wrong, but honestly, i don't understand that technical shit, usually watch video and make sure it look good, any feedback would be appreciated :P</p>
  
  <p>Is there a way to change the container information with ffmpeg so applications that actually do use the container information don't render video incorrectly?</p>