metasound: Fix error message argument

Signed-off-by: Diego Biurrun <diego@biurrun.de>
avienc: drop the vfr flag.

AVI does not really support vfr properly, only by padding with null
packets.
Merge commit '5462dde1947e0ecfcb2db99ae29ce9dee8933b45'

* commit '5462dde1947e0ecfcb2db99ae29ce9dee8933b45':
  metasound: Fix error message argument

Merged-by: Michael Niedermayer <michaelni@gmx.at>
ffmpeg: treat avi as VFR in framerate conversion code

It can be debated if avi is vfr or cfr, it can be either depending
on the definition of vfr and cfr.
This commit ensures that avi is treated correctly independent of
the AVFMT_VARIABLE_FPS value.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  avienc: drop the vfr flag.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
avformat/h261dec: optimize probe

about 3 times faster

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/h261dec: dont accept invalid gobs in probe as valid

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