test file: DM_Artifacts_4798404.flv
(1st 1MB of a dailymotion.com FLV file)

ffmpeg: SVN, r10261

ffplay_g -stats DM_Artifacts_4798404.flv

Input #0, flv, from 'DM_Artifacts_4798404.flv':
  Duration: 00:04:15.7, start: 0.000000, bitrate: 96 kb/s
  Stream #0.0: Video: flv, yuv420p, 320x240, 25.00 fps(r)
  Stream #0.1: Audio: mp3, 44100 Hz, stereo, 96 kb/s
  
BUG: observe visual artifacts in the bottom half of the video.