The option is mostly useful to make ffprobe output independent from the
build, and in particular to fix FATE --enable-small failures.

Fix regression introduced in 749ddc14.

Allow to skip section name at the begin of each line. Possibly simplify
output.

This is for interoperability purpose with the fork.

Liberally based on the work of Luca Barbato <lu_zero@gentoo.org>, done
for libav/avprobe.

Address trac ticket #1265.

Help simplifying parsing in certain cases.

The option is useful for simplifying parsing.

Also use the new option in fate, in order to fix the regression
introduced by the previous commit.

Signed-off-by: Stefano Sabatini <stefasab@gmail.com>

metadata is already plural.

Found-by: Alexander Strasser

Add -show_frames option to ffprobe.

Partially based on the work of Thomas Kuehnel <kuehnelth@googlemail.com>
for SOCIS 2011.

The wicked idea of creating a special "packets_and_frames" container for
structured formats (JSON and XML) comes from Clément.

This allows -print_format to accept string of the form WRITER=OPTIONS,
as required by the pending compact writer patch.

Also update documentation related to the output format.

Useful for mimicking the ffmpeg -i FILE syntax.

Muxers are not used by ffprobe.

This reverts commit f8a45fa1.

Conflicts:

	doc/optimization.txt

unless it stands for ffmpeg the program or is historic