This reverts commit c2e4f7c6.

Similar approach as video encoding does, helps for example with faad
module that in some cases only gets proper audio properties on decoding.

Ref #9022,#6298

It's used only to calculate timestamps if block needs to be divided into
multiple frames and not in overall timestamp keeping.

Index could be post keyframe type !

dvbpsi own debug messages are not needed to debug VLC modules

This value is documented as '/*!< No messages */'

marked as LEGACY in POSIX.1-2001.
POSIX.1-2008 removes the  specifications  of  index()
and rindex(), recommending strchr(3) and strrchr(3) instead.

We only need it as a dependency of another library (fluidsynth)

contrib: added target for libffi since it is required to compile glib, which in turn is needed for Fluidsynth on Darwin (refs #10014)

contrib: added target for glib since this is a required dependency to compile fluidsynth (refs #10014)

http://gonze.com/playlists/playlist-format-survey.html#ASX

somehow #3435

Close #10019

Having pts doesn't mean we have a valid index.
Also, waiting 50 frames, including all streams is pointless.
We expect at least a keyframe within 60 sec on seek track.
This wait is lowered to 5 sec of data if we estimate a low
bandwidth (that one might need a better hint)

Signed-off-by: Felix Paul Kühne <fkuehne@videolan.org>