Merge commit 'f154ef1a'

* commit 'f154ef1a':
  avconv: send EOF to lavfi even if flushing the decoder fails
  avconv: get rid of pointless temporary variable.
  avconv: simplify transcode().
  avconv: cosmetics
  avconv: replace no_packet array in transcode() with a var in InputStream
  avconv: remove unused variable from InputFile.
  avconv: remove commented out cruft.
  avconv: maintain sync on lavfi outputs.

Conflicts:
	ffmpeg.c
	ffmpeg.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>