lots of these errors:

Error while decoding frame!
[svq3 @ 00970AC0]top block unavailable for requested intra mode at 0 0
[svq3 @ 00970AC0]check_intra_pred_mode = -1
[svq3 @ 00970AC0]error while decoding MB 0 0

see http://roundup.mplayerhq.hu/roundup/ffmpeg/issue405