SET_ES_FMT recreates decoders and then triggers preroll.

Prevents creating ES & decoders just for playlist preparsing.

Also cleans seekpoints between tracks

icu-config is not suited for cross-compilation

People do not read that far and keep asking for support anyway.

Provide a description of the codec if possible
Give a more descriptive message if the codec is "undf"
That one means that the demuxer could not identify the codec

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

Close #10127

When we don't have a way to select a font by family, use the basic font
(default or the config one)

This reduces the number of HAVE_STYLES usage and avoid a few bugs