title: How to choose between openH264 and x264 decoder
body: <p>I'm using the dev build from zeranoe.com which has OpenH264 and libx264 in it.
  How can i choose between these two Decoders to compare the decoding speed ?</p>
  
  <pre><code>avcodec_find_decoder(AVCodecID.AV_CODEC_ID_H264); 
  </code></pre>
  
  <p>only gives me the name "h264"
  but which decoder is it ?</p>
  
  <p>And tries to force a specific decoder failed, like:</p>
  
  <pre><code>codec = avcodec_find_decoder _by_name("x264");
  codec = avcodec_find_decoder _by_name("libx264");
  </code></pre>
  
  <p>Which other options i have to improve the decoding speed of avcodec_decode_video2 for highres (4k and higher) RTSP video streams ?</p>