Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

This makes it more clear what is this variable for exactly.

This makes it more clear what is this variable for exactly.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Store a variable per OutputStream instead of globals for
audio/video/extradata. This makes the code simpler and cleaner and fixes
2pass with multiple output streams.

It is private and must not be touched from outside of lavf.

Quite useful for debugging.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

It limits the duration of the data read from a given input.

Insert (a)trim filters on the corresponding inputs, so the extra frames
are decoded and discarded.

Hack partially based on a commit by Michael Niedermayer <michaelni@gmx.at>
Should fix (or work around) bug 458.

We do not support using filters without AVFilterGraph in practice
anyway, so there is no point in pretending we do.

It has not worked for anything other than fringe codecs (asv1/2, mdec,
mjpeg[b]) since about 2003 and nobody ever noticed or complained. This
sufficiently proves that there are no users of this option who have a
clue of what they are doing, so it is completely useless.

func2_arg is the same as func_arg, except it has one additional
parameter. Change all func_arg callbacks to take that parameter (and
ignore it).

The new name is shorter and more accurate, since this variable is no
longer used only for checking recording time constraint.

This simplifies splitting code for reading from input out of
transcode().