title: HTML5 Video OGV conversion on Mac
body: <p>When I try recording a screencast with Quicktime or Screenflow and then converting to .ogv for use on the web, I get this error many times:</p>
  
  <pre><code>$ ffmpeg2theora test.mov
  [audioresample @ 0x7fa903800ee0] Audio sample format conversion failed
  </code></pre>
  
  <p>The resulting <code>test.ogv</code> file does not play in VLC. I can use <code>ffmpeg</code> to successfully convert mov to mp4. Are there only certain audio types that <code>ffmpeg2theora</code> supports? ffmpeg2theora version 0.29</p>
  
  <p>More output:</p>
  
  <pre><code>Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mov':
    Metadata:
      major_brand     : qt  
      minor_version   : 537199360
      compatible_brands: qt  
      creation_time   : 2013-08-26 20:50:37
    Duration: 00:00:07.00, start: 0.000000, bitrate: 1458 kb/s
      Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 90 kb/s
      Metadata:
        creation_time   : 2013-08-26 20:50:37
        handler_name    : Apple Alias Data Handler
      Stream #0:1(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1200, 1362 kb/s, 30 fps, 30 tbr, 3k tbn, 6k tbc
      Metadata:
        creation_time   : 2013-08-26 20:50:37
        handler_name    : Apple Alias Data Handler
  </code></pre>