$ ffmpeg -i *.jpg.roto.png -sameq test.aviffmpeg version 0.8.4-6:0.8.4-0ubuntu0.12.10.1+codecs1, Copyright (c) 2000-2012 the Libav developers
  built on Nov 12 2012 22:28:17 with gcc 4.7.2
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[image2 @ 0x9fb7b80] Could not find codec parameters (Video: png, 1440x1080)
00000001.jpg.roto.png: could not find codec parameters