lavfi/curves: fix a spacing weirdness.
lavfi/curves: make possible to customize presets.
lavfi/curves: introduce "all" field in presets and use it.
lavfi/buffersrc: update for compatibility with the fork.

Merge and adapt commit d28cb84 by Anton Khirnov.
fate: add tests for unknown channel layouts.
telecine filter

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavfi: remove double .priv_class initializers

Signed-off-by: Paul B Mahol <onemda@gmail.com>
lavfi: remove telecine libmpcodecs wrapper

Native, with more features, filter is available.

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Merge remote-tracking branch 'cigaes/master'

* cigaes/master:
  fate: add tests for unknown channel layouts.
  lavfi/buffersrc: update for compatibility with the fork.

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